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Branches &r. Louis Memphis Omaha Minneapolis Salt Lake Crrr Dallas Air Conditioning, Automatic Heating Systems L. J. Mueller Furnace Co. Established 1857 2009 W. Oklahoma Ave., Milwaukee, Wis. Branches Los Angeles Kansas Citt Baltimore Philadelphia Pittsburgh Chicago SERIES "O" OIL-FIRED AIR CONDITIONING UNIT The basic, patented design of this Mueller unit secures a new standard of efficiency and fuel economy. The air passes over heating surface not once, but three times. Velocity and impingement create a rate of heat transfer impossible in previous designs. The silent fan supplies generous volumes of warm, humidified, filtered air to secure uniform temperatures. The Mueller Oil Burner is of pressure atomizing type, specially designed for use with this unit. Details of construction and method of operation of the complete unit are shown at the right. Available in three sizes to handle most residential requirements. CLIMATOR FAN-FILTER UNITS For positive distribution of air in old or new construction, wherever air is to be moved, there is a Mueller Climator Fan-Filter unit available. Fans are designed in accordance with latest aerodynamic principles. Filter area is adequate to handle the air requirements. Fans have ample air delivery capacity for the addition of cooling, if desired. Climator units are available in a range of sizes capable of handling practically any requirement. CLIMATROL AIR CONDITIONING FURNACE Enclosed in the compact, ultra-modern cabinet are the furnace, fan, humidifier and filters, together with controls for automatic operation. Heat is supplied by Mueller gas-fired "HeatSpeeder" sections. The powerful Mueller fan provides positive circulation of conditioned air to all rooms. Cut-away view shows fire travel through one of the sections, also the complete assembly of fan, motor, humidifier, filters and controls. Available in five sizes. 918 L. J. Mueller Furnace Co. Air Conditioning, Automatic Heating Systems Mueller Heaters For All Fuels A Complete Line for All Purposes Return Flue all-cast Fur nace. 18 in. to 30 in. fire- pots, single and double firedoor styles. Available in round, galvanized or square, lacquered casings. Mueller Steel Furnace. Riveted and welded. Extra heavy construction. Burns any fuel. Seven sizes, 20 in. to 34 in. drums. Square or round casing. Gas Era Unit Heater. Floor-mounted or sus pended type. Available in sizes from six to twenty sections, with A.G.A. out put ratings from 216,000 to 720,000 Btu per hour. Gas Era cast iron fur nace. A.G.A. input rating, 65,000 Btu per hour per section. I nsulated, lacquered casing for fan or gravity. Series "E" Gas Era Furnace. A.G.A. input rating, 45,000 Btu per hour, per section. Fan or gravity casing. Muelleraire unit. Gas-fired with fan, filters, and humidifier.5sizes--A.G.A. input ratings, 72,000 to 180,000 Btu. Series "A" Gas Boiler. A.G.A. ratings, 180 to 1,260 sq ft steam; 290 to 2,015 hot water. Series 20 Oil-fired Air Conditioning fur nace. Furnished with or without burner. Practically any burner may be used. Three sizes, from 125,000 to 200,000 Btu per hour at registers. Complete catalogs on each of a Nos. 93, 94 and 95 cast iron Horizontal Tubular Heaters are especially designed for schools, churches and similar large buildings. Capacities from 1,188,000 to 1,390,000 Btu per hour. ve units available upon request. 919