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Old 2020-06-05, 12:42 PM
homie27 homie27 is offline
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Default basement cold in winter and freezing in summer

Hi all, my basement is cold enough in the winter, in the summer is freezing. is it a bad idea to close all the vents in the basement in the summer?
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Old 2020-06-05, 03:13 PM
oakvillehomeowner oakvillehomeowner is offline
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you have too much a/c supply and not enough return.

have an hvac contractor extend your air return line down to the floor level and that will help in the winter. it's not hard - should be a couple of hours max.

in the summer, close the vents as long as it doesn't result in a freeze up in your a/c coil due to lack of airflow. replace your filter and open all of the vents on the main and second floors.
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Old 2020-06-05, 04:54 PM
homie27 homie27 is offline
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roughly how long would it take to freeze the ac coil if that were to happen? is this something that would take hours, days or weeks if we keep the vents in the basement closed all summer?
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Old 2020-06-08, 02:51 PM
oakvillehomeowner oakvillehomeowner is offline
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you would notice it in a few hours. the velocity of air through the vents would be reduced, and you would have very little to no condensation running through your condensate drain. the a/c might even sound louder, and you'd likely see frost on the suction line (larger of the two copper lines).
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Old 2020-06-08, 05:40 PM
homie27 homie27 is offline
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Quote:
Originally Posted by oakvillehomeowner View Post
you would notice it in a few hours. the velocity of air through the vents would be reduced, and you would have very little to no condensation running through your condensate drain. the a/c might even sound louder, and you'd likely see frost on the suction line (larger of the two copper lines).
ok thanks for the info
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Old 2020-06-12, 10:23 AM
Halton Home Inspector Halton Home Inspector is offline
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Sure, close most of the basement registers / vents. But leave at least one open to move air in the basement.

Good advice above re the basement air return. Locate it and make sure it is open.
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