High-efficiency gas-fired forced-draft condensing hot water boiler
作者： Thomas Wayne Moore
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摘要: A high-efficiency hot- water boiler (10) for a heating system of building is provided. The includes enclosure (12) that contains furnace area compartment (54) within an insulated sealed casing, first watertube (56) second (58) and air-to-air preheat exchanger (76) casing. plurality separate, closely-spaced watertubes (50) extends each the compartments provides paths working fluid to flow through purposes transferring heat fluid. burner (44) located combusting air/gas mixture. casings include openings (90, 92, 94) directing passage products combustion make pass (54), third then fresh air before being exhausted from via flue (32). An mixer (86) ignition are also disclosed.
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