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| Q | | What does the “differentia” on the GT-5020, GT-5010V and GT-7020 actually do?
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| A | | The “differentia” is on the GT-5020, GT-5010V and GT-7020 models. The differentia number is the number of degrees F below the target temperature that the AUXILIARY heat shuts off. The best setting for a mild climate is 4F so the heat pump is doing most of the heating. In a cold climate, 2 is the best setting because the heat pump may not be able to keep up and or may quit in severely cold climates.
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