Controlling Home Moisture for Indoor Air Quality
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Due to condensation problems on windows we cannot generally maintain humidity levels of 40% to 60% during the winter. When it is 0º F outside, the temperature on the inside glass surface of a double-glazed window will be about 43º F. When room air at 70º F and 40% relative humidity is cooled to 43º F at the window surface, the air relative humidity near the glass surface will be about 100% and condensation will be forming on the glass surface.