Buildings of the future - from 2009 to 2011 - Press Velux
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Buildings of thefromfuture
2009 to 2011
Today’s challenges in buildings: In the EU today, we spend 90 % of our time indoors, in buildings that consume over 40 % of the total energy consumption. Up to 30 % of the building stock does not contribute to nor provide a healthy indoor climate. Looking into a future perspective of how we construct and renovate buildings, it is necessary to consider climate changes, resource supply and human health. Renderings of Home for Life: Contents aart Photos of Home for Life: 5 Situation today and the solution Adam Mørk and Martin Dyrløv Renderings of Green Lighthouse: 6 Active House Christensen & Co Architects 8 Six experiments Photos of Green Lighthouse: Adam Mørk 10 VELUX stakes Renderings of Sunlighthouse: HEIN-TROY Architekten 20 Experiment # 1: Home for Life Photos of Sunlighthouse: 30 Experiment # 2: Green Lighthouse Adam Mørk Renderings of LichtAktiv Haus: 40 Experiment # 3: Sunlighthouse Cenario Photos of LichtAktiv Haus: 48 Experiment # 4: LichtAktiv Haus Adam Mørk 60 Experiment # 5: CabonLight Homes Renderings of CarbonLight Homes: HTA Architects 68 Experiment # 6: Maison Air et Lumière Renderings of Maison Air et Lumière: Cenario 75 Learning Other photos: The VELUX Group
Future experiments
VELUX House
Completed in 2009
Model Home 2020 for COP15 in Copenhagen
Six projects under development
2009-11
Atika Background Situation today Sustainable Living
Completed in 2006 Since 1941, the VELUX Group has been The future of construction is facing serious design to create an efficient building en We relate sustainability to buildings and
working to improve living conditions and challenges – resource supply, energy effi velope without compromising the highest we have defined our conceptual thinking
manmade environments. With the invention ciency and unhealthy buildings to name standards of comfort and health; and it in this large and globally relevant issue
of the VELUX roof window, it became pos- but three. The real challenge facing us is should have the lowest possible impact as Sustainable Living. It is based on:
sible to convert otherwise uninhabitable essentially a dual challenge – energy and on the climate by using renewable energy
attics into comfortable and attractive living liveability. sources and adopting the concept of • Maximised energy efficiency and
space in millions of homes around the climate payback. minimised CO2 emissions
world. Today, VELUX roof windows are part The EU has adopted a comprehensive pack- • Visionary architecture combined
of an entire system that provides people age for European energy policy up to 2020. The VELUX Group is working hard today on with improved health, well-being
with daylight, fresh air and outlook. The It entails that EU member states are to re- the solutions of tomorrow by promoting ar- and comfort for people
underlying principle of the VELUX range of duce their total energy consumption and chitecture that enhances our quality of life • Renewable energy sources, with
products is to transform homes into self- CO2 emissions by 20 %. Moreover, all EU and the sustainable development of society. focus on thermal solar energy
sufficient organisms that let daylight, sun member states must document that 20 % The VELUX Group has already developed
and natural air flow inside, harnessing and of their total energy consumption comes CO2 -neutral solutions – the SOLTAG demo
controlling them to create the indoor com- from renewable energy sources. house for markets in Northern Europe and
fort and energy conditions necessary for the Atika concept house for the Mediter-
better living. The solution ranean countries.
SOLTAG In order to find solutions to the challenges
Completed in 2005 of climate change and liveability, we need We wish to contribute to setting the agenda
to examine a future model that addresses for a new generation of energy-efficient
them as a holistic solution. housing that does not compromise people’s
living comfort, but ensures a healthy indoor
The ultimate objective of future construc- climate with plenty of fresh air and daylight
tion is three-fold. It should ensure that the while also ensuring architectural quality.
energy consumed in the construction and
subsequent use of a building is taken into Part of this strategy is the project Model
account in the design phase; it should Home 2020 – our vision for how we should
employ modern technology and visionary construct future buildings.
4 MODEL HOME 2020 VELUX 5
Vision Key principles of Active House
Active House is a vision of buildings that product development, research initiatives An important aspect of the Active House
create healthier and more comfortable lives and performance targets that can move us concept is that of ‘integration’. Although
for their occupants without impacting neg- further towards the vision. Energy, Indoor climate and Environment
atively on the climate – moving us towards are essential components of the vision, it
a cleaner, healthier and safer world. Active House proposes a target framework is the way their integration promotes archi-
for how to design and renovate buildings tectural quality, human health, comfort and
The Active House vision defines highly that contribute positively to human health well-being which represents the value of
ambitious long term goals for the future and wellbeing by focusing on the indoor and the building.
building stock. The purpose of the vision outdoor environment and the use of renew
is to unite interested parties based on a able energy. An Active House is evaluated on
balanced and holistic approach to building the basis of the interaction between energy
design and performance, and to facilitate consumption, indoor climate conditions and
cooperation on e.g. building projects, impact on the external environment.
Energy Indoor climate Environment
• A building which is energy efficient • An indoor climate that promotes health, • A building which exerts the minimum
and easy to operate comfort and sense of well-being impact on environmental and cultural
• A building which substantially exceeds • A building which ensures good indoor air resources
the statutory minimum in terms of quality, adequate thermal climate and • A building which avoids ecological dam-
energy efficiency appropriate visual and acoustical comfort age and seeks to add to local biodiversity
• A building which exploits a variety of • An indoor climate which is easy for occu- • A building which is constructed of mater
energy sources integrated in the overall pants to control and at the same time ials which have high recycled content and
design encourages responsible environmental which provides the ability for its own re-
behavior cycling or re-use
Integration of the three main principles of
energy, indoor climate and environment
• A building which integrates the demands
of comfort, climate, energy, environment
and ecology into an attractive whole
• A building where such integration adds to
architectural quality and human wellbeing
• A building whose interactive systems and
spaces add to human enjoyment and sup-
port environmentally responsive family life
Energy – Contributes positively to Indoor Climate – Creates a healthier and Environment – Has a positive impact
the energy balance of the building more comfortable life on the environment
An Active House is energy efficient and all An Active House creates healthier and more An Active House interacts positively with
energy needed is supplied by renewable comfortable indoor conditions for the occu- the environment by means of an optimised
energy sources integrated in the building or pants and the building ensures generous relationship with the local context, focused
from the nearby collective energy system supply of daylight and fresh air. Materials use of resources, and on its overall environ-
and electricity grid. used have a positive impact on comfort and mental impact throughout its life cycle.
indoor climate. Active House is an initiative supported by the VELUX Group
6 MODEL HOME 2020 VELUX 7
Six experiments
Denmark
Q2 2009
The VELUX Group has launched the project They will all reflect and respond to three
Model Home 2020. It is our vision for climate- main principles – efficient energy design,
neutral buildings with a high level of liveability. high degree of liveability and minimum cli- United Kingdom
This is part of a VELUX strategy to take an mate impact – as well as the different cli- Q2 2011 Denmark
active part in developing sustainable build- matic, cultural and architectural conditions Q4 2009
ings – the buildings of the future. The vision of the countries in which they are built.
