Abstract: A water heater comprising a tank defining a water chamber, a combustion chamber located beneath the water chamber, a flue extending through the water chamber, having a lower end communicating with the combustion chamber, and having an upper end, and a power vent blower assembly including a blower having an inlet and an outlet, and a conduit adapted to communicate with the ambient atmosphere of the water heater, the conduit including a first end communicating with the upper end of the flue, a second end communicating with the blower inlet, and structure for mixing gases from the flue with air from the ambient atmosphere of the water heater, the mixing structure including a first projection extending inwardly and in the direction of gas flow through the conduit on one side of the conduit, and a second projection extending inwardly and in the direction of gas flow through the conduit on the other side of the conduit.

Abstract: A water heater comprising a tank including an outer surface, and including an inner surface defining a water chamber, an electrical component extending outwardly of the outer surface of the tank, an outer jacket surrounding the tank and having therein an opening affording access to the electrical component, a door which is mounted on the outer jacket and which covers the opening, a dam which is located within the opening and surrounds the electrical component, which extends between the tank and the outer jacket, and which includes a portion extending between the door and the outer jacket, and insulating material located between the tank and the outer jacket and outside of the dam.

Abstract: In a hot water heater (10), a bottom base pad (34) of relatively rigid insulating material has an outer tapered side (38) allowing clearance of the bottom edge (30) of the outer jacket (14) past the top (40) of the peripheral annular portion (36) of the base pad (34) without snagging, to facilitate assembly, and providing decreasing clearance between the tapered side (38) and the jacket (14) as the jacket is slid downwardly.