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Noticed we have cold air coming down the vent when it's not on, is this to do with the holes at the sides or possibly some other cause? : r/homeimprovementideas
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Prevent cold air from entering through home exhaust fan ducting using back draught shutter - YouTube
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Panasonic FV-0511VF1 WhisperFit DC Fan 50-80-110 CFM Retrofit Bathroom Exhaust Fan - Quiet Energy Star-Certified Energy-Saving Bathroom Ceiling Fan - Amazon.com
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