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water heater

ScottMP
ScottMP Member Posts: 5,884
life expectancy and efficiency ? Add on the controls that Brad has mentioned and .....

I think the investment for the whole house is worth it in the long run.

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Comments

  • sean_26
    sean_26 Member Posts: 22
    hot wate heater v.s boiler

    should i use a boiler for radant heat or a bradford white 75 gallon 80000 btu water heater.the house is 2500 sq ft.water heat is cheaper but is it wiser??
  • Brad White
    Brad White Member Posts: 2,398
    If your local codes allow it

    and if the HWH is dedicated to only heating (no domestic interconnection nor service), it can be an economical way to go.

    The issue of proper sizing is key of course. Knowing your heat loss within your climate is key and that should be presumed.

    There will not be the modulation ability or on-off control as it probably has a standing pilot. Getting EI and a vent damper usually only happens on commercial units that I have seen but others will have their opinions.

    You may not have the ability to deal with a "runaway" burner so a WAGS valve and the usual safety devices such as a spill switch should be scrupulously adhered to.

    Operating trim should be considered such as a 30 PSIG relief valve, LWCO and expansion tank of course.

    What is good about water heaters as boilers is that as a pressure vessel they are rated for 150 PSIG yet run at about 12-18 PSIG for heating. They are also used for 100% raw water duty yet will see little if any new water in a closed system.

    Check your local codes, there may be some resistance to the practice.

    If you can find a proper ModCon boiler though, you can get outdoor reset, modulated input/output and an appliance rated for the duty and at higher efficiencies.

    I see water heaters as an entry-level application for an out-building or where no other method is practical within a tight budget. Safety first always.
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"



    -Ernie White, my Dad
  • J.C.A._3
    J.C.A._3 Member Posts: 2,981
    Sean and Brad....

    Don't forget that there ARE water heaters with a separate coil for just this purpose.

    The second set of tapping's can be used for a closed loop, completely separate "system". I know Brad's family makes one!!!( I want a kickback for the plug bunkie!) :O~ Chris
  • Brad White
    Brad White Member Posts: 2,398
    I wish....

    I cannot even copyright my own name for my own Web Site! But I do get great service at the supply house counter. The B-W rep also asks for my card....

    Agreed, the Combi unit has some merit, issues notwithstanding. I have not specified one in years and was not paying attention. Have those issues been resolved?
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"



    -Ernie White, my Dad
  • ScottMP
    ScottMP Member Posts: 5,884
    Brad I know how it feels

    I get the strangest looks when I order the Scott Milne ...... uuuhhhh.

    Well at least the Scott Power .... mmmmm

    Ahhh ... who am kidding, I got nothing.

    Scott

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  • J.C.A._3
    J.C.A._3 Member Posts: 2,981
    I'm....

    Not sure Brad. I just wanted to give the choice, because it's there.

    I wouldn't do it for obvious reasons, and totally agree with Scott that the cost shouldn't influence something of such importance. This is the equipment that will keep you WARM and in hot showers....in your largest investment.Why go "low ball"?

    Unlike a new car, this actually ADDS value, and WILL pay for itself in time. (Faster if the price of fuel rises!!!) Chris
  • ScottMP
    ScottMP Member Posts: 5,884
    Chris

    its too nice of a day for you to be inside, go play outside.

    I'm going now too :)

    Scott



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  • Brad White
    Brad White Member Posts: 2,398
    And I always thought you were the \"Scott\"

    of "Scott Tissue"....

    I am just so... disappointed.

    :)

    Then again, I am in the office doing shop drawings. Not complaining, just catching up.

    Have a blast today for me.
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"



    -Ernie White, my Dad
  • sean_26
    sean_26 Member Posts: 22


    brad can you draw this on paper for me?
This discussion has been closed.