Airflow BV400 Ventilation Unit filter 2 x G4 material 90000322 over-100 So if you have a

So if you have a S90T then this fan is its direct replacement and it will fit in the same space as your existing product and ducting

The RF90BW is a single speed

Left or right hand configuration through software alone

the delayed timer function

the fan has 6 adjustable speed settings which are used to ensure that whatever location the fan is fitted - wall

Airflow BV400 Ventilation Unit filter 2 x G4 material 90000322 over-100 So if you have aAirflow BV400 filter 2 x G4 material 90000322 This is a pair of courser grade G4 filters designed to prevent particles, insects and other airborne debris from entering the home. F7 fine filters, used to catch small and often invisible particles such as pollen spore bacterium and dust are also available see model reference 90000323