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Air System Equipment Air Filters CORPORATION Milwaukee 2, Wisconsin Manufacturers of PERMANENT and Replaceable AIR Filters for Heating, Ventilating, Air Conditioning, Aircraft and Industrial Use Badger designers and engineers have contributed many of today's most valuable developments in air filtration, dust, grit, and grease elimination in a wide variety of industries. BADGER Air Filters are well known for their high efficiency, low air resistance, greater dust-holding capacity, and reduced maintenance cost on an increasing range of modern applications. BADGER Type P Air Filter . . . For Air Conditioning and Ventilating Systems Permanent type, easy to' clean, sturdy and strong, with special BADGER filter mesh design that holds dust through com plete depth while providing minimum air resistance. Dual purpose expanded metal screen deflects air stream and protects. filter media. Vents in frame aid in quick cleaning, thorough draining. Standard 1 in. and 2 in. sizes from 640 C.F.M. to 1000 C.F.M. Special sizes to meet allapplications. APPROVED BY UNDER WRITERS' LABORATORIES, Inc. BADGER Type HD Industrial Filter for Extra Heavy Duty and In dustrial Air Cleaning Services BADGER REPLACEABLE AIR FILTER for domestic and commercial forced warm air and air conditioning units. A new, dry replaceable filter. Media is odorless, fire-resistant glass-fibre. Ribbed con struction on both sides of filter insures complete air filtration with 25% greater filtering surface/ Long life assured by sturdy cardboard frame cemented to rib structure. Standard 1 in. and 2 in. sizes. Specially designed for use on in dustrial ap plications, Badger Type HD is made in 2 in. and 4 in. sizes, and capaci ties from 640 cfm to 1000 cfm. Permanent type, with high dust-holding capacity, effective, sturdily constructed filter media protected by deeply crimped layers of expanded metal screen, and heavy arc welded frame. BADGER HOLDING FRAMES ^ Badger's special "Slip- BADGER Grease Filter A new de sign in allmetal Per manent type filter that is an absolute necessity in kitchens, gal- leys, and wherever grease-laden air is a fire hazard and a maintenance problem. Filter media assures greater efficiency in air circulation and ventilation, increased working comfort and safety, and protec tion to motors, brushes and mechanical equipment. Available in 2 in. thickness, adaptable to a wide variety of applications. also simplifies filter re moval and cleaning. Available in V-type, in straight banks, or adaptable to special requirements. 1012 Complete bulletins, specifications, test and performance charts may be obtained on all BADGER. Per manent and Replaceable Filters, as. well as ready engineering assistance on special problems. Air System Equipment Air Filters Farr Company Manufacturing Engineers Los Angeles California FAR-AIR FILTERS* for all types of industrial use HERRINGBONE CONSTRUCTION FAR-AIR STANDARD PANEL FILTER For Ventilation For Grease i is a. 66 3 C.F.M. CAPACITIES OF STANDARD * a. X>. v0 c I FILTERS BASED s "o ON VELOCITY USED > c 0" 5 u? o> .5 o v* n'or 11*125* 20*120* 20*i25* 346 2.40 .06" 625 795 800 1020 390 2.70 .07" 700 895 900 1145 433 3.00 .09" 780 995 1000 1275 476 3.30 .10" 860 1095 1100 1400 519 3.60 .12" 935 1195 1200 1530 563 3.90 .14" 1015 1290 1300 1655 606 4.20 .16" 1090 1390 1400 1780 650 4.50 .19" 1170 1490 1500 1910 693 4.80 .20" 1250 1590 1600 2035 Based on our recommended face velocity of 519 ft per minute, Far-Air filters deliver 50% more air with lower pressure drop. Filters are all metal, permanent construc tion . . . Installation of Far-Air Filters, ef fects a saving not only in initial costs but maintenance as well--you need only % of the filter area, with a Far-Air filter. Low .Pressure Drop . . . More Air Delivery ... High Efficiency Large Dust Holding Capacity . . . Easy Cleaning-- these Far-Air features are the result of Farr's radically different crimped wire screen filter construction. Of paramount importance to heating and refrigeration engineers is the fact that Farr Filters provide a filter area equal to the fin coil area. This special feature eliminates clumsy V-shaped additions on vent ducts usually necessary with other type filters. PROGRESSIVE LOADING As entering orifices of Far-Air Herring bone Construction Filters are loaded, air direction changes, flowing past the front loaded surface and progressively loading the clean screen mesh that remains. Greater free area permits a larger dust load with lower pressure drop. The slight difference in pressure drop when a Far-Air Filter is loaded from when it is clean maintains a constant balanced air -flow in the air distribution system. CERTIFIED PERFORMANCE You can depend on Far-Air Filters to deliver the performance claimed for them . . . Farr Certifies filter performance data. For full information about other types of FAR-AIR FILTERS, write: FARR CO., Dept. HVG, 2615 South West Dr., LOS ANGELES 43, CALIF. 1013 S