Abstract: A mechanism and method for automatically leveling an assembly, such as a lighting fixture, suspended from a cable having a loop, the assembly having a support member. The mechanism comprises a hanger having an opening for receiving the support member of the assembly therein. The hanger includes a plurality of sides and at least one interior downwardly facing surface for engaging the cable loop through the hanger. The hanger is inserted through a tongue on the suspension assembly and the cable loop is inserted into the hanger and engages the interior downwardly facing surface, thereby automatically leveling and suspending the assembly from the ceiling.

Abstract: A heater for burning combustible pelletized fuel. The pelletized fuel is delivered at a controllable rate to a double-walled burn pot in an enclosed combustion chamber. Combustion air is injected into the combustion chamber at a pressure higher than the ambient air pressure surrounding the heater. Combustion air is injected between the walls of the burn pot through ports in the inner wall into the fuel at or slightly below the top of the fuel level. Additional combustion air is injected approximately horizontally across the top of the burn pot through an injection air manifold. Crossfire injection air is injected approximately vertically about the periphery of the burn pot, confining fumes and exhaust air directly above the burn pot. Heated exhaust gasses rise to the top of the combustion chamber and are drawn from the combustion chamber through a heat exchange unit surrounding the combustion chamber. The exhaust gasses are drawn from the combustion chamber by suction created by and extraction air mechanism.