and principles behind Model Home 2020
need to be developed and tested; so from Our philosophy is that one experiment is
2009 to 2011, we will build six full-scale better than a thousand expert views.
experimental demo-houses which will be Germany
placed at six different locations in five Testing and monitoring Q4 2010
countries. The testing and monitoring of the Model
Home 2020 experiments will be part of
The houses in Denmark (Copenhagen and an overall initiative where each of the
Aarhus) were built in 2009, the ones in experiments around Europe will provide
Germany and Austria opened in 2010 and data to be collated, reviewed and reported.
those in the UK and France will follow in
2011. The two experiments in Denmark The houses will be open to the public for
were built as a partnership between the 6-12 months after completion, after which
VELUX Group and VELFAC. Each of the six there will follow a 12 month period with
houses will also involve a number of local test families in residence. After that the France
and regional partners, suppliers, architects, houses will be sold below the market price. Q3 2011
engineers and researchers.
In return, we will continue to monitor the
experiments with the new residents in
order to learn how the buildings perform
in real life conditions.
Austria
Q4 2010
“You never change things by fighting
the existing reality. To change something,
build a new model that makes the existing
model obsolete.”
Buckminster Fuller
8 MODEL HOME 2020 VELUX 9
VELUX stakes
“We take responsibility in accordance with our goal Energy demands in synergy with liveability
to be a model of good behaviour and to be useful to
society – and because our business depends on our
products being used when the low-energy buildings
of the future are built.”
Jørgen Tang-Jensen, CEO, The VELUX Group Better view More daylight More fresh air Intelligent control
Daylight, energy and indoor climate Product categories
The benefits of VELUX products today are In the Model Home 2020 experiments,
more important than ever before. Daylight five main product categories will be incor
and fresh air have been at the core of our porated. They can stand alone or be com-
business since the company started in 1942. bined in many different ways, as in Model
By bringing daylight and fresh air into people’s Home 2020. The five categories have a Reduced heat loss Solar heating
homes, the VELUX Group has contributed decisive influence on the energy balance On winter nights Absorb energy for
to improving the well-being of the people of the house: the insulating effect domestic hot water
living in them. Buildings should be designed of sunscreening and room heating.
to ensure thermal and visual comfort as well • Roof windows – a wide range of various products reduce
as the quality of the breathable air inside roof windows to match any need heat loss.
them. Building design must be a balance be-
tween good energy performance and good • Blinds and shutters – that control day- Cold season
indoor climate conditions. For a number of light and heat with functional, decorative Solar gain Stack effect
years, we have dedicated considerable re- and easy-to-install window accessories Let in heat through A large distance
Heating demand
sources to building unique skills and acquiring that allow for individual needs and pref south facing roof between the ventilating
documentation of the effects of our products erences windows. openings speeds up
in the fields of energy efficiency, indoor climate airing – quicker airing
and the benefits of daylight. • Solar energy systems – that supply minimises heat loss.
hot water and room heating and have
Climate change been designed to optimise effective-
Climate change is an equally important item ness, aesthetics and convenience
on the agenda. The VELUX Group works to
supply products that help reduce CO2 emis- • Installation products – that ensure
sions from buildings without compromising a tight seal between window and roof
Cooling demand
on the highest standards of daylight and construction
indoor comfort. With our products and the
way they are used, we wish to contribute • Home automation – electrically operated
Indirect daylight Hot season Cooling by ventilation
to more sustainable buildings. We are inten- windows, blinds and shutters bring intel
North facing roof On summer nights it
sifying our own efforts to reduce global CO2 ligent technology (io-homecontrol®) that
windows let in is time to cool down
by making considerable investments and optimise comfort.
daylight with a the entire building
setting ambitious goals. The strategy is
minimum of solar and interior.
two-fold: reduction of our own environmen-
gain.
tal impact and environmentally beneficial
improvements in the use of the company’s
products. We go to great lengths to reduce
the environmental impact of the production,
use and disposal of our products. We have Reduced solar gain Heat protection
a responsibility to contribute to alleviating The awning blind On hot summer days the
global climate problems, and reducing reduces solar gain and south facing shutters
the climate impact of our operations and luminance permitting protect the interior
our products is an important part of that a slightly reduced view. from overheating.
responsibility.
10 MODEL HOME 2020 VELUX 11
VELUX stakes
VELUX roof windows
VELUX roof windows are well-known for The intelligent control will even open and
bringing fresh air and daylight indoors. They close windows at pre-set times and dates,
have minimum environmental impact and and at programmed intervals. The exact
harness the unlimited supply of free natural settings of all windows, blinds and roller
energy. Depending on their size, they provide shutters in the home are monitored and
larger amounts of daylight and passive solar controlled to create the ambience the user
gains than facade windows, thus reducing wants. A built-in rain sensor ensures that
the need for electrical light and heating. Be- windows are closed immediately at the first
cause of their strategic location in the sloping drop of rain. Converting existing manually-
roof, VELUX roof windows are highly energy- operated roof windows to fully-functional
efficient light sources. electrically operated windows is a simple
procedure for professionals as well as house
We offer three categories of roof windows: owners.
solar powered, electrical (wired) and manual.
The programming of the electrically operated
Real time energy balance
VELUX solar products comprise a range windows or sunscreening products can even
The real time energy balance webpage
of windows, sunscreening accessories and be performed by the house owner, depending
shows the current energy balance and
internal blinds that are supplied with energy on practical needs and seasonal consider
daylight provision of VELUX roof windows
from the sun by integrated photovoltaic ations.
installed in the following Model Home 2020
arrays. So they take no electricity from
experiments: Home for Life, Sunlighthouse,
the grid whether in standby mode or in All VELUX electrical products are compatible
LichtAktiv Haus. The current energy balance
operation. with io-homecontrol® technology, a wire-
is calculated based on the sun position, time
less communication protocol that enables of day, window orientation and location of
All VELUX roof windows have highly effi- interaction between products from different the house together with measured weather
cient, gas-filled, coated glazing units that manufacturers. io-homecontrol is noted for data. For specific roof windows the user
minimise heat loss. its high level of security, equivalent to that can adjust the solar shading and see the
of secured Internet payments. A fundamental effect on the energy balance and daylight
VELUX roof windows have a long life span part of io-homecontrol technology has been provision. Predicted weather situations are
– up to forty years. Most of the timber used adopted as a standard in the EU, meaning also available making it possible to illustrate
in making them comes from sustainable that VELUX electrical products are already winter or summer situations all year round.
