Efficient heat recovery
An air-to-air heat exchange ventilation system is the usual choice for newbuild installations, owing to its enhanced energy efficiency and indoor climate as compared with a ventilation system based only on extract air. The pre-heated supply air reduces the risk of draughts and of supply air and extract air diffusers clogging up, which can cause noise and flow problems for the entire ventilation system.
The fire protection in an air-to-air heat exchange ventilation system is typically achieved from fans. As a fan in the operational solution, an air handling unit is used with a fire bypass across the unit’s filters and exchangers. Alternatively, mechanical fire protection solutions can be installed in each flat. This requires less space, as the need to fire-insulate the ducts is reduced, since no fire bypass across the unit is needed.
- Balanced ventilation
- Reduced risk of draughts and noise
- Several heat exchange options
- Guaranteed indoor climate
- Efficient heat recovery
- Costlier to install than an extract-air-only system
- More space-intensive than an extract-air-only system
- Risk of transferral between flats