A window letting in the hot sun won’t just heat up your thermostat, it’ll heat you up too. During the warmest part of the day, close your window blinds and keep out the sun. It can also help insulate your windows, which stops the cold air from escaping.
If your home isn’t brand new, the cold air inside it is probably seeping out into the neighborhood through worn door and window seals, a poorly insulated attic and other sneaky cracks.
To see how well your home is holding in the cold, sign up for a home energy audit with your utility provider or a local contractor. A certified home energy rater or auditor will check your home for leaks and recommend the best way to make your home more energy efficient.
Don’t want to spring for an audit? Do a miniaudit yourself. Stand outside your home and run your hand along windows and doors. Can you feel the cold air escaping? If you do, caulk around leaky windows and add insulation around doors.
Make sure your thermostat is on the right wall
Thermostat placement can play a big part in how well your air conditioner works. If you put it on a wall right next to a hot window, for instance, your air conditioner will kick on much more often than it needs to because it will think the room is hotter than it actually is. Here’s how to pick the perfect wall for your thermostat.