Patent ID: 7506386

Claim:
A portable water heater providing a continuous flow of hot water by heating the water as it flows through the portable water heater to the user for immediate use, the portable water heater comprising: a housing having a plurality of walls including a top wall and a bottom wall, the top wall and the bottom wall each having a plurality of openings formed therein, the housing forming a front portion and a back portion separated by a vertical dividing member; a plurality of fuel burners located in the back portion and configured to produce heat into the housing as fuel is burned, each of the plurality of fuel burners being independently operable; at least one heat transfer conduit having a substantially uncoiled output portion and a substantially uncoiled input portion fluidly connected to a water source, substantially all of the at least one heat transfer conduit being disposed about a horizontal axis in the housing, the at least one heat transfer conduit being located in the back portion and in thermal communication with the plurality of fuel burners and configured to transfer the heat produced by the plurality of fuel burners to the water flowing through the at least one heat transfer conduit and to output heated water outside of the housing; a valve control assembly located in the front portion fluidly connected to the plurality of fuel burners; and wherein each of said plurality of fuel burners is entirely outside each of the at least one heat transfer conduit and the housing being configured to allow the incoming air to flow around the at least one fuel burner and through the housing substantially unobstructed.