January 28, 2013

If you have an older furnace in your Atlanta area home, it is most likely a single stage furnace. Single stage furnaces (also called single speed furnaces) have only one speed, which means that when the furnace kicks on, it runs at full speed. When your home gets to the desired temperature, the thermostat signals the furnace to shut off, and then it comes on again when the temperature drops below the desired setting.

This wastes a lot of energy because it takes a lot of output from the furnace to heat up your home. Multi-stage furnaces work with variable speeds that run longer and at lower speeds. This saves energy because it keeps the home at the desired temperatures but doesn’t take high output to do so. Keep in mind that installing a programmable thermostat for a single stage furnace can help, but they are not designed for multi-stage furnaces since these models already save energy by running at lower speeds.

If you aren’t sure whether or not you have a single stage or multi-stage furnace, call us for an assessment of your current system. Furnaces are measured with an AFUE (annual fuel utilization efficiency) rating, and if yours is lower than 80%, you probably have a single stage furnace and would benefit from an upgrade. Newer models can have up to 96% AFUE, and you can always look for the Energy Star label to know whether or not you are getting a high-efficiency furnace.

We can always help you go over the different furnace models that we install so that you make an informed decision. Call Comfort Zone for all your Atlanta heating needs!


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