The 204 Series water wall hot-water boilers are now available in the expanded range of 500,000-3.12 million Btu (input). The units offer an efficiency of up to 86 percent. It can be gas, oil, or combination fired; it is 1146.2 low-NOx certified on gas. It fits through a 36-inch doorway and uses no cast refractory material. According to the manufacturer, there is less heat loss due to the water wall sealed combustion chamber design. Features include extra-heavy boiler tubes 1-5⁄16-inch OD, modular cabinet construction, and welded tube bundle (no rolled connections or gaskets).

Parker Boiler Co., 5930 Bandini Blvd., Los Angeles, CA 90040; 323-727-9800; 323-722-4828 (fax);;

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