Fantronix WISPA Light Switch Activated, Humidity sensor and Timer Bathroom Extractor Fan 150x150x23mm External Size, 100mm / 4 inch diameter vent. Energy efficient and Long Lasting Motor White

You will need Switched Live, permanent Live and Neutral mains voltage connection. Powers on with your light switch. Humidity sensor can be set between 60% and 90% relative humidity. The fan will run until the humidity is below the set percentage, after which the Run-on-Timer will run between 2 and 30 minutes. High airflow while maintaining a low noise level of 29 dBA. Can be wall or ceiling mounted. A backdraft shutter is preinstalled to prevent contaminants from entering the house. Fascia measures 150 x 150mm and has a slim profile of only 23mm. The connector is 99mm diameter (for 100mm hole/duct) and extends 79mm into the wall. Powered by a durable, low-energy motor, offering an extraction rate of 90 m³/hour (25 l/s). Complies with Building Regulations Part F and L. Can be wall or ceiling mounted. The fan is equipped with a backdraft damper to prevent back flow and heat losses., Weight: 2.20462262 Pounds, Manufacturer: Fantronix