Abstract: An HVAC unit for a recreational vehicle includes an enclosure having an ambient air inlet, an exterior outlet, a return air duct connection, and a conditioned air duct connection. An air conditioning system and a heating system are each located within the enclosure. The air conditioning system includes a compressor, a condenser, an expansion device, and an evaporator operably connected for cooling air entering the enclosure through the return air duct connection. The heating system includes a gas-fired burner assembly located within a sealed combustion chamber and a heat exchanger operably connected to the combustion chamber for heating air entering the enclosure through the a return air duct connection. A control system is operably connected to the air conditioning system and the heating system to selectively heat or cool air entering the enclosure through the a return air duct connection and exiting through the conditioned air duct connection.

Abstract: A water heater includes a rotationally molded plastic enclosure, and a tank for holding water to be heated located within the enclosure and having electrical components at a forward end. The enclosure has a cylindrically-shaped side wall, a front wall at a forward end of the side wall, and a rear wall at a rear end of the side wall to form an enclosed interior space for the tank. The front wall has an opening at the electrical components and a removable electrical enclosure is secured to the enclosure covers the opening in the front wall. The tank has a cold water inlet, a hot water outlet, a drain, and a relief valve and the enclosure has openings for the cold water inlet, the hot water outlet, the drain, and the relief valve. Preferably, a common molded enclosure blank is used for a plurality of different water heater configurations.