Cold air cannot enter through the window nor improve glazing spacers to cool the inside surface. Options of low-e glass keep the insider surface warmer, which reduces the opportunity for condensation.
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Condensation is the result of the air being saturated with too much humidity or water vapor. When this happens, the air cannot hold the excess humidity, and gets rid of it by converting gases back to droplets on cool surfaces.
Windows typically are the coldest object in the house in wintertime. Room side condensation is caused by excess humidity in your home.
The bottom of the window is the coldest part. Cold air sinks.
The air near the top is warmest and holds most of that moisture.
Windows themselves do not cause condensation, but they are an indicator that humidity levels are too high. High humidity can cause serious moisture problems in a home and should be corrected. Keep in mind that new homes release moisture from new construction materials through several heating and cooling seasons. Newer, "tighter" homes trap humid air inside; older drafty homes allow exchange of drier outside air with inside more humid air.
Reduce humidity.
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