How can a seemingly average heat recovery rate (such as 76%) mark an extremely effective and energy saving ventilation device?
The heat recovery rate in itself is not as important as the electric efficiency rate, which shows the relation between power consumption of the device, with regard to all electrical auxiliaries (e.g. also the control). With M-WRG we are talking about 73% heat recovery rate and power consumption (with all auxiliaries) for two energy saving EC-DC motors of 5,2 W (permanent operation in the recommended air volume current of 30 m3/h included). This results in a electrical efficiency rate of 21 (proven by TUVtesting). This means that one portion of electrical energy recovers 21 portions of heating energy. The rule is basically as follows: The higher the electrical efficiency rate the better is the efficiency of the system.
