Inside a Vents heat recovery unit: exchanger, G4 and F7 filters

Photo: Mariusz Młynarczyk / CloudAir.tech

Close view into an opened Vents heat recovery unit, showing the counterflow plate heat exchanger, a centrifugal fan, a G4 panel filter and a pink F7 bag filter. A wall controller sits on top, with leaflets pointing to vents-group.pl behind.