Blauberg UK Freshbox Single Room Heat Recovery Ventilation Wall Fan Unit Supply & Extract Air – WiFi & Pre-Heater

The unit is equipped with supply and exhaust air dampers which activate automatically to prevent drafts while the unit is off.Supply air cleaning is provided by the G4 and F8 filters. To meet more stringent air purity requirements the F8 filter can be replaced with an H13 Filter (purchased separately). Exhaust air is cleaned by the panel filter G4.OPERATING PRINCIPLE.The cold outdoor air passes through the filters and the heat exchanger and then is delivered to the serviced space by the supply centrifugal fan.Warm stale air from indoors passes through the filter and the heat exchanger and is discharged outdoors by the centrifugal fan.The supply and exhaust air flows are fully separated which helps eliminate the possibility of odour or microbial transfer between the streams.