Backdraft Damper Recommendation

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jm3

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Master Geek
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#298890 25-Jul-2022 09:24

When we have strong wind our bathroom extract is allowing air to flow back into the house. So I want to put a backdraft damper in, it's 150mm duct.

I've seen plastic, metal, spring loaded. Any recommendations? Any that are more likely to fail?

https://www.mitre10.co.nz/shop/non-branded-inline-backdraft-flap-150mm-white/p/187737

https://www.plumbingplus.co.nz/products/manrose-pvc-inline-backdraught-shutters/

https://thelightingoutlet.co.nz/products/backdraft-damper-spring-loaded-in-100-125-150-200-250-315mm-fantech-trade-rsk

RunningMan

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#2946127 25-Jul-2022 09:27

I'd reccomend replacing the fan with one that has mechanical shutters that close when not being used. Those backdraft things often seem to rattle as they bounce in the wind which can get annoying all the time.

jm3

87 posts

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#2946134 25-Jul-2022 09:48

Thanks. I'll check that out as an option too.

Rust

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#2946138 25-Jul-2022 10:19

RunningMan:

I'd reccomend replacing the fan with one that has mechanical shutters that close when not being used. Those backdraft things often seem to rattle as they bounce in the wind which can get annoying all the time.

This.

I have one in a rangehood and it drives me nuts.