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  1. #1
    Join Date
    Jun 2007
    Location
    Haymarket, VA
    Posts
    4

    Default Single vs Double Hot Water Tank

    I have a 5 bedroom, 3 bath house that is served by a single 80 gallon hot water tank that needs to be replaced. Are there any advantages to replacing with two smaller tanks that are "zoned" to split functions? Any thoughts?

  2. #2
    Join Date
    Jun 2007
    Location
    NorthWest Florida
    Posts
    61

    Default Re: Single vs Double Hot Water Tank

    It can be more efficient, yes. It depends on the efficiency of the new tanks, contrasted with a new 80gal tank, your water usage patterns, etc, etc. If you can easily re-route pipes, it can be advantageous to split off the showers from the rest of the house, as you can set a timer on the tank for the showers, so that it comes on a few hours before your showers, then off soon after, so you aren't heating the water all day. Make sure to use an external insulation blanket to increase the efficiency even more.

    Another item to consider is a tankless heater, but if you don't have NG run to the house, you'll need some heavyduty wiring to support an electric tankless to support enough load for a large household.
    Tom Stangl
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    Caveat: IANAC (I Am Not A Contractor) - I am simply a DIYer that tends to do a lot of research. Contact licensed Contractors/Architects/whatever for the final legal word on any advice.

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