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Steam vents on radiators

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I would like to know if anyone has any sources for info. on
steam radiator vent location? I know it must be on the side
because steam is lighter than air. I would just like more sources
for a class I am instructing. Thanks!
JVS

Comments

  • ethicalpaul
    ethicalpaul Member Posts: 5,702
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    I believe The Lost Art book on this site goes into some detail but the short answer is on the side opposite the valve about 1/3 down from the top.

    ps: it’s typically called an air vent because it vents air then closes when steam hits it, ceasing to vent at that time
    NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el
    Hap_Hazzard
  • bburd
    bburd Member Posts: 917
    edited March 2021
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    More like 1/2-2/3 down from the top. There’s a drawing in LAOSH showing that the lower position allows more of the radiator to heat.

    Bburd
    ethicalpaul
  • ethicalpaul
    ethicalpaul Member Posts: 5,702
    edited March 2021
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    Thanks. This one is by my front door and has made me forget

    Additionally, I was off-base on my statement about what to call the dang things. On Maid O Mist's website they call them "Steam Vents" so I'm 0 for 2 on this one :cry:

    Supplyhouse calls them Air Valves and that's just crazy
    NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el