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Sizing a steam boiler

fab4ever77
fab4ever77 Member Posts: 8
in Strictly Steam
Looking at Burnham IN line, 1200 sq ft. home, EDR total is 391.
Which Burnham IN would you recommend?
IN4=65,000 BTU output
IN5=86,000
IN6=108,000

I'm guessing the IN5 is the best one for me, but what would happen if I buy the IN4 instead?

Thanks!

Comments

  • Fred
    Fred Member Posts: 8,542
    The IN4 is rated at 271 sq. ft. EDR. that is way too small and leaves you no pick-up/piping factor. The IN5 is rated at 358 sq. ft and would leave you about 20% pick-up factor. The IN6 is way too large @ 450 sq.ft, about 15% over-sized plus the 33% pick-up factor. You will likely get a lot of short cycling with the IN6.
    The IN5 is the best pick in the Burnham IN line.
  • BobC
    BobC Member Posts: 5,502
    Are you sure about that EDR?

    I ask because my 1100 sq ft home only has about 200 EDR

    Bob
    Smith G8-3 with EZ Gas @ 90,000 BTU, Single pipe steam
    Vaporstat with a 12oz cut-out and 4oz cut-in
    3PSI gauge
    KC_Jones
  • fab4ever77
    fab4ever77 Member Posts: 8
    Sure about the EDR. 8 radiators and some are oversized in our old home

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