Water heater

A water heater comprising:

• a vertically extending water tank;
• a substantially cylindrical heat exchanger positioned horizontally in said water tank and extending diametrically across the lower part of said water tank and spaced above the bottom of said tank, said heat exchanger having an open end secured in water tight relation in the wall of said water tank on one side of said tank and having a closed end projecting out of the wall of said tank on the other side of said tank in water tight relation therewith, said heat exchanger having a combustion chamber adjacent the open end and an exhaust gas chamber cocupying the space between said combustion chamber and the closed end of said heat exchanger;
• a burner directed into said combustion chamber from the open end thereof;
• a baffle assembly removably fitted into said exhaust gas chamber and having a plurality of circular baffles extending transversely of said heat exchanger and spaced along the length of said exhaust gas chamber, each baffle having an aperture in the edge thereof positioned diametrically opposite the corresponding apertures in the edges of adjacent baffles, a plurality of cylindrical spacers extending between adjacent baffles, and a rod extending through said baffles and said spacers and secured to the end baffles at the opposite ends of said assembly;
• and
• an exhaust pipe communicating with said heat exchanger at the closed end thereof and extending vertically therefrom outside said water tank, said exhaust pipe being covered with a heat insulating material.