PEFC- or FSC-certified forestry. The glass in accordance with future EU requirements
and aluminium used in the windows can be governing radio frequency and security. To experience the real time energy balance,
recycled.
visit www.velux.com/modelhome2020
All in all, VELUX electrical products bring
VELUX roof windows improve the indoor new solutions for improved home comfort,
climate by supplying generous amounts energy savings, security and indoor climate
of daylight. As they are located at the top control.
of the building, they also provide efficient
ventilation and fresh air to the occupiers. PEFC certified
VELUX wooden roof windows are
They help regulate the temperature and from sustainably managed forest
ensure efficient cooling of the building at and controlled sources
night. The electrically operated models PEFC/09-31-020
www.pefc.org Heat loss
Heat loss Solar gain
Solar gain Energy
Energy balance
maximise all the advantages of the manual (U-value)
(U-value) (g-value)
(g-value) balance
(Eref)
models. (Eref)
The roof window energy balance
The electrical product line allows all roof The term energy balance is used to describe
windows and sunscreening products in the energy characteristics of a window –
people’s homes to be controlled with a the balance between solar gain and heat
single remote control. Windows, blinds loss. Energy balance is calculated as the
and roller shutters can even be programmed sum of usable solar gain through the win-
to ‘think’ for themselves, making sure that dow during the heating season minus any
the home is filled with clean, fresh air when- heat loss. Energy balance is a more accurate
ever wanted. way of describing the energy characteristics
of a window than just the Uw -value, as
energy balance includes both Uw -value and
g-value to provide a more complete picture.
12 MODEL HOME 2020 VELUX 13
VELUX stakes
29°C No solar shading
Experienced indoor temperature
Experienced temperature
32° Intelligent solar shading
27°C
30°
25°C Overheating
28° without solar shading
23°C
26°
With intelligent solar shading
21°C 24°
00:00 03:00 06:00
6:00 09:00 12:00
12:00 15:00 18:00
18:00 21:00
0:00 00:00
Time of day
Time [hh:mm]
Blinds and shutters
Optimised indoor comfort and
energy savings Solar-powered versions Awning blind
VELUX blinds and roller shutters contribute If energy saving has the highest priority,
to improving the indoor climate and help we recommend VELUX solar-powered
home owners save energy. VELUX blinds decoration and sunscreening products in
and roller shutters enable them to control combination with VELUX solar-powered
daylight and heat intake and heat loss roof windows. These products are powered
– all factors that have an influence on by solar cells and are therefore self-suffi-
indoor climate. cient in energy and need no external power
supply. The solar cells generate electricity
VELUX blinds and roller shutters reduce even with indirect sunlight, so they are
heat loss through the window by up to 34 %, reliable all year round. And as no external
depending on the type of window pane, wiring is needed, installation is a quick and
blind or roller shutter, ensuring improved simple job.
insulation during cold winter nights.
Roller shutters Roller shutter
For the best protection against heat, sun-
light must be stopped before it reaches
the window pane. That is why VELUX heat
protection products are positioned outside.
If maximum heat protection and total black-
out is needed, the best solution is the VELUX
roller shutter. It stops the sun’s rays before
they strike the window, blocking out up to
95 % of the heat from outside and ensuring
a pleasant indoor climate, even on hot days
with direct sunlight. The VELUX roller shutter
offers several key benefits:
• Optimal heat protection
• Optimal blackout (100 %)
• Security – helps to prevent break-ins
• Energy-saving – provides insulation
in the winter
• Protection from the elements.
VELUX roller shutters are available in
manual, electrical (wired) and solar-
powered versions.
14 MODEL HOME 2020 VELUX 15
VELUX stakes
Thermal solar energy
The sun provides incredible amounts of
energy. As hard as we try, we will never
be able to consume it all.
The VELUX thermal solar energy systems
for domestic hot water and room heating
are designed to maximise efficiency,
aesthetics and convenience.
They use the sun’s energy to provide the hot
water used in the building, meeting up to
70 % of occupier requirements. Their instal-
lation is of the same renowned high quality
of all VELUX installations. They result in an
aesthetically pleasing placement and are
easily mixed with VELUX roof windows.
VELUX solar collectors are a safe, secure
and elegant solution, using the sun’s heat
to provide hot water for heating and hot
water for households.
16 MODEL HOME 2020 VELUX 17
VELUX stakes
2
3
4
6
5
7
System solutions Home automation
VELUX installation products ensure that rest of the construction. The insulation 1 Roller shutter VELUX home automation systems give
the VELUX roof window is connected to frame also ensures the highest installation 2 Flashing added performance through intelligent
the roof in the most energy-efficient way. quality and minimises unnecessary heat 3 Underfelt collar technology, such as io-homecontrol that
No matter how energy-efficient an individual loss in the space between window and 4 Roof window optimises comfort and convenience.
building component is, it is never better than roof material. 5 Insulation collar
its fitting to the rest of the building. Over 60 6 Vapour barrier All electrical products in the system are
years, the VELUX Group has developed a To meet today’s stringent demands for 7 Lining based on io-homecontrol and share a
unique installation procedure that is well energy-efficient buildings, homes must 8 Interior sunscreening common platform for interchange of in-
known throughout the industry. It ensures be airtight. Any penetration of a building’s 9 Electrical operation formation, allowing them to work together
the best possible connection to the roof and climate shell could compromise those intelligently. We offer automation solutions
eliminates unnecessary energy loss between demands. The VELUX installation proce- for existing as well as new installations.
roof and window. dure prevents that and ensures the most
secure installation in the roof. The VELUX Group has more than 30 years’
The underlying principle is to install the experience in electrical operation of windows,
window deep into the roof, and to use the blinds and shutters – and our solutions work
correct flashing, the BDX insulating instal- quietly and effectively at the press of a
lation frame and the BBX vapour barrier button.
collar to ensure tight connection to the
VELUX ACTIVE Climate Control adds a
8
whole new dimension of home climate
7 control by opening and closing windows
6
and sunscreening products automatically
as sunlight and temperature change.
5
4
3
io-homecontrol® provides advanced and secure radio technology that is easy to install.
io-homecontrol® labelled products communicate with each other, improving comfort,
security and energy savings.
2
www.io-homecontrol.com
1 9
18 MODEL HOME 2020 VELUX 19Experiment # 1
Elmehaven 1, 8520 Lystryp, Denmark
Home for Life is the result of an inter Life, light and air reflected
in the architecture
disciplinary project to synthesise the The house has 190 m2 of floor space, dis-
tributed over 11/2 storeys. The window
The look and feel of this model home is an
interpretation of the archetypical residence
parameters of energy, comfort and visual area (facade windows and roof windows)
is equivalent to 40 % of the floor area.
as a futuristic ‘energy machine’ that inter-
acts with nature and the life lived inside
appeal into a holistic entity, where the The principal architectural idea in Home
the home.
parameters are mutually complementary for Life is to unite single-family house re-
quirements to experience, functionality
and maximise the quality of life in the and energy consumption in an integrated
design. It is the light incidence, the active
home and the world around it. facade, the relationship between indoors
and out and the flexibility of the house that
gives it its high architectural quality.
