Multi-tank storage type gas water heater

A storage type gas water heater comprising:

• a housing;
• a primary water storage tank within the housing;
• a gas combustion chamber within the housing and situated vertically below the primary water storage tank;
• a gas burner situated in the gas combustion chamber;
• a gas inlet in communication with the gas burner for providing gas to the gas burner;
• a plurality of supplementary water storage tanks each within the housing and vertically above the primary water storage tank and vertically above each other;
• a first diffuser chamber situated in the housing and vertically above the primary water storage tank and below a first supplementary water storage tank of the plurality of supplementary water storage tanks;
• a first single elongated plate-like diffuser situated transverse in the first diffuser chamber;
• a first flue portion extending vertically from the gas combustion chamber, through the primary water storage tank and into the first diffuser chamber for directing combustion gas from the gas combustion chamber into the first single elongated plate-like diffuser chamber and allowing the combustion gas to impinge on the first diffuser to heat the first single elongated plate-like diffuser and temperate the cold water in the first supplementary water storage tank;
• a supplementary diffuser chamber situated between each vertically adjacent supplementary water storage tank of the plurality of supplementary water tanks above the first supplementary water storage tank;
• a supplementary single elongated plate-like diffuser situated transverse in each supplementary diffuser chamber and vertically above a flue portion extending from a vertically lower supplementary water storage tank and into the supplementary diffuser chamber for directing combustion gas from the vertically lower supplementary diffuser chamber and allowing the combustion gas to impinge on the supplementary single elongated plate-like diffuser to heat the supplementary single elongated plate-like diffuser and temperate the cold water in the supplementary water storage tank;
• a cold water inlet in communication with a vertically uppermost supplementary water storage tank of the plurality of supplementary water storage tanks for supplying cold water to the vertically uppermost supplementary water storage tank;
• each supplementary water storage tank having an outlet in communication with an inlet of a supplementary water storage tank situated vertically adjacent and below the supplementary water storage tank for supplying temperate water thereto;
• and
• an outlet of the lower most supplementary water storage tank to the primary water storage tank for supplying temperate water thereto;
• the gas burner configured to heat the received temperate water from the vertically lowermost supplementary water storage tank of the plurality of supplementary water storge tanks to a preset temperature via the gas burner situated in the gas combustion chamber for outputting heated water from primary water tank and out the housing via the primary water storage tank outlet.