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112 Air Conditioning REFRIGERATION APPLIANCES, Inc. 909 West Lake Street, Chicago 7, Illinois Manufacturers of Freon, Ammonia & Flooded Ammonia Heat Transfer Equipment Since 1931 AIR COOLED CONDENSERS Quiet, remote type Multiple hanUng in the field permits unlimited capacity ranges. Counter-flow refrigerant circuiting. Multi-circulating at no extra cost. Automatic Winter Control: Unique de sign eliminates low operating pressure and expansion valve problems due to failing temperatures. One valve controls pressure in condenser, one controls pres sure in receiver and a check valve stops liquid escape from receiver to condenser tinder all conditions. Rated Capacities: Single units 7 to 50 tons (belt drive, patented semi-auto matic adjustment), 1 to 7J> tons (direct drive). Certified nominal capacities based on 110F condensing temperature, 90F ambient. Air Conditioning Aatnutio Hcatiag, EifiUr Air C**Ua ui BUwcn UTILITY FAN CORPORATION A Division of Utility Appliance Corp. 911 East 59th Street, Los Angeles 1, Calif. Manufacturers of heavy and standard duty blowers for heating, air con ditioning and ventilating installations. Producers of blowers and blower part for original equipment manufacturers. Built, tested and rated in ac cordance with ASHAE and AMCA codes. Sizes 12 in. to 73 in. Write for catalog data. 113 Heavy Duty Type "F" Design 29 Blowers are of the forward curved blade type for extraordinary efficiency and quiet operation. Low tip speeds give lower noise levels. These blowers are available in sizes from 12 to 73 in., single and double width, Class I and Class II construction and all standard drive arrangements and discharge positions. Heavy Duty Type "FM Blower, SISW TRANSOM AIR CONDITIONERS Quiet-remote type for small jobs All aluminum construction. Insulated double drain pan. 3-speed control and thermal overload protection on motor. Rated Capacities: 9000 and 12,000 Btu/br. STANDARD AIR CONDITIONING COILS For new or old installations Patented construction features. Positive fin spacing. Rated Capacities: 2 to 60 tons, 4 or 6 rows deep. . Special sizes: M or Y* in. OD tubes with 3 to 12 fins/in. available. All copper and steel hot-dip galvanised after fabri cation coils available. COOLING OR HEATING UNITS Quiet-remote type Choice of coil arrangements for direct expansion, water, steam or combinations. Rated Capacities: 2 to 50 tons. Use with or without ducts for ceiling or floor. Insulated cabinets. Rust-resistant blowers. FURNACE AIR CONDITIONING COILS Low cost-bonnet type Converts old or new forced-air systems to summer cooling. Rated Capacities: 24,000 to 90,000 Btu/ hr. EVAPORATIVE CONDENSERS AND COOLING TOWERS Freon or ammonia for indoors and outdoors.. Rated Capacities: 5 to 100 tons. REQUEST NEW DETAILED BULLETINS Heavy Duty Type WB" Design 29 Blowers are of the backward inclined blade type for high efficiency at higher static pressures and non-overloading horse power characteristics. These blowers are available in sizes from 12 to 73 in., single and double width, Classes I, H, HI and IV construction and all standard drive arrangements and discharge positions. Heavy Doty Type "B" Blower with Variable Inlet Vanes, DIDW Utility Sets for a wide variety of ventilation and-ex-'* haust applications are available in sizes' from 10 to 37 in. with Type "F" and Type "B" designs, single inlet arrangement Number 9 with rotatable housings for any desired discharge position. These Utility sets are completely self-contained units, ready to run with a weather-proof drive enclosure available for roof in stallation. Utility Set Type "B" with Weather-Proof Drive Enclosure