In Summer, air conditioning can account for a lot of your home’s electricity costs. In some cases, during the summer, energy bills will double because of the A/C use. To combat these outrageous energy prices, people in some areas will switch to the APS and SRP time of use plan. On this plan most will only do laundry at night and will set the thermostat up during the day. Here are seven ways you can save on A/C costs without spending thousands of dollars upgrading your A/C unit to a high efficiency unit.
Leave your doors open
Your interior doors of course! Don't close your vents and doors. You want all the interior doors open or at least cracked to help circulate air back to the return.
Seal the ductwork
Often homes are lose between 20% and 30% of their conditioned air in their attic. If 60% of your energy bill is coming from your use of A/C in the summer and 20% of your conditioned air isn’t making in to the actual rooms then you can see how that can add up to quite a bit- especially over 5 years!
Some HVAC contractors don’t seal the ductwork on new, high efficiency air conditioners which is like driving a Prius with a hole in the gas tank. Sealing your HVAC ductwork not only saves money on your heating and cooling bills, it brings less dust in the home too.
Air seal your home
Sealing your home, especially around exterior doors, electrical and plumbing penetrations, and recessed canned lights will keep your conditioned air inside and the outside air outside. Chances are, when your house was built, the builder ran wires and plumbing plates through holes in the wall that are much bigger than the wires themselves. That extra space around the wires can let your expensive, air-conditioned air leak outside—and invite hot, summer air inside. This leads to heat gain quickly and makes your A/C unit work harder and more often.
Install shade screens
Shade screens block up to 90% of the sun’s conductive heat while still allowing sunlight in. Windows account from more than half of your homes heat gain because they have no insulation value and are (obviously) transparent.
If you’ve been holding back on shade screens because you don’t like the way they look, shop around! There are a lot of discrete designs that are coming out. Or, take them off in the winter! Shade screens are typically clipped onto the frame and can be very easily removed after the summer is over.
Increase your insulation R-value
Are you even surprised that attics get really hot during the summer? The temperature difference between the attic and the house can be a major contributor to high A/C costs. Having the insulation up to R-38 can protect your home from taking on the heat from your attic and make sure it’s not taking a toll on your bill.
Make sure there’s no connection between your garage and your house
This is one of the lesser known causes of high energy bills and is surprisingly common. Like the attic, the garage gets very hot during the summer. Temperature differences is one of the main drivers of heat gain and having a direct connection to that is like filling a pool with a slash in the liner.
Annual A/C unit tune up
Make sure the tune up is done by a trusted, experienced, and reliable contractor.
Here’s an easy test that you can do yourself to see if you’re paying too much for your A/C. With the A/C on, close a bedroom door. Place your hand under the door to see if you can feel air coming out of the room. If you feel air coming out then your room pressures are unbalanced and you are probably paying too much for your A/C. Have a Home Energy Auditor do a home performance assessment to actually measure the pressure in each room to determine if correction is needed.