The RF90TW is a single speed, 100mm duct, recessed centrifugal fan. Suitable for duct runs up to 10m long. It also comes with integral back draught shutter.
This is the 'TW' model which is a single speed fan operated via a light switch or pull cord and has an integral overrun timer. The overrun timer can be set to continue running for up to 30 minutes following switch off to ensure the room is ventilated.
The R90TW replaces the R90T. So if you have a R90T then this fan is its direct replacement and it will fit in the same space as your existing product and ducting.
The R90 range has been in production since the 1990's so the quality and durability of the fan has been proven and has stood the test of time.