Bathroom ventilation and motorised back draft damper Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[Sudbury Steve]

This is my first post so please be gentle, I am a very experienced DIYer and an electrical engineer by trade. I am completly re- plumbing my bathroom. I want to fit a motorised back draft damper into the extractor fan ducting so when the fan is on the damper is open and when its off its closed so I don't have a 110mm hole from outside to in just relying on the fan impeller to stop the cold. I am struggling to find such a bit of kit.I think it needs to be volts on open and volts off spring closed. Please dont suggest any type of just mechanical damper, I have some of those and they just rattle when its windy

[stoneyboy]

Hi Sudbury Steve,
Possibly easiest and cheapest to buy an extractor with an inbuilt shutter system and use this. There are lots on the market.
Regards S