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kwh compared to therms? (gas or electric hot water)

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by mikeyny, Nov 6, 2010.

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  1. mikeyny

    mikeyny Feeling the Heat

    Joined:
    Nov 16, 2007
    Messages:
    294
    Loc:
    upstate ny
    Since I preheat my domestic hw with a home brew heat exchanger I wonder if I would be better off using an electric water heater. Presently I have a separate 50 gal tank that the cold water enters, when the wood boiler is running it makes hot water thru my heat exchanger. (5 ft of 2inch black iron pipe with 1/2 inch finned copper running thru it) and that feeds into my gas water heater. My nat gas bill varies from 5 to 17 therms per month. 17 therms is about 38 bucks. I was wondering if it would be better (cheaper) to use an electric water heater, since there would be no standby looses. When I googled a therms to kwh calculator it says 17 therms equals 498 kwh. Is that correct? IF it is gas is much cheaper in my area. Any thoughts.
    Mike

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  2. ewdudley

    ewdudley Minister of Fire

    Joined:
    Nov 17, 2009
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    Loc:
    Cayuga County NY
  3. woodsmaster

    woodsmaster Minister of Fire

    Joined:
    Jan 25, 2010
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    Loc:
    N.W. Ohio
    I believe in most places gas is currently cheaper than elec. Not so a few years ago and who Knows what the future holds.
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