What level of humidity should you keep a house at in winter?


Should our HRV keep our humidity lower than 40%, even in the cold months?

Kim Clement Feb. 8, 2021Last updated: Feb. 11, 2021

We are sitting at about -30C and ice is builidng up on almost all the windows. The humidty is registering at 40% on all levels, even though the HRV is set to Max. Is it possible that it is not functioning properly? Thanks in advance!

Responses (5)

Kim Clement
Kim Clement Feb. 11, 2021, 12:11 p.m.

Thank you very much! We are in Edmonton, Alberta which is 7A. Perhaps we should just get a dehumidifier?

Emmanuel Cosgrove
Emmanuel Cosgrove Feb. 11, 2021, 12:50 p.m.

I Just looked at some Edmonton charts, it says December, January and February are the most humid months of the year with an outdoor air average of about 60%RH. So yes on the dehumifier, and maybe you're running your HRV too much.  An HRV is to bring fresh air in for occupants and to remove humidity, so in your case it's not helping with the humidity, so as long as the air isn't seeming stale I'd cut it back a bit, maybe to whatever you would normally do if you weren't running it full time. 

Kim Clement
Kim Clement Feb. 12, 2021, 11:48 a.m.

Thank you, that's a wonderful idea. I will turn it back to minimum and see how we do. 

Emmanuel Cosgrove
Emmanuel Cosgrove Feb. 15, 2021, 10:45 a.m.

Hopefully that works Kim. If if does please let us know. Good luck!