20 MODEL HOME 2020 VELUX 21Experiment # 1 Project partners: VELFAC and
the VELUX Group
Architects: aart
Energy concept: Esbensen Rådgivende
Ingeniører
Turn-key contractor: KFS Boligbyg
The active facade Daylight Ventilation
The choice of slate covering on the facade The use of daylight has been optimised There is generous provision of fresh air in
and roof reflects both the wish for durability, to ensure the health and well-being of the Home for Life. In the winter, the air enters
low CO2 impact and minimal maintenance, residents as well as to minimise consump- via the mechanical ventilation system with
and the wish to integrate the dark surfaces tion of electric light during daytime. The heat recovery. The equipment is programmed
of the solar cells, the solar panels and the window area amounts to 40 % of the floor to adapt to the ventilation needs of the
windows in a sculptural composition. The area (as opposed to the usual 20-25 %), rooms. The air is circulated into the ‘clean’ Shed Carport
wood covering and wood flooring, with with the windows placed in all four facades rooms (bedrooms and living rooms) and
their feeling of natural warmth, provide a as well as the roof to ensure plenty of nat exhausted from the utility rooms (kitchen,
contrast to the hardness and cold expres- ural light, distributed deep into all rooms. bathroom, laundry room). In the summer, Pergola
sion of the slate. Daylight levels are evaluated and finally fresh air enters through natural ventilation
defined via simulations in VELUX Daylight controlled by a sensor in the house; this
The active facade changes according to the Visualizer 2 and model studies in a light lab. ensures that the home is not ventilated Attic (space)
seasons and needs. It can either be open to more than necessary at the same time as Bathroom/
toilet
Engineering
Room
let in light and heat, or it can be closed to Home for Life uses the energy-optimised maintaining a good indoor climate. The nat- Living room
Hall
Utility room Shed w/pantry Bathroom/toilet
Terrace
Room
screen against the sun and retain heat during windows of the future, with linings that ural ventilation replaces the mechanical Bedroom
the night. transmit light deep into the rooms. The system during summer and reduces energy
house’s active facades regulate light and consumption. Balcony
solar gain. The south-facing roof overhang
creates shade from a high summer sun and Covered terrace
(Open) Kitchen
and dining room Terrace
admits light from a low winter sun. Shutters
and blinds regulate solar heat and ensure
privacy when needed. The size and place-
ment of the windows have been determined Terrace
by the position of the sun in the sky, seasons,
energy optimisation and the needs of the Ground floor First floor
residents. Furthermore, the risk of glare
is avoided with screening both inside and
outside.
22 MODEL HOME 2020 VELUX 23Experiment # 1
Daylight levels
Daylight Factor %
10.0
8.8
Net energy balance CO2 balance
7.5
6.3 70
In kWh/m²/year
5.0
3.8
2.5 60 14
In kg CO2 eq/m²/year
Surplus
1.3 9.4 13
Running 12
50 installations Solar cells 11
6.7 29.1
10
Energy 40 Household
13.2 9
The total energy consumption is minimised 8 Appliances
and met by renewable CO2 -neutral energy 30 Solar collectors
7
PV solar cells
3.8 %
generated by the building itself. After around Hot water
11.1 6
30 years, the surplus energy is equivalent 18.3
5 Installation heat loss
20
5.0 % to the amount of energy represented by the 4
5.0 % materials from which the house is built. Heat pump 3 Hot water
A primary parameter in the energy design 10 Heating
22.4
2
15.0
2.5 % is the fenestration; positioned to cater for 1 Heating
6.3 % energy technology and visual appeal, the 0 0
5.0 %
windows optimise light, air and solar gain. Energy Production Energy CO2 emission CO2 compensation
requirement of renewable surplus
energy
The house is managed in such a way that
electricity and heat are used to a minimum. Home for Life produces an annual energy surplus
In the summer, the automatically controlled calculated at 9.4 kWh/m²/year. The calculation of
the energy performance and production has been
natural ventilation is used to air the rooms.
made according to national standards.
During the heating season, mechanical ven-
tilation with heat recovery is used, so the
cold air can be heated without the use of
First floor additional energy. Intelligent control regu-
lates the outdoor and indoor sun screening
for optimising heat and light intake as well
as switching off the light when the room is
not in use. Energy for
Daylight Factor % solar cells
10.0 (electricity)
8.8 • Solar cells, solar heating and a heat
7.5 Direct energy
6.3 pump produce electricity, hot water (solar gain
5.0 and room heating. through pane)
3.8
2.5
• About 50 % of heating requirements
1.3 are met by passive solar heat from the
energy-optimised windows. Natural ventilation Energy for
• Natural and mechanical ventilation, (stack effect) solar collectors
(hot water)
as well as internal and external sun
screens ensure fresh air and a com-
fortable room temperature.
• The control system of the house
reduces energy consumption and
6.3 % 5.0 % ensures a healthy indoor climate.
Heat
recovery
(reuse heat) Natural ventilation
3.8 %
(stack effect)
3.8 % Heat
pump
Water tank
6.3 %
8.8 %
Ground floor
24 MODEL HOME 2020 VELUX 25Experiment # 1
Bedroom 2 Bedroom 1 Bathroom Prizes and mentions
2 triple-glazed centre-pivot roof windows 2 triple-glazed centre-pivot windows 2 triple-glazed centre-pivot roof windows with
with white polyurethane finish and solar with white polyurethane finish and solar white polyurethane finish (GGU U04 0065) Green Good Design Award 2010 Selected entrant
window operators (GGU U04 006530) window operators (GGU U04 006530) 1 solar window operator (KSX 100) Home for Life won the Green Good Design At the Architects Council of Europe (ACE)
2 solar window operators (KSX 100) 2 solar window operators (KSX 100) 2 frame extensions (LGI U04 2000) Award 2010, selected from thousands 20th anniversary exhibition in 2010 at the
2 frame extensions (LGI U04 2000) 2 frame extensions (LGI U04 2000) 1 installation set (BDX U04 2010) of submissions from over 46 countries. European Parliament in Brussels. Home
1 installation set (BDX U04 2010) 1 installation set (BDX U04 2010) 2 vapour barrier collars (BBX U04 0000) for Life was selected as an entrant for the
2 vapour barrier collars (BBX U04 0000) 2 vapour barrier collars (BBX U04 0000) 2 solar roller blinds (RSL U04 4070) Bo Grøn Award exhibition from numerous submissions
1 special flashing set for 2x2 roof windows 2 solar blackout blinds (DSL U04 1025) In September 2010, Home for Life won the from all over Europe.
in both bedrooms (EBLX99 U04) 2 solar awning blinds (MSL U04 6080) prestigious Bo Grøn award (Live Green). It is
2 solar blackout blinds (DSL U04 1025) 1 triple-glazed facade window with presented annually for an idea, invention or
2 solar awning blinds (MSL U04 6080) white painted finish (VFAX P38 2065G) design that can help make a greener home.
