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Paul S_3
Paul S_3 Member Posts: 1,280
in Strictly Steam
Hey every one I have a question in the book greening steam there are charts for vent sizing at 1,2or 3oz of pressure, which one should I use and why?

Paul S
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
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Comments

  • ChrisJ
    ChrisJ Member Posts: 16,315
    Depends

    I beleive the book explains that you may want to be more conservative if your piping isn't perfect or radiators arn't pitched perfectly



    Personally, I used the 2oz scale just because its in the middle.  You may also find that even after you calculate everything and match vents perfectly that it still doesn't work right.  For example two of my radiators call for Gorton 5s yet I'm using Gorton Cs on them.  Overall using the charts worked on my system other than a few things I had to tweak here and there due to room insulation or weird piping.

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • JStar
    JStar Member Posts: 2,752
    CFM

    I use 1oz for the mains and 3oz for the radiators. The idea is that the boiler starts at zero. The mains will fill at less pressure, and the rads will vent completely after a little pressure is built up.
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