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gas conversion burner flue

Dan467
Dan467 Member Posts: 11
in Gas Heating
how do i size chimney liner size , oil boiler 7 inch water heater 4 inch btus or sq inches?

Comments

  • Tim McElwain
    Tim McElwain Member Posts: 4,621
    What is the input to both appliances?
  • Dan467
    Dan467 Member Posts: 11
    40k and 120k
  • captainco
    captainco Member Posts: 793
    Square inches is always safer than btus Btus never allow for excess air or dilution air.
  • Charlie from wmass
    Charlie from wmass Member Posts: 4,322
    btus is only approved method by NFPA 51, 52,
    Cost is what you spend , value is what you get.

    cell # 413-841-6726
    https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating
  • captainco
    captainco Member Posts: 793
    NFPA did not approve the btus method, they approved the computer program that created the marginal venting tables. You must go back to the original development of the GAMA Venting Tables in 1988-89. If you read what they say, you might see that area would be safer.
  • Tim McElwain
    Tim McElwain Member Posts: 4,621
    Jim is correct I however always like to check it both ways. I guess old dogs never change their ways unless they find out that the way they have always done it is not necessarily the correct way. I agree using are is the best way. Many of the installation manuals for conversion burners would give you size based on BTU.

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