Quote:
Originally Posted by Vinny01
I only have AC for the upstairs and we set it to 19 on these hot days so it cools down most of the house and also keeps bedrooms cool at night.
The last home I lived in only had a single furnace and it worked great on the main floor but it was still super hot upstairs which was really annoying.
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Broken record time for me, but at your last house did you close all the vents on the main floor to direct the cold air upstairs? That's mandatory with AC since cold air flows down and hot air goes up. You need to cool from the top down.