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Case

Energy efficiency in buildings

Smart buildings

Solar thermal energy

Energy Plus house

2. July 2009

Solution provider

VELUX

For more than 80 years, the VELUX Group has created better indoor environments by bringing daylight and fresh air into homes and other buildings all over the world. The VELUX Group was founded in Denmark and is today an international company with a presence in 37 countries.

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Lots of daylight and energy savings
Energy Plus is a modern single-family house with a very low energy consumption.

This environmental friendly house with a comfortable planning for a family of four also has a healthy indoor climate, optimum daylight conditions and functional illumination.

Window frames, linings, flooring and walls, all finished in light colours, will make the daylight reflect into the interior; and daylight intakes at different levels and from different directions will create many different ‘light zones’ in the living areas.

Energy and heating
With VELUX solar panels, natural ventilation through roof windows and floor heating the house is a holistic solution in contemporary energy-balanced architecture.
 
Sunlight through the south-faced windows contributes to the heating of the house and lets the residents benefit directly from this natural resource of passive solar energy. To go a step further in the use of solar energy, solar panels are installed to produce hot water for the household. The thermal solar panels are put to full use as the 650 saddle roof is facing south/west.

The energy qualities of the house combined with the excellent daylight conditions and the good indoor climate makes the house a fine example of sustainable living

Ventilation
The combination of intake of fresh air through windows at ground level and the highly placed roof windows where the exhaust air is let out, results in effective ventilation of the living areas on both floors of the house. To avoid uncomfortably high temperatures during summer and the need for air conditioning, external solar shading should be used on windows facing south. The house is well insulated and airtight. This makes natural ventilation sufficient during the summer season, and in winter time a combination of mechanical ventilation and heat recovery contributes to the low energy consumption

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