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  1. #1
    Join Date
    Mar 2004
    Posts
    23

    Question How to set heat pump & furnace lockouts?

    I have a Carrier Hybrid Heat dual fuel HP w/ NG furnace. According to the Carrier's calculator:

    Thermal balance point = 43 F
    Economic balance point = 62 F

    So how should I set the HP lockout and the furnace lockout?

    Suppose next year the utility cost change so that:

    Economic BP = 20F

    How should I set the lockouts then?

  2. #2
    Join Date
    Mar 2004
    Posts
    23
    Anyone?

    The range of HP lockout is "None" or "<5 F" to "<55 F"
    The range of furnace lockout is "None" or ">5 F" to "">55 F"

    Seeing as I can't set the HP to lockout at 62 F I have it set to the closest which is "<55 F". What should the furnace lockout be set at? "None"? ">55 F"?

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,599
    If the economic balance point is 62, not much point in buying a heat pump. That says gas is cheaper below 62. Really don't need much heat above 62 out. So 55 is probably the best bet until the gas price rises and lowers the EPB.

  4. #4
    Join Date
    Mar 2004
    Posts
    23
    Quote Originally Posted by BaldLoonie View Post
    If the economic balance point is 62, not much point in buying a heat pump. That says gas is cheaper below 62. Really don't need much heat above 62 out.
    My local utility prices change a lot e.g. in 2006 the economic balance point would have been 12 F. So how would I set the HP and furnace lockouts in that situation?

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