What is a variable speed furnace?

In a “variable speed” furnace, the indoor blower motor is able to move at variable speeds in order to accurately control the movement of cooled or heated air throughout the home. More precise control of airflow has several benefits, including improved air quality, energy efficiency and the ability to customize the temperature in different parts of your home.

Air Quality: A variable speed motor can keep the fan running constantly in your home, meaning that the motor continues to circulate air even when the furnace, air conditioner or heat pump isn’t running. This improves airflow and allows filters to capture more airborne contaminants and particulates.

Energy Efficiency: Variable speed motors require less electricity than standard motors, saving you money and benefiting our environment.

Improved Heating and Cooling Efficiency: Variable speed technology improves heating and cooling efficiency, or AFUE.

Zoning: Variable speed motors allow you to customize the temperature in different areas of your home, also known as zoning. This keeps your home at optimal temperature for various needs, and also cuts down on your energy bill, as you can decrease the heating or cooling in seldom-used areas of your home.

Humidity Control: A variable sped motor used in conjunction with a programmable thermostat allows you to control the relative humidity in your home, improving air quality and comfort.