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The trend within the oil heating industry of immediate concern to us is the consistent trend toward smaller units. Because the predominant burner type is the high-pressure burner, it means that the nozzles which meter and atomize the fuel are becoming smaller and smaller in capacity to fit the smaller heat exchangers which are used. There are several reasons for this trend: 1. Oil-fired central heating plants are now being installed in many small houses with low heat loss. 2. The new houses being built today are better insulated than older houses. This results in a lower heat loss for the same type of house. 3. By present day standards, many home-heating plans were previously overfired. In the interest of economy, plants are now being fired at a more realistic firing rate. 4. Competition for the home- owners' and homebuilder's dollar creates a demand for smaller and cheaper heating units.
Chief Engineer, Delavan Manufacturing Co., Iowa,