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  1. #1
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    Default Heat Seal II damper on water heater vent

    This is on a water heater vent. I've never seen one before, but it appears to be similar to the Ameri-Therm that I have seen on boilers.
    I'm going to recommend removal, but anyone have specific experience with these things?

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  2. #2
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    Default Re: Heat Seal II damper on water heater vent

    Bimetalic stack damper. Old large (60-75 gal-ish) gas WH?
    What else is venting up the stack?
    Basement install? multi-level home? multi-dwelling multi-floor building?
    Upon what basis are you "recommending removal"?


  3. #3
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    Default Re: Heat Seal II damper on water heater vent

    Quote Originally Posted by H.G. Watson, Sr. View Post
    Bimetalic stack damper. Old large (60-75 gal-ish) gas WH?
    What else is venting up the stack?
    Basement install? multi-level home? multi-dwelling multi-floor building?
    Upon what basis are you "recommending removal"?
    It is on a 40 gallon gas WH. There is a gas-fired boiler also venting into the unlined brick chimney. Two story row house single family basement.
    I am "recommending removal" because there is no interlock or spill switch. If the damper fails to open, the water heater continues to run.
    Similar to the Ameri-Therm discussion: http://www.inspectionnews.net/home_i...nt-damper.html

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
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  4. #4
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    Default Re: Heat Seal II damper on water heater vent

    Quote Originally Posted by John Arnold View Post
    It is on a 40 gallon gas WH. There is a gas-fired boiler also venting into the unlined brick chimney. Two story row house single family basement.
    I am "recommending removal" because there is no interlock or spill switch. If the damper fails to open, the water heater continues to run.
    Similar to the Ameri-Therm discussion: http://www.inspectionnews.net/home_i...nt-damper.html
    Right on .

    .

    Last edited by H.G. Watson, Sr.; 10-24-2012 at 07:55 AM.

  5. #5
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    Default Re: Heat Seal II damper on water heater vent

    Quote Originally Posted by H.G. Watson, Sr. View Post
    Right on .
    OK.
    Out of sight. Power to the people.

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  6. #6
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    Default Re: Heat Seal II damper on water heater vent

    It is on a 40 gallon gas WH. There is a gas-fired boiler also venting into the unlined brick chimney. Two story row house single family basement.

    I am "recommending removal" because there is no interlock or spill switch. If the damper fails to open, the water heater continues to run.
    The set up you describe has more concerns that are not addressed simply by removing a bi-metalic STACK damper. Its not a 4-flap/fin Ameri-Therm. Could make things worse JUST doing that (removing a stack damper).

    You don't indicate, guess we are to assume a Cat I WH with a draft hood, spillage nightmare. You didn't indicate if the basement was tight (infiltration, enclosed space) with living space/conditioned either.


  7. #7
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    Default Re: Heat Seal II damper on water heater vent

    Quote Originally Posted by H.G. Watson, Sr. View Post
    The set up you describe has more concerns that are not addressed simply by removing a bi-metalic STACK damper. Its not a 4-flap/fin Ameri-Therm. Could make things worse JUST doing that (removing a stack damper).

    You don't indicate, guess we are to assume a Cat I WH with a draft hood, spillage nightmare. You didn't indicate if the basement was tight (infiltration, enclosed space) with living space/conditioned either.
    Yes, Cat I WH with a draft hood. Basement not tight, not living space, not conditioned. 97 year old row house.
    Obviously, chimney needs a liner.

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

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