New large buildings are well insulated and the required heating capacity is becoming increasingly less. Especially in these well insulated buildings it is crucial to have a low stratification of the air (temperature difference between roof and floor). The lower the difference the less the energy loss of the building and the lower the energy bill. In general WCU units can save easily approx . 30 % of the energy used.

WCU units are controlled independently of the air heaters. They have their own built-in thermostat.