What Is Variable Speed Technology?

“Variable speed” refers to the fan motor inside the air handler—the indoor part of an air conditioner that moves cooled or heated air throughout the ductwork of your home. An air handler is usually a furnace or a blower coil.

Almost all HVAC professionals will agree that variable-speed air conditioners are the most efficient type of AC unit around. Compared to single-stage and two-stage AC units, they use less energy and provide a better comfort level in your home.

A variable-speed system blows a steady stream of cool air into your home for long periods before turning off. The almost constant supply of air balances the temperature in your home, which reduces hot spots and cold spots.

What Are The Advantages of Variable Speed ACs?

LESS NOISE

Typically, variable-speed AC units will run at 40-50% output the majority of the time. However, they may kick on at 100% before ramping down to a lower setting when they first start.

When the compressor runs at lower speeds, it’s quieter, which is less intrusive to some homeowners. On the other hand, some homeowners tune out the air conditioner no matter how loud it gets.

LOWERS COOLING BILLS

Variable-speed AC units are more efficient, which means they will use less energy to keep your home cool than a single-stage or two-stage AC unit. Your utility bills will be lower, and over the typical 15 to 25-year lifespan of a typical air conditioner, you could save thousands of dollars in electricity costs.

MAY QUALIFY FOR REBATES

Certain states and utility companies may offer rebates if you purchase an air conditioner with a high-efficiency rating. Since variable-speed air conditioners have some of the best SEER (Seasonal Energy Efficiency Ratio) ratings on the market, they usually qualify for these rebates.

Rebates are constantly changing, so it is best to check with your state, county, and utility company to determine if they offer any rebates and what AC systems qualify.

What Are The Disadvantages?

HIGHER UPFRONT COST

Variable-speed air conditioners are generally the “flagship” models of an air conditioner’s manufacturer’s lineup. As such, you will be paying a premium to get the best-in-class unit.

MIGHT BE OVERKILL

Depending on the climate zone you live in, this air conditioner’s increased efficiency might not be worth the extra price. In some areas of the county where the summers are particularly mild with ideal relative humidity, a two-stage or even a single-stage AC unit might provide good performance.