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Why side taps for space heating off of gas DWH?

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Jells
Jells Member Posts: 566
in Domestic Hot Water
I'm trying to figure out why to use the tanks with side taps rather than using the regular dip tube and top tap. I've installed both, and can't see difference.

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  • Jells
    Jells Member Posts: 566
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    Youngplumber said:
    Access. 
    If that were the case then why promote it solely for space heating and not general usage? 
  • Jamie Hall
    Jamie Hall Member Posts: 23,324
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    Why use a domestic hot water heater for space heating at all? It's not meant for that use.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    SuperTech
  • PC7060
    PC7060 Member Posts: 1,160
    edited January 2021
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    The side pipe one can fit nicely into tight spaces.



    Youngplumber
  • Jells
    Jells Member Posts: 566
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    Jamie Hall said:
    Why use a domestic hot water heater for space heating at all? It's not meant for that use.
    Not true, some manufacturers include specific instructions, and side taps for space reasons tend to be more for electric, not gas where the top needs to be open anyway.

    But to answer the question generally you should see my overlong post in the main forum. Apparently putting all my questions in one post was the wrong approach so now I guess I'm going to ask 5 different individual questions. 
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,304
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    Hi, I'll add that if you're going to use a tank type heater for space heating, or with solar thermal, it's nice to have more taps so you don't have the possibility induced flow in one loop because of flow in another. It works much like a hydraulic separator.

    Yours, Larry
    mattmia2

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