Cold Air Entering Through Vents

June 9, 2009 | Filed under: Home Ventilation, Misc, Roofing Answers

Len from Canada asks:
Q: We have just moved into a new home and the draft coming through the fans in the bathroom and kitchen fan is terrible. I have new vent covers placed on the eaves through, but still the cold air is entering the fan. We get a lot of wind so the air is still being forced through I guess. Was wondering if you had any ideas has to how I could stop the draft as if makes our electricity bill very high in the winter time.

A: I am not sure what sort of vent hood or cover you have on these where they exit through your roof (or wherever they exit) but what you want to have is a dampered vent. The damper opens up so that the forced air from the fan can exit but it does not allow cold air from outside to come back in. With some newer fans, there is also an additional damper down at the fan itself.

todd Miller

has spent his entire career in the metal building products manufacturing industry. He is president of Isaiah Industries, an organization recognized as one of the world’s leading metal roofing manufacturers. Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Through his website, he strives to raise the bar on standards and practices to provide property owners with the best possible products for successful roofing projects.

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