My home was built in 2014, tight construction, top of the line windows, with an HRV (heat-recovery ventilation unit to control humidity). I was having problems with window condensation on the lower inch or two of the glass on cold mornings when temps were 20 degrees or below outside. I ordered Indow inserts for 13 of the worst windows, and now there is ZERO condensation no matter how cold it gets outside....perfect. I will be ordering some more next fall for the other windows. They were easy to install and fit great.
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