Heat recovery ventilation has been widely used already for several years. Air exchange takes place without losing thermal energy, namely, outgoing warm air masses warm up (in winter – cool down) incoming ones, giving away their heat.

This technology makes it possible to recover up to 90% of the thermal energy that is conveyed through the ventilation shafts together with the used air.

The two most common types of recovery equipment: using a plate heat exchanger and a rotary heat exchanger.