Natural Resources Canada / Sélection de la langue - Ressources naturelles Canada - INCREASING THE ENERGY EFFICIENCY OF BOILER …
At 80 percent boiler efficiency, this heat requires about 29.7 m 3 /h (1050 cu. ft./h) of natural gas, worth about $32,100 per year (based on 300 days per year at $0.15/m 3). Water-heating boiler systems, obviously, do not incur the blowdown costs. Maximize hot
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