Patent ID: 8887322

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 forming an enclosed space, the plurality of walls including a top wall and a bottom wall, the top wall and the bottom wall having a plurality of openings formed therein; a fuel burner configured to produce heat into the housing as fuel is burned, housing being configured to allow the incoming air to flow around the fuel burner substantially unobstructed; and a heat transfer conduit fluidly connected to a water source, the heat transfer conduit having a first end and a second end which are located at the opposing ends of the heat transfer conduit, substantially all of the heat transfer conduit being disposed about a horizontal axis in the housing, the heat transfer conduit being configured such that substantially the entire length of the heat transfer conduit is in direct thermal communication with the fuel burner, the heat transfer conduit further being configured to transfer the heat produced by the fuel burner to the water flowing through the heat transfer conduit and to output heated water outside of the housing.