How Does a Two-Stage HVAC System Work?
How Does a Two Stage HVAC System Work?
Two-stage cooling is a method of cooling that can more efficiently manage the cooling of your home while outdoor temperatures are changing. It can also better maximize indoor comfort and humidity levels.
One Unit – Two Compressors
Two-stage cooling is accomplished by having one unit with two compressors, one smaller compressor, and one large compressor. The small compressor is typically capable of putting out about 50% the capacity of the larger one. When the smaller compressor cannot maintain the desired temperature, the smaller compressor turns off and the larger compressor kicks in to make up the difference in power required.
Single Scroll Unloading Compressor
The second way to have two-stage cooling is to have a single scroll unloading compressor. This compressor can unload its capacity down to about 66% of maximum capacity. Both methods of getting two-stage cooling allow the unit to run at a lower stage when the high stage is not needed. When this happens, energy is saved and your energy bill is reduced.
Two Stage Heating
A heat pump system has two different sized compressors, a small one and a large one. The compressor that is used at any given time would depend upon the temperature desired. If only a small amount of heating or cooling is necessary, the smaller compressor would be engaged to save energy. The large compressor would only engage when a large amount of heating or cooling is needed.
A gas furnace that is two stage has a modulating gas valve that regulates gas flow depending upon the need.
Contact John D. Jones
If you have questions about your home’s heating and air conditioning system, or if your system is in need of repair of replacement, give John D. Jones AC, Heating and Refrigeration. Or, you may email us at firstname.lastname@example.org.
John D. Jones AC, Heating and Refrigeration is a fully licensed and insured heating and air conditioning contractor having served the HVAC needs of the Tallahassee area for more than 22 years.