Stem Boiler Sizing

Wayne_14

Need to replace a steam boiler, once we have the square feet with a lot of help from "Dan's" book, what is the multiplier or safety factor needed.

Al Letellier

steam boiler sizing

Wayne, most of todays boiler manufacturers factor pick-up load in their sizing. If your mains are insulated, size the boiler to the connected load, if not, check with the boiler manufacturer to be sure. Page 75 of "lost art of steam heating" gives a good explanation of haw to size when in doubt.
Good luck.

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Wayne_14

Thank You

I have to "BORROW" back my book.

Dave Flood_2

Steam Boiler sizing

The PMAA manual recomends that you add up the EDR of all radiators. Then multiply by a pick up factor of 1.33.