The absorption/dessicant dehumidifiers like the Ruby Dry work extremely well at lower temperatures. I and others have used them in our trailers for many years over the Scottish winter with no problems at all. With the automatic setting of the Ruby Dry set to its highest humidity setting of 60% the trailer interior and contents feel bone dry even in sub zero temperatures.. Humidity measurements in my trailer generally show levels well below 60%.. It helps to seal the trailer as much as possible and to fit the optional tube to allow the water to drain through a hole in the floor.

They do use more electricity than old fashioned compressor types but the difference is minor compared to the cost of gliding. They produce some heated air from the small heating element that is used to dry the absorbtion disc as it spins.