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What is the difference between 2 stage and single stage?

April 26, 2017difference Stage

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What is the difference between 2 stage and single stage?

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The 2 stages refer to the ability to have a low and high output. In other words a gas furnace with a two-stage gas valve has a low output of heat and a high output of heat. This is an additional means of reducing operating cost. 2 stage machines operate most of the time in low speed unless there is a demand for heat that exceeds the normal programming of the thermostat.