The Zehnder ComfoFond-L ECO subsoil heat exchanger is designed to complement Zehnder heat recovery units.
The sub-soil heat exchanger uses the almost constant annual temperature of the earth at a depth of 1/1.5m. This store of energy stays at a temperature of 8 – 12 oC all year round and can be utilised to pre-cool or pre-heat incoming supply of air in summer and winter months.
When connected to a Zehnder ComfoAir 350/550 Luxe Systems it increases the comfort of the supply air to the dwelling throughout the year, even when the temperature fails below zero. This can help improve the efficiency of the heat recovery units as the incoming air requires less energy to meet the desired comfort temperature. By saving energy and providing an optimised indoor climate, benefits are felt by the building the homeowner and the environment.
Features and Benefits