This is a direct replacement for Greenwood Airvac model number R90B, which is now out of production. It fits the same ceiling box. The RF90 is a high-performance centrifugal extractor fan for installation in bathrooms and WCs. This is the standard model (no timer) for simple switching on/off from the switch controlling it and requires only live + neutral connections. It is suitable for wall or ceiling mounting and has an integral filter which can be removed and washed. It offers an extract rate of 21 litres per second, 75m3 per hour. The sound pressure is 41db(A)@ 3m. Dimensions are 240mm wide x 215mm high x 43mm deep (beyond installed surface). The exhaust is 100mm. Weight: 3.53 pounds, Manufacturer: Greenwood Airvac