1 triple-glazed centre-pivot roof window
with white painted finish (GGL P06 206)
1 installation set (BDX P06 2000)
2 vapour barrier collars (BBX P06 0000)
1 flashing (EFL P06 0000)
1 frame extension (LGI P06 2000)
1 frame extension (LGI P10 2000) Kitchen-dining room Technical Data
1 manually operated blackout blind 4 triple-glazed centre-pivot roof windows The chart shows the technical characteris-
(DKL P06 1025WL) with white polyurethane finish and solar tics of the VELUX roof windows in relation
1 manually operated blackout blind window operators (GGU S06 006530) to heat loss, passive solar gain and daylight.
(DKL P38 1025WL) 4 solar window operators (KSX 100) The heat loss (Uw) of the roof windows is
4 frame extensions (LGI S06 2000) influenced by the roof pitch. The solar gain
4 installation sets (BDX S06 2000) (g-value) and light transmittance (τ) are not
4 vapour barrier collars (BBX S06 0000) affected by the orientation or roof pitch.
7 combi flashings for roof windows and
solar collectors (EKL S06)
3 combi flashings (EKX S06) Roof windows with pane --65
4 solar awning blinds (MSL S06 6080)
4 solar roller blinds (RSL S06 1028) Roof pitch 90° 30° (South) 45° (North)
Uw (Heat loss U-value window) 1.0 W/m K 2
1.1 W/m K
2
1.1 W/m2K
Ug (Heat loss U-value pane) 0.5 W/m2K 0.7 W/m2K 0.6 W/m2K
g (Solar gain g-value) 0.45 0.45 0.45
τ (Light transmittance) 0.67 0.67 0.67
Outer walls
U (Heat loss U-value) 0.1 W/m2K (395 mm insulation)
Roof
U (Heat loss U-value) 0.07 W/m2K (540 mm insulation)
Floor slab
U (Heat loss U-value) 0.07 W/m2K (500 mm insulation)
Fenestration
Window area 75 m2
Floor area 190 m2
The window area is equivalent to 40 % of the floor area.
Thermal solar energy
6 solar collectors (CLI S06 4000) and flex-
tubes for solar collectors (ZFR + ZFM 020)
26 MODEL HOME 2020 VELUX 27Experiment # 1
Hours overheating
Tested in real life Energy
Part of month/year with hours in comfort conditions
I (Best) II (Good) III (Acceptable) IV (Overheating)
The results from Home for Life show that Automatic control systems for heating, The house meets 2020 requirements and 100
the house really is zero-carbon, meaning mechanical ventilation, natural ventilation is classified by building regulations as a 90
that the building-integrated production of and solar shading are necessary for optimal surplus-energy house.
80
energy will be greater than the use of energy, performance in low-energy buildings. The
70
after planned adjustments have been made. system’s communication can be something The overall operation of the house is ex-
Home for Life was designed to be zero-car- of a challenge in terms of user friendliness, pected to produce a surplus of energy of 60
bon but also to have great daylight condi- and the intuitive interaction and communi- 1,700 kWh/year. Total energy consumption, 50
tions and an excellent indoor climate. Both cation between technicians and occupants including domestic electricity, is expected 40
the quantitative daylight measurements can be optimised. to be 2,000 kWh/year. 30
and the qualitative interviews show that
20
the daylight conditions are very good, with The transition periods (spring and autumn) Energy consumption for heating is higher
10
high levels of well-balanced daylight and are particularly challenging. The indoor air than expected as the average room temper-
access to direct light in all main rooms. quality is evaluated based on CO2 levels. ature was 2-3 degrees higher than calculated 0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
The occupants also express satisfaction by the Danish Building Research Institute’s
with the daylight conditions. CO2 measurements generally indicate a approval tool Be06. The residents have a The indoor temperature is evaluated according to the European standard EN 15251, which
good indoor air quality, but with elevated major influence on deviations in the build- defines four comfort categories from I (best) to IV (unacceptable). The figure shows the
Measurements and registrations were made levels in the sleeping rooms. ing’s energy consumption, exacerbated when distribution of categories for each month and for the entire year. More than 95 % of the hours
in connection with the research project they have the possibility of interacting with of the year are in category I, which means that the family room is categorised as I as far as
indoor temperature according to EN 15251 is concerned.
Minimum Configuration & Home Auto The family expressed satisfaction with the the control and regulation of the house.
mation. Measurements, observations and access to fresh air and the air quality, which CO2 concentration
“Right from the start we noticed that the air in interviews were carried out by The School indicates that CO2 levels above 1,200 ppm The heating system should be dimensioned
the house was good. The rooms are comfortable of Engineering in Arhus, the Alexandra may be acceptable in residential buildings. in accordance with the individual building’s
Part of month/year with hours in comfort conditions
I (Experiment # 2 Building owner: The Danish University and
Property Agency
Strategic partners: The Municipality of Copenhagen,
the University of Copenhagen,
the Danish University and
Property Agency, VELFAC
and the VELUX Group
Architects: Christensen & Co Architects
Energy design: COWI
Tagensvej 16, 2200 Copenhagen N, Denmark Turn-key contractor: Hellerup Byg
Green Lighthouse
The University of Copenhagen, The Danish The partners wanted the project to become
University and Property Agency, the Muni a beacon for sustainable building in Copen-
cipality of Copenhagen, VELFAC and the hagen, Denmark and the rest of Europe.
VELUX Group have entered a strategic The Green Lighthouse, as it is known,
alliance to construct a new sustainable served as a showpiece for the UN Climate
building with optimal balance between Change Conference (COP15) held in Copen-
energy efficiency, architectural quality, hagen in late 2009.
healthy indoor climate and good daylight
conditions. The building was ready at the Green Lighthouse, the first public CO2 -
end of 2009 and offers facilities for the neutral building in Denmark, has been
dean, professors and students of the endorsed by the European Commission’s
Faculty of Science at the University of Sustainable Energy Europe Campaign
Copenhagen. as an Official Partner.
30 MODEL HOME 2020 VELUX 31Experiment # 2
Testing and monitoring
Green Lighthouse is monitored and meas- with assistance during implementation
ured as part of a wide range of quantitative and a follow-up energy measurement
surveys. A qualitative user survey amongst programme in a three-year period as well
the employees in Green Lighthouse is carried as communication of project results.
out by Post. Doc. Bettina Hauge.
