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American Radiator Company IDEAL "KOLFLASH" Coal-buming Water Heater The firepot of the Kolflash Heater is made of cast iron with a one-inch non-heat-conducting refractory lining. Under ordinary operating conditions the tem perature of the smooth, enameled and non-waterbacked exterior of the firepot is no higher than the temperature of the water in the tank. This lining not only contributes to the efficiency of the heater, but also provides for a quick pick-up capacity. For the lining retains the heat of the fire, and after a shaking-down and the addition of more fuel, the new charge of coal quickly ignites. The radiant heat of the glowing coals plays directly on the broad bottomed, water-backed surface of the tank, and. the heated water rises, extracting increasing amounts of heat from the gases in the central flue. The Ideal Kolflash Heater has been designed with deep firepot especially to provide for long firing periods. Boilers Specifications Large combustion chamber insures minimum at tention. For ordinary household demands this heater need be fired but twice a day. One inch, non-heat-conducting refractory lining in firepot, prevents heat loss and insures quick pick-up heating capacity. Water-surrounded flue insures maximum absorption of heat from the gases:' Extra-heavy shell insures durable service. Arco Automatic Regulator keeps water at right temperature. Flexible, sturdy grating especially designed for easy >caretaking. Outside-jacket finished in beautiful French pearl gray. Base and top finished in beautiful green porcelain enamel. 520 Boilers and Specialties American Radiator Rompany General Sales and Eastern Executive Office 40 West 40th Street, New York. Western Executive Office and Accessories Division 816 South Michigan Avenue, Chicago, Illinois Manufacturers of Ideal Boilers, American Corto Radiators, and other Heating, Ventilating, and Refrigerating Products PACKLESS VALVE Arco Packless No. 999--leak- proof--does not require repacking. Does hot stick or bind--opens with one smooth turn of special com position handle never gets hot. No. 999r Furnished in either round or lever handle--made in angle, corner and globe patterns for steam, water, vapor or vacuum. PACKED VALVES Detroit Steam Valves Metal well dis tributed--strong and heavy where strength is needed. Regularly equipped with composition handle, black hard rubber finish. No. 72 Angle, No. 32 R. H. Corner, No. 37 L. H. Corner, No. 57 Globe, No. 373 Gate. Detroit Equalizing Hot Water Valve No. 104 Arco Fractional Control Type No. 994 Same as the No. 999 Pa ck1 ess with dial equipment and calibrat ing cone on disc. Opens and closes smoothly--never sticks or binds. The narrow edge of the plate presents a small area of contact so that corrosion is easily broken away. Made in angle pattern only--Lever handle No. 105. No. 846 Thermostat MERCOID CONTROLS Patents Pending All Mercoid Controls employ the ' Mercoid Switch which carries the full line current at 110 or 220 volts without arcing or corrosion of con tacts. Mercoid instruments give automatic control of temperature, pressure or vacuum. The various models provide a wide field of ap plication. The No. 845 Mercoid Thermostat is especially adapted for use with Unit Heaters--starting or stopping the fan as the air tem perature- changes. The No. 847 Arco Motor Valve, for high or low pressure steam, water, air. etc., can be used with any Mercoid1 Control. Write for full details of this com plete line. 521 ,No. 848 Type For temperature. Pressure or vacuum