Heat transfer through windows is huge, since they don’t have the insulation of walls and ceiling, and heat transfer is the biggest enemy of cooling
I used to have to drive 2 hours a day, 5 days a week, so I got into something called hyper-miling. Basically it means using every trick in the book to get the most mileage out of every gallon of gas. If your car gets 20 miles to the gallon, you try to get 25. In my case, I almost doubled the mileage my car was supposed to get, although it really did take a lot of effort on my part. Since the lockdown started, I’m not driving anywhere. While I don’t miss it, I do miss hyper-miling, for some reason, so I have turned that focus to my HVAC system. It is hot this time of year, deadly hot, and since I’m home all the time I run my AC way more than I ever have before. Now I am doing an HVAC version of hyper-miling, trying to get every last bit of cooling I can for the least amount of money. First of all I close my blinds and put up curtains over the top of the blinds to trap the cooling inside. Heat transfer through windows is huge, since they don’t have the insulation of walls and ceiling, and heat transfer is the biggest enemy of cooling. Sometimes I will hole up in my room, and close off the air vents to the rest of the house so all the cooling is channeled in here with me. This works well for short bursts, but I am told doing that can be bad for the HVAC system over time.