Green Lighthouse is certificated to the
EUDP, the Danish Energy Technology Devel- American LEED programme, in which
opment and Demonstration Programme, points are awarded according to a long
contributes to verifying whether the experi- list of sustainability issues, such as water
ment Green Lighthouse succeeds or not. efficiency, energy consumption and at
The final result is a status report. EUDP mosphere materials and resources, indoor
supports the Green Lighthouse project climate, innovation and design.
32 MODEL HOME 2020 VELUX 33Experiment # 2 Energy design by COWI
Net energy balance CO2 balance The primary energy is calculated
according to the Danish Energy
40 Calculation tool BE 06.
In kWh/m²/year
5.0
STAND IN
In kg CO2 eq/m²/year
30 4.5
Running installations 2 Deficit
3
4.0
Lighting
7 3.5
20 Ventilation 3.0
3 PV solar cells PV solar cells
Hot water
20 2.5 Installation heat loss
4
2.0
Hot water
10 1.5
Room heating
14
1.0
Heat pump, Heating
seasonal storage
Heat pump
and thermal solar heat 0.5
7
Solar collectors
0 0.0
Energy Production Energy CO2 emission CO2 compensation
requirement of renewable need
Energy concept energy
The purpose of the Green Lighthouse energy The energy concept is a real experiment and
concept is to make the building CO2 -neutral. this is the first time it is applied in Denmark.
Green Lighthouse is a completely new ex- In the long term, this solution could be used
Atrium ventilation PV solar cells Solar gain Solar thermal collectors
periment, with energy supply being a com- in construction of office and industrial A large distance between produce electricity for hy- through south facing for domestic hot water, room
bination of district heating, solar cells, solar buildings in most parts of Europe. The energy the ventilating openings brid ventilation, pumps windows. heating and seasonal storage.
heating and cooling, and seasonal storage. concept will undoubtedly be used when speeds up airing – quicker and LED lighting. During summer solar cooling
planning the energy supply of CO2 -neutral airing minimises heat loss. through heat pump.
This energy concept, developed by COWI, constructions in the future.
is a new kind of solution using district heat-
ing to power a heat pump. By using district
heating instead of electricity, less CO2 is
produced and energy is used far more
efficiently. Hybrid ventilation
with heat recovery for
The energy concept ensures the utilisation 1. days where the weather
of renewable sources of energy. This inter- conditions do not allow
action means that the sun is used not only Reduce the demand for energy by avoiding waste
LED lighting natural ventilation.
and implementing energy-saving measures.
for cooling during summertime, but also 3. powered by the
solar panels.
to improve the efficiency of the heat pump
Produce and use
during winter.
fossil energy as Intake of fresh air
efficiently as possible
Thermal solar energy is generated by VELUX 2. via electrically
operated windows.
solar collectors. It is used for hot water, floor Night cooling
Use sustainable sources of energy
During the night, the
heating or, when heating is not required,
warmed-up building instead of finite fossil fuels.
stored in the ground. A heat pump circu- 2. parts emit heat.
lates solar heat, stored heat and cooling
in the building. This ensures optimal utili- Use sustainable sources of energy
sation of district heating, as it will only be instead of fossil fuels
used if solar heat is unavailable. 3. External sunscreening
Produce and use fossil Automatic sunscreening
High-insulating energy as efficiently following the course of
1. building envelope as possible the sun.
Reduce the demand for energy by avoiding waste Heat Solar
pump heat
Shadow
and implementing energy-saving measures water
tank
The energy concept of Green Lighthouse is based on Trias Energetica.
Floor heating Seasonal storage District heating
of heat in the underground.
34 MODEL HOME 2020 VELUX 35Experiment # 2
Daylight in Green Lighthouse
The daylighting performance of Green “Working in daylit environments “Learning in daylit environments
Lighthouse has been specified using the
daylight factor (DF) as performance results in higher productivity.” results in more effective learning”
indicator. Visher 1989 Heschong et al. 1999
The daylight factor is a common and
easy-to-use measure for the available
amount of daylight in a room. It expresses
the percentage of daylight available on an
interior surface compared to that available
at the exterior of the building under known Daylight performance, second floor Daylight performance, first floor Daylight performance, ground floor
overcast sky conditions. The higher the DF,
the more daylight is available in the room. With roof windows With roof windows With roof windows
Rooms with an average DF of 2 % or more
are considered daylit. A room will appear
strongly daylit when the average DF is
above 5 %.
The daylight factor analysis has been per- 4.2 %
formed by COWI using computer simula- 3.0 %
tions in Radiance. The figures on the right
show the daylight factor levels obtained
on each floor for two different variants
evaluating the impact of the installed roof 9.0 % 4.2 %
windows in the final design.
7.8 %
The results comparison shows the positive
effects on the daylight conditions of Green 4.2 %
Lighthouse of adding roof windows. The
Daylight Factor % Daylight Factor % Daylight Factor %
roof windows deliver high levels of daylight 9.0 5.4 % 9.0 9.0
to the second floor’s lounge area, providing 7.8 7.8 7.8
6.6 6.6 6.6
the occupants with a healthy indoor envi- 7.8 %
5.4 5.4 5.4
ronment, strongly daylit, and with contact 4.2 4.2 4.2
3.0 3.0 3.0
to the sky. The use of roof windows also 1.8 1.8 1.8
contributes to raising daylight levels on 0.6 0.6 0.6
the lower floors via the bright atrium
space, and results in a much better day
light distribution over the first floor’s office Without roof windows Without roof windows Without roof windows
area. Daylight invites people on the ground
floor towards the stairway and upper floor
activities.
4.2 %
3.0 %
3.0 %
1.8 %
1.8 %
1.8 %
Daylight Factor % Daylight Factor % Daylight Factor %
9.0 9.0 9.0
7.8 7.8 7.8
6.6 3.0 % 6.6 6.6
1.8 % 5.4 5.4 5.4
4.2 4.2 4.2
3.0 3.0 3.0
1.8 1.8 1.8
0.6 0.6 0.6
36 MODEL HOME 2020 VELUX 37Experiment # 2 Prizes and mentions Nominations
Green Good Design Award 2010 Official Partner Education & Learning
Green Lighthouse won the Green Good De- Green Lighthouse has been endorsed by the Green Lighthouse was nominated among 14
Roof windows Thermal solar energy
sign Award 2010, selected from thousands European Commission’s Sustainable Energy buildings worldwide in the category Educa-
18 safety-laminated triple-glazed centre-pivot roof 22 solar collectors (CLI S08 4000), flex- of submissions from over 46 countries. Europe Campaign as an official partner. tion & Learning at the World Architecture
windows with white polyurethane finish and tubes for solar collectors (ZFR EFO, ZFR The Sustainable Energy Europe Campaign Festival in Barcelona in 2010.
