Oil fired hot water boiler sizing — Heating Help: The Wall
Oil fired hot water boiler sizing. David2424 Member Posts: 4. June 2017. in THE MAIN WALL. Hi folks. I am replacing my oil fired hot water boiler and this site has been incredibly informative. I did the Slant Fin heat loss calculation at 64,000 BTU. I have a 3 zone 3000 sq ft home. 2 zones are forced hot air and one is hot water baseboard.
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