SunAir Balcony

Ventilation heat recuperation system for buildings

SunAir Balcony wants to combine three innovative high-tech elements into one building heating/cooling and ventilation system:

  1. Solar collector integrated in façade or balcony balustrade
  2. Heat exchanger in which the used air is recovered
  3. Sensor-steered computer configured to optimise both

Due to increased awareness of the need for energy savings in the built environment, more and more attention is given to the construction of low-energy buildings or to the implementation of energy saving measures in renovation projects. To save energy most buildings invest heavily in insulation and in measures to reduce unintended leakage of warm air from the buildings. In order to avoid air quality problems, fungus, … it is necessary to combine these measures with forced ventilation. Insulation nowadays has become so good that of all energy lost by a house, 80% flows away through the ventilation system. It speaks for itself, that if we can recover this energy  for heating, the building would use even less energy.

EnerSearch has developed a very innovative and both technically and commercially interesting solution for this problem, brought to the market as SunAir. SunAir extracts the heat from ventilated air leaving the building, and employs it to warm the air entering the building (principle of heat recovery). In addition, a solar collector is subjoined to provide the energy required for keeping the comfort levels in the building. This solar collector preheats the incoming air and is mounted in the facade or into balconies. During the night these collectors can be also used for cooling the air.

The Sunair Balcony project focuses on the development and optimisation of a SunAir system integrated into a glass balcony. The system is currently sold in custom projects, but the production is still too complex and expensive for a large scale market implementation.

Overall Status

Feasability Study

Project Consortium

Project Coordination

EnerSearch Solar: Luc Hamilton


Product: SunAir Balcony

SunAir extracts the heat from ventilated air leaving the building, and employs it to warm the air entering the building (principle of heat recovery). In addition, a solar collector is subjoined to provide the energy required for keeping the comfort levels in the building.