How do you lower humidity in homes in winter?

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How do you lower winter indoor humidity in a home in Guelph, ON?

Gary Luck May 26, 2021Last updated: June 4, 2021

Our winter house humidity here in Guelph, ON is between 30 - 40 % RH. We have awhole house dehumidifier. in 2020 we had new doors installed. When it hits -10 or colder the doors get ice buildupon the outer edges aand can freeze shut. Why? and what more can we do to lower humidity?

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