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    BTU rate Amtrol WH7L (5 Posts)

  • rich67 rich67 @ 10:35 AM
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    BTU rate Amtrol WH7L

    Does anybody know the Max BTU's my Amtrol 41 gal indirect heater can use?
    I will be converting from oil to natural gas and am trying to get an idea of  max heat load on the boiler. It has electronic controls and when I punch up the BTU it displays as high as 149000 BTU. How accurate is this reading? Is it possible that it would be that high?
  • JStar JStar @ 8:33 PM
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    It can "use" anything. What the right amount of BTUH's are depend on your demand. How man showers, sinks, laundry, etc. Size of boiler, and water temperatures will also greatly affect performance.
    - Joe Starosielec

    Guaranteed performance. Guaranteed energy savings.

    Serving all of NJ, NYC, Southern NY State, and eastern PA.
    Consultation anywhere.
    (Formerly "ecuacool")
    This post was edited by an admin on April 29, 2013 8:34 PM.
  • Zman Zman @ 9:55 PM
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    I did not find any info on that exact model. Most amtrol indirect have 3/4" boiler side piping. They also have a fairly high head loss exchanger design. I would be surprised if it will allow more than 4 GPM to flow through.In the very best day that exchanger would release enough energy to give you a delta t of 40 degrees. 4X40x500= 80,000 BTU.
    In reality I am not convinced it would be that high.
  • rich67 rich67 @ 11:01 AM
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    Thanks for the help...

    So, theoretically boiler net output of 80000 BTU would be enough to keep up with the demand.
  • Zman Zman @ 11:06 AM
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    The maximum the tank can absorb would be 80,000. That is based purely on the boiler side connection. The real number may be lower depending on the surface area of the exchanger.
    Amtrol should have those numbers if you need to get closer.
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