When it’s hot outside, setting your HVAC thermostat to a drastically cooler temperature can cause your utility bills to be higher. Setting your thermostat at a more moderate temperature could ease the work that your system needs to do to cool your home. “However, if you have an older system that cannot maintain a reasonable set point, say 75 degrees F on a 90-degree day, it may be time to have it checked to see if it is performing correctly before considering whether to have it replaced,” says Tim Storm, senior product manager for Trane.
Storm also recommends upgrading a system that is more than 10 years old or has a SEER rating of 10 or less. “Newer systems with SEER ratings of between 14 and 23 provide energy saving features that can lessen the monthly bill and speed up the return on your investment,” Storm explains.
It’s important to keep an eye on how long your HVAC needs to run. “If your system seems to never cut off, it could be time to replace it,” explains Tommy Dutton, Franchise Consultant at Aire Serv.
Dutton agrees that 10 years is a good time to replace it, since the HVAC is out of warranty. “If your warranty has expired, Murphy’s Law can kick in at any time and problems always seem surface at the worst possible time like overnight, during the weekends, when you have company over, or as you’re gearing up to go out of town.”
When your system never cuts off, you’re paying more money to the utility company. This money could be better spent on a more comfortable, high efficiency system, Dutton says.