We live in Denver and have an evaporative cooler on our roof. We have winterized it by draining the basin and covering the unit. I cut thick insulation to push up into the shaft above the register. We also have a humidifier on our gas heater. During this recent cold (10 degrees F) spell we have had condensation in the shaft which leads to water leaking from the register onto our floor. I realize I need to do a better job of sealing off the cavity so warm air doesn't get into the shaft - do you have any tips on how best to temporarily seal so that I won't have a mess undoing my work in the spring?
Cold Air returns in the up stairs of my 1910 2 story...
Insulation in the basement
Two story House with Cold Upstairs in the winter,
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