Double glazing refers to a type of window that uses two sheets of glass to reduce moisture condensation, keep heat inside, and keep noise from entering your home. Despite being better designed to deal with moisture condensation than regular windows, double glazed windows may still collect condensation. Fortunately, there are ways to remove condensation and prevent it from reoccurring.
Place an open container of a moisture absorbing chemicals under the window. According to the University of Missouri Extension Service, chemicals that absorb moisture include silica gel, activated alumina, and molecular sieves. Unfortunately, there chemicals are unlikely to be found at most home supply stores and thus you will have to contact your local high school or college science department, or an industrial chemical supply store. (see reference 2)
Remove moisture from the air and the surfaces of your home by running a dehumidifier in the winter and an air conditioner in the summer. Consider purchasing a humidistat at your local hardware store to keep track of the relative humidity in your home.
Provide the window with heat. Heating the warm side of the window (the side facing the inside of your home) can help get rid of condensation. Radiant ceiling panels can help warm the tops of tall or high windows, whereas baseboard convective heaters or even a space heater can help warm windows that are not too high on your ceiling.
Fix cracks. Cracks in the glass of your double glazed windows will lead to condensation. By repairing ore replacing the glass you can remove the condensation.
Run a fan or install an exhaust fan. Circulation will help remove and prevent condensation. This is particularly important if the window is located in a room that is prone to high moisture levels, such as a laundry room, bathroom, or attic.
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