solar window operators (GGU U08 006530) 220, ZFM 015, ZFM 010 and ZFM 005) Honourable mention showcases activities dedicated to energy
18 solar window operators (KSX 100) and thermo sensors (ZPT 1000) Green Lighthouse received an honou- efficiency and renewable energy solutions. Climate Cup Partnership Award
18 flashings for roof windows (EDL U08 0000) 2 modified combi flashings for solar collec- rable mention in the category of Homes Specifically, the focus is on spreading best Green Lighthouse was nominated for the
18 installation sets (BDX U08 2000) tors (special FLA ECX) and Commercial Buildings in Building practice in sustainable energy technology, Climate Cup Partnership Award on the
18 vapour barrier collars (BBX U08 0000L) of the Year 2009, presented by the Da- building alliances and inspiring new energy occasion of the World Climate Solutions
18 solar awning blinds (MSL U08 5060E) nish building trade magazine Building. ideas and actions. conference in 2010. The jury’s motivation
18 solar roller blinds (RSL U08 4070E) was that Green Lighthouse demonstrates
Workman’s access roof window Innovative Cooperation that it is possible to build carbon-neutral
1 safety-laminated triple-glazed top-hung In November 2009, Green Lighthouse won buildings without compromising design,
roof window with white polyurethane the award for Innovative Cooperation pre- comfort and indoor climate.
finish (GTU S08 0073GK) sented by the Confederation of Danish
1 combi flashing for roof window Industry. The award was made for the Danish Light Award
(EKL S08 0021E) unique fashion in which the partners wor- Green Lighthouse was nominated for the
1 installation set (BDX S08 2000) ked together, resulting in a building that Danish Light Award 2010 as one out of
1 vapour barrier collar (BBX S08 0000L) is CO2 neutral, healthy and comfortable. five projects.
Technical Data
The chart shows the technical characteris-
tics of the VELUX roof windows in relation
to heat loss, passive solar gain and daylight.
The heat loss (Uw) of the roof windows is
influenced by the roof pitch. The solar gain
(g-value) and light transmittance (τ) are not
affected by the orientation or roof pitch.
Sun tunnel Roof windows with pane --65 Facts
The primary energy consumption for heating
1 sun tunnel with rigid tunnel Roof pitch 90° 15° (South)
Green Lighthouse has been calculated to
(TLR 014 0124)
Uw (Heat loss U-value window) 1.0 W/m K
2
1.1 W/m2K 30 kWh/m2/year.
1 rigid extension tunnel (ZTR 014 0124)
Ug (Heat loss U-value pane) 0.5 W/m2K 0.7 W/m2K
1 double-glazed roof window with white
g (Solar gain g-value) 0.45 0.45 A combination of the following energy
polyurethane finish (GGU S08 0059)
τ (Light transmittance) 0.67 0.67 sources is expected to supply heating
installed over the sun tunnel
for Green Lighthouse:
1 combi flashing for roof window
External awning blinds MSL 5060
(EKL S08 0021E)
The performance of the window is improved when the awning blind is rolled down. 35 % solar energy from thermal solar
collectors on the roof and storage of
Roof pitch 15° (South)
solar heat in the ground via a heat pump.
Uw (Heat loss U-value) 1.1 W/m2K
g (Solar gain g-value) 0.1 65 % eco-friendly district heating with an
τ (Light transmittance) 0.12 approx. 35 % share of renewable energy.
VELFAC facade windows 90° The heat pump increases the utilisation
Uw (Heat loss U-value window) 0.93 W/m2K of the district heating by some 30 %.
Ug (Heat loss U-value pane) 0.72 W/m2K
g (Solar gain g-value) 0.5 76 m2 of PV solar cells on the roof will cover
the need for base lighting, ventilation and
Outer walls pumps.
U (Heat loss U-value) 0.095 W/m2K
The house is CO2 neutral as to the primary
Roof energy need.
U (Heat loss U-value) 0.084 W/m2K
Floor slab
U (Heat loss U-value) 0.085 W/m2K
38 MODEL HOME 2020 VELUX 39Experiment # 3
VELUX Austria is to build Austria’s first ever
carbon-neutral single-family house under
the name of Sunlighthouse. The vision is to
build a house with exciting and appealing
architecture focusing on the sloping roof.
Grenzgasse 9, 3013 Pressbaum, Austria
The architectural concept was found in a
competition between nine rising Austrian
architectural practices, and the winner is
Hein-Troy Architekten.
Architectural concept
Juri Troy’s architectural design responds per-
fectly to the difficult conditions of the plot:
a very steep and leafy slope in partial shade
facing south-east towards the Vienna woods.
Shadows cast by the nearby mountain have
been countered in the living room by elevated
roof windows, which allow light to fall into
the depths of the room.
The kitchen and dining areas are gathered
around a protected, south-west-facing space.
Windows – both roof and facade windows –
are strategically positioned so as to provide
a particular view while maximising passive
solar energy gains, while also emphasizing
the character of the house. All of these
measures combined make for an unusually
high proportion of daylight.
The project is supported by scientific part-
ners Donau-Universität Krems and the
Institute for Healthy and Ecological Building
(IBO) and has already won the Austrian
State Prize for Environment and Energy
Technologies.
The vision is to build a carbon neutral house with exciting
and appealing architecture focusing on the sloping roof.
The house with an unusually high proportion of daylight has
to be affordable in respect of dimensions and appearance.
40 MODEL HOME 2020 VELUX 41Experiment # 3
Daylight simulation with physical model in daylight Daylight simulation with physical model. Daylight simulation with VELUX Daylight Visualizer 2. Actual daylight conditions in Sunlighthouse.
laboratory performed by Arch. DI Gregor Radinger,
Donau-Universitat Krems.
Daylight
The use of daylight has been maximised to
ensure the health and well-being of the resi-
dents. Donau-Universität Krems evaluated
the daylight conditions in digital form and
in a model under an artificial sky to arrive
at an average daylight factor (according
to DIN 5034-4) of at least 5 % for all living
and working spaces to ensure balanced
daylight levels throughout the two floors
and to minimise the use of artificial light.
The location of the windows was planned
strategically – they give the best view, max-
imum passive solar gain and natural venti-
lation. The total window area is equivalent
to some 36 % of the net floor area.
Daylight visualisations Prizes and mentions
To ensure that Sunlighthouse meets the
expectations in terms of daylight quality, National Award of Environment &
daylight levels are evaluated and defined Energy Technology
through model studies in a light laboratory Sunlighthouse won the Austrian National
and simulations in VELUX Daylight Visualizer Award of Environment & Energy Technology
2, a software tool dedicated to daylighting 2010 in the category “special awards”. The
design and analysis. For more details and award was given for the outstanding inno-
download, visit http://viz.velux.com vative content, the degree of novelty and
market potential and the market position
already achieved.
