We have to buy a window unit for our house. We have Central AC but it’s not keeping up and we can’t afford to upsize it right now. So until then I’m researching which window units to buy. Any advice or anything to cut through all the marketing spam and AI copy that I have to wade thru?
It’s probably not undersized. You might have a duct leak, insulation gap, air gaps, etc.
You might have rebates in your area that pay for some of these things. One inexpensive thing you can do is run reflectrex across your roof rafters. While you’re up there air seal any gaps into the living space like can lights and hvac vents.
You can also seal your windows with plastic.
You can get a flir camera for your phone to see where the heat is coming in the most.