Heat recovery from ventilation air
In large buildings such as swimming pools, (part of) the indoor air is continuously renewed, with the moist, dirty air being vented out. A heat recovery system ensures that the heat from the air on its way out is transferred to the fresh air on its way in. By using the HR, the heat can be reused to pre-heat the fresh air or the fresh water for the swimming pool.
Heat recovery from rinse water used by swimming pool systems
Swimming pool water (rinse water) that has been used to clean dirty filters is drained into a buffer tank. A heat exchanger is installed in or near the buffer tank, and the cold fresh water passes through it to be pre-heated. The heating system then heats the extra water to the desired temperature. With this form of HR, the gas consumption of the heating system can be cut.