KLS ASSOS Rotary Heat Recover Units are designed to ensure fresh air needs of the buildings. It lowers heat loads caused by fresh air with using recovered heat inside the exhaust air. KLS ASOS is fully compile with ErP ECODESIGN regulations with its high efficiency alluminium heat wheel and with its optionally prefered sorption rotor, it can make also sensible and latent heat transfer with advanced level of efficiency. ASSOS operates fully automatic and Plug&Play. High efficiency EC fans are used for air circulation and if prefered, can be produced with an integrated last heater or cooler coil.