Single-flow air extraction system with outside air introduction. Type 4

• This installation is combined with a heat recovery system.
• The recovered heat is also used to heat domestic water or the heating of the air supplied via a heat pump.
• The facilities are equipped with an air-to-air or air-water heat pump.

• All work living rooms or bedrooms of the building as well as toilet blocks must be ventilated mechanically.

• Despite the simple concept, careful study needed.