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Sizing vacuum system

bill_36
bill_36 Member Posts: 5
in THE MAIN WALL
How do I calculate the size of a new vacuum system. 2 pipe steam with 400 radiators 

Comments

  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,585
    Normally,

    you'd size it for two times the system's steaming capacity. All boilers steam at a constant rate of 1/2 gpm per 1,000 sq. ft. EDR. That's for the water size.



    For the air side, you have to consider the age of the system. A good rule of thumb for old systems is to allow 1 cfm per 1,000 sq. ft. EDR



    The steam traps have to be working of course.
    Retired and loving it.
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