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  1. #1
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    Dynamic Furnace Efficiency

    Hello all,

    I'm researching single-stage gas furnace controls. I cannot find any detailed furnace efficiency data past AFUE or other averaged stats. I want to quantify the savings which would be achieved by less frequent ON/OFF control switches. All I can find is that "It's like a car, it wastes more energy when it starts up and slows down," and that's not really helpful.

    Does anyone have test data of heat output energy and gas input energy for a furnace like this as a function of time in a cycle? If not, would you know where to find it?

    Thanks for any input!

  2. #2
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    Try looking up thermal efficiency as opposed to AFUE.

    Are you trying to determine how much can be saved by adjusting the differential on a thermostat? It might be possible to save some that way but you will sacrifice comfort as a result.
    Last edited by pageyjim; 06-25-2020 at 09:51 PM.
    Signature removed Violated rule #15

  3. #3
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    Thread Starter
    Thanks pageyjim!

    Nothing from the thermal efficiency, in research or industry blog type channels.

    That differential increase is in effect what I'm looking at, I want to quantify just how much I will save by doing it.

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