Abstract: A coal consuming boiler is provided with a combustion chamber having a divider of refractory material formed therein which separates the combustion chamber into primary and secondary combustion areas. A coal burner head for combusting coal is located in the primary combustion area. Primary combustion air is directed to the burner head while additional secondary combustion air is directed to the secondary combustion area to ensure that all combustible gases are thoroughly burnt up prior to the exhaust exiting the combustion chamber through a heat exchanger of the boiler. Exhaust tubes extending through the heat exchanger are configured in a horizontal double-pass configuration. A cleaner is provided in the form of nozzles associated with each of the exhaust tubes which are arranged to direct a high pressure flow of gas periodically therethrough for removing collected ash from the exhaust tubes to increase efficiency of the heat exchanger.

Abstract: Portable or temporary heating is provided by locating a container adjacent an area to be heated in which the container comprises a portable building including a coal storage compartment and a heating compartment therein. A heating apparatus, for example a boiler, is provided in the heating compartment which consumes coal. The coal storage compartment includes a transfer mechanism for transferring the coal stored therein to the heating apparatus responsive to fuel demands of the apparatus. Ambient heat from the heating apparatus is used to maintain coal in the coat storage compartment above freezing to prevent bridging thereof.