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  1. #1
    I've got a Williamson gas furnance and I can't find any info on it. My HVAC man thinks he can put an A coil in from a new heat pump/AC but he's not sure if there is enough air flow. I can't find any info about Williamson furnaces on the web. Any suggestions? Thanks.

  2. #2
    Join Date
    Dec 2005
    Posts
    783
    Williamson was made in Cincinnati. It is probably very old. Most of them had drum type heat exchangers and blocked the air flow somewhat. My suggestion is to replace that old williamson with a new more efficient unit and the A/C will be no problem at all. BTW Williamson is out of business in Cincinnati.

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,594
    My boss sold Willies for 25 years. Tanks! If you can come up with a model # I can tell you the specs.

  4. #4
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,305
    If you got the old "True" Williamson, remove the front cover (Burner area) and the model Sticker should be on the right hand side.

  5. #5
    Join Date
    Dec 2005
    Location
    Cleveland, OH
    Posts
    2,744
    I've worked on many Williamson 5-in-1 furnaces. That's more than likely a belt drive furnace. It's gotta be 25+ years old, if you're adding A/C you're gambling. They will probably have to do re-wiring to the furnace so it will accomodate the A/C.

    My suggestion? Rip it out and get a new furnace too.
    Good? Bad? I'm the guy with the gun.

  6. #6
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,981
    A model number would be handy. I think that Goodman was building the Williamson gas furnaces for a few years.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  7. #7
    Join Date
    Mar 2006
    Location
    wisconsin
    Posts
    1,633
    Purchased in 1991 by Sunderland which was purchased by Hupp industries in 1990 then purchased by hupp, assets acquired by MetzgerMachine Corp milwaukee, wi., manufacturer of hvac equip. under Milwaukee Thermoflo trade name. If this doesnt help have one more book, to lazy to go get it.

  8. #8

    Got the model number

    Thank you all very much for your advise. I have the model number now: WU47122N21. It was located on the inside right panel as described. The house is 20 years old and when it was built natural gas was not available in the area. The gas furnace was added some years later. It sets right next to a York heat pump that is 20 years old. That's what I plan on replacing.

  9. #9
    Join Date
    Feb 2004
    Posts
    2,597
    manufactured in 1987, 125,000 btu. not sure of the blower size, but would suspect 5 ton.

    that is pretty old, you may want to consider replacing at the same time. at the very least have it looked over thouroughly.

  10. #10
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,594
    Probably one of the old Preway 90s. Should have plenty of blower. This furnace became the 1st Trane 90 as A-S/Trane bought Preway's design. Check the heat exchanger carefully, they liked to split open!

  11. #11
    Join Date
    Nov 2008
    Location
    Fairbanks
    Posts
    2
    I am trying to figure out or assign an efficiency for a 1980 Oil fired Williamson Tempomatic High Boy design. Anybody have a suggestion where I could find this or what it may be. Thanks

  12. #12
    Join Date
    Nov 2008
    Location
    Fairbanks
    Posts
    2

    Williamson Tempomatic efficeinys

    I am trying to figure out or assign an efficiency for a 1980 Oil fired Williamson Tempomatic High Boy design. Anybody have a suggestion where I could find this or what it may be. Thanks

  13. #13
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,594
    As far as annual efficiency which affects the oil bill, I'd say around 60%.

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