Document B8dKk3dMDzbEXQ1bDR8VjrYLJ

250 Air System Equipment s( vouiittm Allen Cooler & Ventilator, Inc. Rochester, Michigan See Sweet's Catalog for further details St Representatives in principal cities Write to factory for catalog Air System Equipment Afa- Vest* aad Rm( VcntflMMi 251 EXHAUSTERS BELTED ROOF EXHAUSTER Ammerman Co., Inc. Stillwater, Minnesota Exhausters Powered or Gravity Underfloor and Overhead Exhaust Systems BACKWARD CURVE DIRECT CONNECTED ROOF RELIEF EXHAUSTERS "I-LINE" LOW SILHOUETTE ROOF FAN Allen 4 `I-L1NE" Roof Fan is designed to meet the architect's demand for an attractive silhouette and the engineer's demand for high efficiency. This is ac complished by use of a circular spun steel hood, and venturi, with baffle so arranged in relation to the pro peller as to provide maximum efficiency with mini mum over-all height. Its appearance and quiet performance recommend it for new or old construc tion, such as schools and offices as well as industrial plants. It is easy to install (no extra base required) p.nH it is easy to lubricate and clean. Available with Direct Drive (420 to 45,000 cfm) or with Belt Drive (4,000 to 31,000 cfm). Special units available to 70,000 cfm. ALLEN STAXAUSTER for Conversions or New Construction Allen Staxauster is a simple, compact, sturdy unit that can be used to convert all types of roof venti lators into powerful exhaust or air supply, units. It is available in a wide range of sizes and capacities to solve almost any ventilating problem, with either Direct Drive or Remote Drive, as shown below. "T-TYPE" LOW VELOCITY ROOF FAN Allen 44T*TYPE" Ventilator is designed for low, one-story, flat-roof, modern buildings. It blends well with modern exteriors and its design and construction assure high efficiency, easy installation and low main tenance. Model T-9 has capacity of 420 cfm at 0 in. SP; Model T-16, a capacity of 600 cfm at 0 in. SP. Low height enables these units to be used for both roof and wall installations. HIGH VELOCITY VERTICAL DISCHARGE FAN Allen Type 4fVD" Roof Fan is designed for use where extremely high discharge velocity prevents the tendency of fumes to short circuit back through build ing openings. -Fabricated of prime zinc-coated iron sheet, welded construction throughout. Automatic wing dampers open with air blast, close weathertight when not operating. Available with Direct Drive, with motor readily accessible, or Remote Drive, with motor in outside housing and enclosed V-belt drive. Ca pacities available to 90,000 cfm. REMOTE DRIVE STAXAUSTER for Corrosive Fumes Allen Remote Drive Staxauster is specially de signed for applications handling fumes, and/or high temperature air. Motor and belt drive are completely isolated from the air stream. ALLEN TYPE C TURBINE VENTILATOR Allen Type "C" Turbine Ventilator is wind driven and economically removes heated air, fumes and dust. Other Allen turbine-type ventilators include powerdriven models for ventilating in calm air conditions. "BCB" Lo-Boy Non-Oyerloading Centrifugal Wheel. Capacity table offers a selection of 16 wheel sizes-- 204 constant speed combinations with tip-speeds as low as 2000 fpm. Unit is exceptionally low in height. Standard construction consists of welded structural frame. Write for special engineers bulletin "BCD Non-Overloading Roof or Wall Exhauster. Designed for op timum performance at lowest pos sible velocities, reduces noise level to an absolute minimum. Motor directly connected to dynamically balanced' wheel eliminates costly maintenance. See Sweet's file for further details "RC" is regular Airxpeler design-- but spun from one piece of metal. Throats may be round up to 42 in., square or rectangular up to 34 in. Constructed to accommodate any size roof opening. May be used as gravity vents. Write for Bulletin. UPBLAST ROOF EXHAUSTERS POWER ROOF EXHAUSTER DISAPPEARING EXHAUST SYSTEMS "PB" or "PFAS" Lo-Boy Wall or Roof Units. Efficient and quiet op eration for low static pressures up to Vi inch. - Rubber grommets are installed around all points where metal contacts metal. Powdered fresh air supply units on "PB" ex hauster with reversed pressure blade to bring fresh air in under power. Under the Floor and Overhead ex haust systems for all makes and models of cars and trucks. Will accommodate flexible metal hose up to six inches in diameter. Write for Bulletin No. 650H. Designed for immediate heat, smoke and fume expulsion. Split disc damper that automatically opens when fan is turned on provides weather proofed units. Direct drive units equipped with totally enclosed ball bearing motors. Belt driven units furnished with motors, out of line of airflow in separate weather proof compartment. Write for Special Bulletin