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Find Out How a Variable-Speed Furnace Works

Find Out How a Variable-Speed Furnace Works

Why settle for outdated, on/off heating when new variable-speed furnace technology excels in both comfort and energy efficiency? You may not realize it, but if you’re heating with gas like most Oklahomans, the cost of the electricity to operate the forced-air furnace blower is a major contributor to your heating expenses. Most installed furnaces incorporate a blower with a PSC (permanent split capacitor) motor. It’s an old-school energy hog and only operates at two speeds: on and off. A variable-speed furnace blower incorporates ECM (electronically commutated motor) technology programmed to circulate air continuously across a wide range of output speeds keyed to the heating requirements of the home.

Maybe it's time to move up to 21st-century heating technology and upgrade to a variable-speed furnace. Here’s an overview of the advantages.

More Consistent Heating

Conventional PSC furnaces create noticeable temperature swings in the home. As the blower cycles on and off repeatedly, temperatures may swerve from 10 degrees above the thermostat setting to 10 degrees below. Rooms are always overly warm or too chilly. A variable-speed ECM blower runs at low output continuously, maintaining comfort levels close to the thermostat setting at all times.

Lower Operating Costs

A typical PSC furnace blower guzzles over 500 watts of electricity when it's energized. A variable-speed ECM blower consumes less than 100 watts, substantially reducing the electrical component of your heating costs.

Improved Filtration

The air filter in your heating system protects indoor air quality—as long as air circulates through the filter. When a conventional system blower cycles off every few minutes, circulation stops and filtration ceases. Optimum air quality is also on-and-off. Because a variable-speed blower runs continuously, air filtration never stops and the indoor environment improves.

Longer Component Life

A conventional motor runs at full-blast output and turns on and off repeatedly, incurring substantial wear and tear. Variable-speed blowers run consistently at reduced output and stay cooler. This reduces wear and contributes to greater reliability and a longer expected service.

For more advantages of upgrading to a variable-speed furnace, contact the heating professionals at Air Assurance.

Our goal is to help educate our customers in the Tulsa and Broken Arrow, Oklahoma area about energy and home comfort issues (specific to HVAC systems). Credit/Copyright Attribution: “Gustavo Frazao/Shutterstock”