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Air Diffusers and Dampers Knowles Mushroom Ventilator Co. * 41 North Moore Street, New York ^( Knowles Air Diffusers for Auditoriums of Theatres, Churches, Schools ORIGINAL---------- RELIABLE---------STANDARD Giving Satisfactory Service in Over 4,000 Installations PRODUCTS:--Cast-Iron and All-Steel Adjustable Mushroom Ventilators; Aisle Hood, Tu-Way Air Deflectors; Round and Oblong Gallery Riser Vents CTO Volve--The Improved Mushroom Air Diffuser The newest Knowles product. An up-to-date mechanically correct ,air unit of fixed height made of HEAVY steel, with strong supports bearing across 1-in. flange. Easy to regulate and install and low in price. Combines high efficiency with convenient adjustment afford ing finest control of air by simply turning screw on TOP of CAP. Can be positively locked at desired adjustment by side screw--is noiseless and made so that it cannot be taken apart before or after installation--an exclusive feature. Quick Anchorage to Wood or Concrete floors in one piece--Made in 6-in. and 8-in. diameter sizes--Same capacities as Nu-Notch type (see table below). Knowles 7hiffJ)x>fch Mushroom Ventilator or Air Diffuser The ideal cast-iron mushroom. Head has three outer bearings and is absolutely rigid. Ten recessed notches give close regulation of air. Locked into positive adjustment by tightening head screw with special key provided--a new feature to prevent tampering by unauthorized persons. Supplied with-dome or flat tops. Three screw holes in floor flange for fastening to wood, or three angle L lugs for setting in concrete, or three tapped holes in floor collar for fastening with set-screws to sleeve. Size 6* " V" 8* 44 10* 41 Cu. Ft. per Min. at 300 ft. Vel. 42 60 81 10S 165 Area. Sq. Ft. 0.1364 0.1964 0.2673 0.3491 0.5454 Weight Lbs. 3.50 4.25 5.75 , 8.00 11.75. Specifications--Furnish and install where in dicated on drawings or as hereinafter specified (5-in.), (6-in.), (7-in.), (8-in.). (10-in.). (Dome Top). (Flat Top). Nu-Notch Cast-Iron Mushroom Air Diffusers with recessed notches for the per manent adjustment of mushroom caps at anydesired opening together with center locking screw feature as manufactured by Knowles Mushroom Ventilator Co., New York. N. Y. Knowles /)isc~oc Gallery Riser Ventilators are designed to insure better control of air. Round holes in the gallery risers do not weaken the construction but, on the contrary, with the cast-iron rings it is actually strengthened. The cast-iron grille is quickly inserted and locked by a simple twist motion--no bolts, screws or springs. Furnished with or without damper to fit same rings. Made in Four Sizes (See Booklet). Tu - Way Air Deflectors are designed to deliver maximum area with minimum fixed height. The air is discharged at.iofA sides along the row of seats. Heavy CastIron-- Ornamental design -- Adjustable double-wing curved damper deflects air down ward. Fine, positive adjust " -CAorr Lry ment--Rattleproof, noiseless. A DEVICE THAT DELIVERS THE FULL AREA OF FLOOR OPENING. Floor opening 6J4 PATENTED by 8inches--Area XA Sq. Ft. --100 CFM at 300 Velocity. Standard Aisle Hood (Cast-Iron) Air Deflectors are used li--z to throw the fresh air out into the aisles in one direction. A curved damper reduces friction loss. . Large size: 8 in. long, 6 in. wide, 6 in. high; area sq. ft.; Small size: 8 in. long, 4J4 in. wide, \XA. in. high; area-J4 sq. ft. Send for New Booklet of Complete Engineering Data or Samples 766 J-> Distributors: New York Boston Philadelphia Washington Chicago Cleveland Bcefalo Uni-Flo Corporation Detroit, Michigan AIR DISTRIBUTION OUTLETS for the AIR CONDITIONING INDUSTRY Air Diffusers Distributors: Dallas St. Louis Los Angeles Portland, Ore. Richmond, Va. Atlanta Miami Urn-fib mr-ttte COMBINATION LIGHTING AND CEILING DISCHARGE OUTLETS Performance--Uni-Flo Airlite was developed to meet the architects' and engineers' requirements for a combination ceiling discharge outlet or return-air outlet incorporating a lighting fixture. It is so designed that when air is discharged from the outlet, aspiration is created which causes the air at the floor to be drawn up to the outlet and into the discharge air stream. ;- The air is diffused while passing through the outlet so that at the face of the outlet the discharged air rapidly mixes with the aspirated room air, resulting in uniform tem perature control. Patent Pending SIDEWALL AIR DISTRIBUTION OUTLETS Aspirator Type "2BM" for Short Distance Air Distribution. Aspirator Type "5A" for Medium Distance'Air Distribution. Aspirator Type "3K" for Long Dis tance Air Distribution. Volume Control Dampers. Literature Upon Request 767