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Steam air vent

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mmc239
mmc239 Member Posts: 81
in THE MAIN WALL
I am going to Home Depot to buy made o mist air vent for my steam baseboard located directly above my boiler. Which model should I get?

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  • Jamie Hall
    Jamie Hall Member Posts: 23,395
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    That depends entirely on how big that baseboard is, and more importantly on how well it heats the space. So I can't really answer that...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • mmc239
    mmc239 Member Posts: 81
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    The air vent I have there now is Varivalve and it spits water out of it when I first turn heat on. It is brand new vent. 
  • neilc
    neilc Member Posts: 2,705
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    we see the vent end supported, and fixed at the valve end,
    any chance that length of fin tub is sagging in its middle?
    can you get a eyeball on that ?
    and it all pitches back to the valve?
    and then you want the slowest vent in the world on that end.
    known to beat dead horses
  • mmc239
    mmc239 Member Posts: 81
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    Which letter or number vent is the slowest?
  • neilc
    neilc Member Posts: 2,705
    edited November 2022
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    mmc239 said:

    Which letter or number vent is the slowest?

    you've found my weakness, IDK,
    there's another thread running with a link to charts here,
    I'll look for that thread, you can try search function here also,
    "steam venting charts"
    known to beat dead horses
  • neilc
    neilc Member Posts: 2,705
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    https://heatinghelp.com/assets/documents/Balancing-Steam-Systems-Using-a-Vent-Capacity-Chart-1.pdf
    it's in the middle back where the charts start
    known to beat dead horses
  • bburd
    bburd Member Posts: 921
    edited November 2022
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    That vearivalve is a notoriously fast vent, even when closed. A slow vent would be something like a Hoffman 40. Gorton also has slower vents, as does Maidomist which makes them with replaceable orifices so you can adjust them.
    —
    Bburd
  • mmc239
    mmc239 Member Posts: 81
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    After reading up, I have decided to use a Gorton air vent. I just don’t know if I should use a #4 or 5. This is a steam baseboard located in my living room. The thermostat is in the kitchen about 12 feet away. 
  • Big Ed_4
    Big Ed_4 Member Posts: 2,799
    edited November 2022
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    Slowest would be the driest

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