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The Atika concept is an example for low-energy housing that can be built with existing products, using the design of the building to optimise its energy performance.
Atika's special feature is the roof with different slopes, where windows and solar panels are placed strategically depending on the different slope angles of the roof.
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Solar energy for heating and cooling
Atika has an innovative system, with the VELUX solar collectors supplying energy not only for heating but also for cooling purposes.
They can accumulate about 70% of the hot water supply and up to 30% of the energy for space heating. When cooling is needed, the solar collectors provide energy for the houses's air conditioning system.
Eleven VELUX solar collectors, with a total surface of approximately 10 m2, are installed in south-facing roof slopes, with angles varying between 15º and 60º. A misture of glycol and water circulates through the solar collectors.
Glycol is an antifreeze fluid that eliminates the problem of ice in the system and burst pipes. The glycol flows in a closed loop system from the collectors into the 700-litre accumulation tank, which is hereby heated up to a maximum of 90ºC.
An additional source of heat, an electrically poered boiler, supports the production of fot water. |
Products
The VELUX products released in the Atika project have been chosen from a marketing
and a technical point of view, focusing on how they can contribute to comfortable
indoor conditions in the souther European climate.
Windows
Wooden windows in Nordic pine and fullcast polyurethane windows with wooden
core (EVERfinish). Models GPL, VFE, GGL and GGU. Top-hung, buttom-hung and
pivot-hung versions.
The windows in the roof are models GGU and GGL INTEGRA®, electrically operated
with integral rain sensor and remote control. The vertical windows, model VFE, in
the facades are equipped with restrictor locks for security reasons.
Solar collectors
Model CLI M08 (78 x 140 cm) for hot water supply and the solar cooling system.
Collector surface: 0.89 m2
Total collector area: 9.79 m2
Sun screening
Exterior sun screening roller shutters and awning blinds, electrically operated.
Models SML and MML.
Exterior sun screening awning blinds. Manually operated. Model MIE.
Interior sun screening blackout blinds. Manually operated. Model DML.
Operating systyem
io-homecontrol®
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