We moved into our home last spring. It's pretty new and seems well-insulated in winter. But it was hot last summer, so we had to run the A/C a lot, and the electric bills were a killer. Do you have any tips on how we can cool our home this summer without going broke?
We've discussed some of the easiest ways to make your home more efficient, like reducing solar gains, insulating and ventilating the attic, and sealing air leaks. You may need to focus on inefficiencies in your home's cooling system. But before we address that, let's look at some other potential problems:
If you have central air conditioning (A/C) or a heat pump, make sure your filter has been changed or recently cleaned. The next step is to call an HVAC contractor for a tune-up and a complete assessment of the system.
A tune-up can improve the efficiency and extend the life of the unit. The tune-up includes cleaning the condenser coil, a check of the refrigerant levels and a good look at the pump and electrical contacts. Talk to the contractor about the efficiency of the A/C unit. If it's old, it may be cost-effective to replace it, even if it's still functional.
Ductwork is equally important as the A/C unit, so make sure the contractor you choose is capable and willing to provide an expert assessment. A real pro will know how to measure the air flow at each supply and return register. If you're not getting cool air to the rooms that need it, the contractor may be able to make modifications to the ductwork.
Leaky ductwork could be your problem. If the ducts are in unconditioned areas like a crawl space or attic, it's especially important to make sure they're sealed and insulated. It will also help to seal ducts that are in conditioned spaces.
Some HVAC contractors can do a duct-blaster test to measure duct leakage. Discuss whether you should ever close any supply registers. Most experts recommend that supply registers are always open.
If you cool your home with window A/C units, there are a few things you can do to maximize your cooling while keeping costs as low as possible.
Of course, the simplest way to save money on your A/C is to not use it. As much as possible, keep your activities limited to rooms that are easily cooled. Try to spend more time cooking and eating outside. If you have a basement, think about setting up a second bedroom down there where it's cooler. Think of it as your new summer hideaway!