Sealed vent water heater

Claim 1

A WATER HEATER COMPRISING AN UPRIGHT CYLINDRICAL WATER STORAGE TANK HAVING A BOTTOM WALL RECESSED FROM ITS LOWER END, A SUPPORT BASE SEALINGLY SECURED TO THE LOWER END OF SAID TANK TO DEFINE A SEALED CHAMBER UNDERLYING SAID BOTTOM WALL, A BURNER MOUNTED UPON SAID BASE WITHIN SAID CHAMBER, A FLUE GAS OUTLET PIPE IN COMMUNICATION WITH SAID CHAMBER AT SAID BOTTOM WALL AND TERMINATING EXTERIORLY OF THE TANK, CONDUIT MEANS DEFINING AN AIR INLET PASSAGE COMMUNICATING WITH SAID CHAMBER THROUGH SAID TANK IN THE REGION THEREOF DISPOSED BETWEEN SAID BOTTOM WALL AND SUPPORT BASE, A BAFFLE PLATE MOUNTED HORIZONTALLY WITHIN SAID CHAMBER SPACED ABOVE SAID BASE PLATE AND HAVING AN OPENING THROUGH WHICH SAID BURNER EXTENDS ABOVE SAID BAFFLE PLATE, SAID BAFFLE PLATE DISPOSED ADJACENT SAID INLET PASSAGE AND ADAPTED TO SEPARATE INLET AIR FLOW INTO TWO AIR STREAMS RESPECTIVELY ABOVE AND BELOW SAID BAFFLE PLATE, AND AN OUTSIDE ATMOSPHERE FLUE PIPE ASSEMBLY DEFINING A PAIR OF PASSAGES RESPECTIVELY COMMUNICABLY CONNECTED TO SAID OUTLET PIPE AND CONDUIT MEANS.