| 摘要 |
A water heating tank is disclosed which includes an annular water receptacle having a vertical passageway extending centrally therethrough and opening at its lower end into a plenum chamber beneath the receptacle. An annular combustion chamber assembly extends downwardly into the passageway from the upper end thereof and is removably mounted on the receptacle together with an oil-fired burner unit having a burner tube extending downwardly into the combustion chamber. A removable baffle assembly is disposed in the passageway between the combustion chamber and plenum chamber, and a circumferentially narrow exhaust flue extends vertically along the outer side wall of the receptacle and has an inlet end opening radially into the plenum chamber.
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