This line of Renovent Excellent MVHR units is energy efficient thanks to the application of switched power supply, low internal resistance and fans with backward-curved blades. In addition, the low internal resistance and large fan diameter ensure that the heat recovery system is very quiet. Unique is that manufacturer Brink Climate Systems has implemented their Renovent Excellent 300 with the Constant Flow principle. With this MVHR unit from Brink you get the best quality!