The double facade is an extra skin around the building giving a cavity between the inner and outer facade. This cavity can be used for the control of the indoor climate. In winter solar energy absorbed by the blinds in the cavity and the heat losses through the internal facade can be used to preheat the ventilation air and can then be compared with the heat recovery unit in a mechanical ventilation system. In summer solar heat gains can be reduced by the effective sunshading system in the cavity. Then unwanted solar radiation is removed by natural ventilation in the cavity.
Developed by Conserval Engineering of Toronto, Canada, the Solarwall™ is a solar system for heating ventilation air for buildings. The Solarwall looks like conventional metal cladding, but performs like a solar panel.Matrix Energy Inc. of Montreal, in partnership with Conserval, installed the Solarwall system at Bombardier's Canadair facility in Montreal, Quebec. The installation paid for itself in energy savings in just 1.7 years, and allowed the company to stop using fossil fuels, with their associated emissions.
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