| 摘要 |
A heater system having improved efficiency and performance embodies air and fuel regulator valves, water and air supply jackets, and flow directors for the hot combustion gas generated by the heater burner which gas passes through a central flue in a water storage tank and is then exhausted through an exhaust vent to atmosphere. The air and fuel regulator valves are non-electrically controlled and are responsive to water demand requirement for improved heater efficiency and performance. The water supply jacket closely surrounds the central flue and receives supply water at the top thereof and discharges same to the bottom of the storage tank thereby increasing the heat transfer characteristics of the heater. The air supply jacket surrounds the exhaust vent and air is drawn in through the top of the jacket along the exhaust vent for preheating and then is directed to the burner to support combustion. The flow director is positioned between the burner and the base or the storage tank for directing the flow of hot combustion gas radially outwardly and then inwardly along the full extent of the tank base to increase heat transfer surface area and time.
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