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Steamhead (in transit)
Steamhead (in transit) Member Posts: 6,688
in THE MAIN WALL
the most famous is the Differential Vacuum system, later called the Vari-Vac. It first came out in 1926. Dunham also produced a vacuum-return system and a Vapor system in several different versions.

If you're working with an existing Dunham system, tell us what hardware you've found and post as many pictures here as you can. This should help us ID your system.

"Steamhead"

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Comments

  • Chuck_18
    Chuck_18 Member Posts: 3
    Dunham coal fired vapor/vacuum heating systems

    Does anyone out there have a drawing of a Dunham coal fired vapor/vacuum commercial heating system from the 1920's?

    Thanks,

    Chuck
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