Fourth prize in Active Architecture
Ground floor First floor Hein-Troy architects won fourth prize for
the project Sunlighthouse in the inter-
Daylight Factor %
8.0 national architecture award 2010 entitled
7.0 Active Architecture organised by Fiandre.
6.0
5.0
4.0 Austrian PR Award
3.0
Project owner: The VELUX Group 2.0
Every year, the Austrian PR association
Architects: Hein-Troy Architekten 1.0 PRVA honours the best three PR cases with
Energy concept: Donau-Universität Krems, the “Best Practice” Award. In March 2011,
Department für Bauen
und Umwelt
VELUX Austria, together with its PR agency
Österreichisches Institut für senft&partner, was awarded for their work
Baubilogie und -Ökologie on promoting VELUX Sunlighthouse.
42 MODEL HOME 2020 VELUX 43Experiment # 3
Energy for
solar cells LED lighting Natural ventilation
Natural (electricity) (stack effect)
ventilation
(stack effect)
Direct
energy
(solar gain
through pane)
Energy
for solar
collectors
(hot water)
Energy design
The prime objective of Sunlighthouse was
to reduce overall energy consumption,
particularly primary energy, to a mini-
mum without sacrificing living comfort.
The features contributing towards a positive
energy balance include a highly efficient
brine/water heat pump, thermal solar Natural ventilation
collectors for the production of hot (stack effect)
water, a PV solar cell system for gen- Hot
erating electricity, and highly energy- water
efficient household appliances. storage
tank
Geothermal
With its PV solar cells, thermal solar col- heat exchanger (brine)
lectors and the brine heat pump, the house
will use renewable energy exclusively.
Compact unit
for comfort ventilation
The payback time of emissions from con-
+ brine/water heat pump
struction, transport to the site, operation
and domestic electricity is 30 years, after
which the house will be carbon neutral.
Ventilation
Net energy balance CO2 balance Intelligent control of windows will be
70
the primary type of ventilation in spring,
In kWh/m²/year
summer and autumn. In winter, this will
be supplemented with mechanical venti-
60 11
In kg CO2 eq/m²/year
Surplus lation with heat recovery. A comfortable
12.2 10
Installation
summer indoor climate will be achieved
Installation
50 electricity 2.5 9 electricity by making use of the stack effect, night
Household
electricity
PV solar cells
23.9 8
cooling and awning blinds on the windows.
40
9.2 No energy is used for cooling.
Installation heat loss Thermal 7 Household
5.1 solar collectors electricity
7.4 6
30 Hot water PV solar cells
10.0 5
4 Installation heat loss
20
Heat pump Hot water
31.7 3
Heating
10 24.0 2
Heating
1
Solar collectors
0 0
Energy Production Energy CO2 emission CO2 compensation
requirement of renewable surplus
energy
The calculation of the energy performance and
production has been made according to national
standards.
44 MODEL HOME 2020 VELUX 45Experiment # 3
Walk-in closet Home office Staircase/corridor Children�s play area
1 low-energy centre-pivot 1 low-energy centre-pivot 2 low-energy centre-pivot 2 low-energy centre-pivot
window with white poly- window with white poly- windows with white poly- windows with white poly-
urethane finish 114 × 118 cm urethane finish 114 × 118 cm urethane finish 114 × 118 cm urethane finish 114 × 118 cm
1 frame extension 1 frame extension 2 frame extensions 2 frame extensions
1 underfelt collar 1 underfelt collar 2 underfelt collars 2 underfelt collars
1 vapour barrier 1 vapour barrier 2 vapour barriers 2 vapour barriers
1 flashings 1 flashings 2 flashings 2 flashings
1 solar window operator 1 solar window operator 2 solar window operators 2 solar window operators
1 solar blackout blind 1 solar blackout blind 2 solar blackout blinds 2 solar blackout blinds
1 solar awning blind 1 solar awning blind 2 solar awning blind 2 solar awning blind
WC
1 low-energy centre-pivot
window with white poly-
urethane finish 114 × 118 cm Children�s room 2
1 frame extension 1 low-energy centre-pivot
1 underfelt collar wooden window, white
1 vapour barrier paint finish 114 × 160 cm
1 flashings 1 low-energy centre-pivot
1 solar window operator wooden window, white
1 solar blackout blind paint finish 114 × 118 cm
1 solar awning blind 2 frame extensions
2 underfelt collars
2 vapour barriers
1 combi flashing
Ground floor First floor 2 solar window operators
2 solar blackout blinds
UG
UG EG
EG OG
OG DD
DD 2 solar awning blind
Thermal solar energy
6 solar collectors (4 114 × 118 cm
and 2 114 × 140 cm) installed
Bathroom with combi flashing incl. flex-
1 low-energy centre-pivot tubes and sealing collars
window with white
polyurethane finish
Figures Roof windows with pane --65
114 × 118 cm
The chart shows the technical characteris- Uw (Heat loss U-value window) 1.1 W/m2K 1 frame extension
tics of the VELUX roof windows in relation Ug (Heat loss U-value pane) 0.7 W/m2K 1 underfelt collar
to heat loss, passive heat gain and daylight. g (Heat gain g-value) 0.48 1 vapour barrier
τ (Light transmittance) 0.68 1 flashings
1 solar window operator
VELFAC facade windows 90° 1 solar blackout blind
Uw (Heat loss U-value window) 0.76 W/m2K 1 solar awning blind
Ug (Heat loss U-value pane) 0.47 W/m2K
g (Heat gain g-value) 0.46 Master bedroom Children�s room 1 Children�s bathroom Living room
Outer walls 1 low-energy centre-pivot 1 low-energy centre-pivot 2 low-energy centre-pivot 3 low-energy centre-pivot
window with white poly- wooden window, white windows with white poly- windows with white poly-
U (Heat loss U-value) 0.13 W/m K2
(395 mm insulation) urethane finish 114 × 118 cm paint finish 114 × 160 cm urethane finish 114 × 140 cm urethane finish 114 × 140 cm
1 frame extension 1 low-energy centre-pivot 2 frame extensions 3 frame extensions
Roof 1 underfelt collar wooden window, white 2 underfelt collars 3 underfelt collars
U (Heat loss U-value) 0.12 W/m2K (540 mm insulation) 1 vapour barrier paint finish 114 × 118 cm 2 vapour barriers 3 vapour barriers
1 flashings 2 frame extensions 1 combi flashing 1 combi flashing
Floor slab 1 solar window operator 2 underfelt collars 2 solar window operators 3 solar window operators
U (Heat loss U-value) 0.12 W/m2K (500 mm insulation) 1 solar blackout blind 2 vapour barriers 2 solar blackout blinds 3 solar blinds
1 solar awning blind 1 combi flashing 2 solar awning blind 3 solar awning blinds
Fenestration 2 solar window operators
2 solar blackout blinds
Glass area 72 m2
2 solar awning blind
Net floor area 201 m2
The glass area is equivalent to 36 % of the net floor area.
46 MODEL HOME 2020 VELUX 47You can also read
