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orfice sizing chart

Bob Harper_2
Bob Harper_2 Member Posts: 54
in THE MAIN WALL
Contact Anderson-Forrester http://www.andersonforrester.com/
, who makes gauging drills to verify the correct size. The mfr.s specs must be followed or you void the warranty and listing, which is a code violation.

HTH,
Hearthman

Comments

  • wethead in wi
    wethead in wi Member Posts: 10


    quick question for you guys. i am a experienced hvac tech just wondering if anyone has a orfice sizing chart. i cant seem to find mine. looking for the correct orfice size for 5000 btu lp gas unit heater. the one in there now is a 57 for ng any help
  • jim lockard_4
    jim lockard_4 Member Posts: 13
    orfice

    Your best bet would be to contact the appliance maker for that information. Best Wishes J.Lockard
  • scrook_2
    scrook_2 Member Posts: 610


    Try this link to RegO's LP Gas Service Manual, page 43, "Flow through fixed orifices for propane (and butane) at 11 inch water column at sea level" (reprinted from NFPA 54).

    http://www.regoproducts.com/Old/LPflow.htm

    A #72 gets you 5081 BTU/hr, and a #73 4678 BTU/hr

    Sorry I don't have the correction for high altitudes.

    If you do much LP work it's worth getting a paper copy: http://www.regoproducts.com/Old/LPmanual.htm
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