Hoffman Main Vent

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Mike Cascio
Mike Cascio Posts: 143
in THE MAIN WALL
Hi,
Just our of curiosity what is the difference between the Hofffman 75 and the Hoffman 75H. Also Does the Gorton 1 vent out more are than one of these.

Thank you,
Michael J. Cascio

Comments

  • michael_15
    michael_15 Posts: 231
    vents

    I believe the 75H is just a high-pressure variant of the 75. The venting for the Hoffman 75's is on the order of the Gorton #1.

    -Michael
  • Mike Cascio
    Mike Cascio Posts: 143


    Also I was looking at picutres of the Hoffman 74 Unit Heater Vent and noticed that the orfice was not much different between the two. So what is the actual difference between the two?
  • Steamhead (in transit)
    Steamhead (in transit) Posts: 6,689
    The holes in the chomed cap

    on top of the #74 and #75 vents are not the actual vent ports. These can be seen by unscrewing the cap. The #75 is similar to the Gorton #1 in capacity. The #74 is a high-pressure vent with a very small port and is not suited for low-pressure work at all.
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