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Btu's in hand, how to size radiator?
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mikemac52
Member Posts: 47
I have my coolcalc manual J in hand and the Btu requirements per room. How close to come to the btu numbers required with the capacity of the radiators? Should I leave any headroom? The cast iron radiators were quite large and will be downsizing some of them for space saving reasons. (I mean, the wife told me to...)
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Size them to the heat loss of the room within 5%.Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
Consulting & Troubleshooting
Heating in NYC or NJ.
Classes0 -
And, since this is tagged under hydronic, not steam, be sure to account for the temperature you plan for your circulating water.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0 -
If you are only downsizing some of the cast iron radiators, be careful of your zoning. If you have existing radiators which are 200% of design with new that are 105% of design, you would be wise to zone them separately or add TRV's"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
Thanks for the quick replys! Hoping to keep the water at 140 F. Would have been 130 F but for a bad interior design Choice...0
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