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IN Air System Equipment Air Paten and Ctesaers American Air Filter Company, Inc. 673 Central Avenue, Louisville 8, Ky. Aubbican Am of Canada, Pro., Montbkal, P. Q. American Air Filter Co., Inc. Air System Equipment Air Filters and Cleaners THE COMPANY: The American Air Filter Company, Inc., is recognized in ternationally as an authority on air filtration and dust control. In 30 years, Its leadership and scientific "know how" have been responsible for installations of AAF equipment in every industrial ized part of the world. Because its con tinuous research, high engineering stand ards and exclusive specialization have been consistently maintained, AAF. equipment is used by leading companies in nearly every industry and is specified by leading architects and engineers for use in commercial and industrial air conditioning. The American Air Filter Company, Inc., manufactures a complete line of air filtering and dust control equipment. A few representative types are shown here. AAF's years of experience and the scope of its knowledge dealing with the elimination of air-borne particles in every form insures maximum efficiency in application, design, manufacture and installation . . . with a minimum of field engineering. Write AAF on all problems of air filtration and dust con trol, or its Herman Nelson Division (see pages 1284-1285) on heating or ventilat ing problems. AAF AIR CLEANING PRODUCTS Electro-Matic Self-Cleaning Electronic ROLL-O-MATIC Renewable Media Fil Precipitator--The Electro-Matic Precip ter--An automatic air filter featuring a itator is an automatic electronic pre low cost, renewable media filtering cur cipitator combining advanced principles tain of bonded glass fibers supplied in of electronic air cleaning with an ex convenient roll form. The media, clusive self-cleaning principle. It elimi mounted at top of filter, moves down the nates the necessity of shutting down the face of the ROLL-O-MATIC and is re filter for manual cleaning, minimizes the need for personal attention and permits continuous high-efficiency oper ation. It also allows the Electro-Matic filter to be built in standardized selfcontained sections, easy to install and with all exposed parts of the filter casing electrically grounded for the protection of operating personnel. Send for Bul rolled on a driven spool at bottom. Intro duction of clean material to maintain desired operating resistance is controlled by an automatic time switch. ROLL-0MATIC's maintenance-free operation provides continuous, high efficiency cleaning at less than half the operating cost of a disposable type filter of equal letin No. 250. capacity. Send for Bulletin 248. Electro-Cell Electronic Filter Electro-PL Electro-malic Filter Unlti-Dvty Automatic Filter Electro-Cell Electronic Filter--A plate type electronic precipitator offering sim plified design, improved performance and maintenance advantages. Built in verti cal sections 2-ft and 3-ft wide. Hinged ionizers extend the full height of the sections for easy access. Collector as semblies may be removed for individual cleaning--washed in place manually--or, with the addition of Type "H" Washer, cleaned automatically by traveling water sprays. Write for Bulletin No. 252. Electro-PL: An exclusive dry-type elec tronic air filter with charged Airmat collector element which combines air filtration and electronic precipitation in a single unit. Gives intermediate effici ency at lower cost, when the need for super-clean air is not indicated. However, it has twice the efficiency of un charged dry-type filters. Available in straight Bank or "V" arrangement to meet virtually any space or capacity recimremt'M, Send for Engineering Bul- AMER-glas Replaceable Unit Filters. A new viscous impingement type for eliminating atmospheric dust from forced air heating systems. The highly efficient filtering media consists of continuous, curled and interlaced, extremely fine glass filaments, bonded with thermo plastic to form a thick resilient pad. The pad is sprayed with a special Visco sine and placed in a fiberboard casing between perforated metal grilles. The AMER-glas is nonflammable, sanitary and odorless and the Viscosine remains in a fluid-jell state for the life of the filter. Available in 15 sizes. Write for Bulletin No. 211-A. Afrmat Type PL-24--Airmat filters use standard Airmat medium, renewable af ter collecting dust load. Used both for comfort and industrial air conditioning. Available with unit frames to be set up to meet any capacity requirement or space condition. Send for Bulletin No. -.a.mamg ieatures of performance "es|En and will accommodate either armored screen panels or die stamped uvre panels available in three types, era advantage of uniformly constant mA SU. operating resistance ana automatic operation. Ideal for ven- 4v'im a"d a'r conditioning service. for Bolt l-Inx?ny size or capacity. Send ,or bulletin No. 24t-A. Type HV-2 Filter: A high capacity, lowresistance unit designed for velocities up to 500 fpm. Exclusive pyramid pocket media design eliminates through-air pas sages and gives uniformly high efficiency over wide range of air velocities. HV-2 has large dust capacity, long life, and decided advantages where space is limited. Available in three designs. Write for Engineering Bulletin No. 20S. American Type HV-S 1309 Airmat Type PL-S4