Document 0JwQaVD88kXbX7kd470eeeaGd

Air System Equipment vents THE G. C. BREIDEP.T CO. P.O. Box 1190, San Fernando, Calif. Representstires in AU Principal Cities POSITIVE VENTILATION GUARANTEED... NO MATTER WHICH WAY THE WIND BLOWS! Breidert AIR-X-HAUSTEIl. ... famous gravity-flow ventilator developed from principles of aerodynamics; proven by years of use in all types of application. Transforms winds from straight-downwardj,o SO deg upward into positive suc tion--without a single moving part! Trouble-free, maintenance-free, weather proof. Guaranteed backdraft-proof, barring internal negative pressures. HORIZONTAL DISCHARGE ELIMINATES DOWN-DRAFTS! NEW! SPECIAL VENTILATORS FOR FORCED-AIR SYSTEMS! Breidert POWAIR-X-HAUSTER.......... Unique power unit provides pleasing, unobtrusive appearance on top of any roof. Discharges air on a straight hori zontal plane--preventing conventional back pressures and roof deterioration caused by downward discharge of ordi nary power ventilators. Downdraft-proof against winds from any direction when fan is off (barring internal negative pres sure). Operates as a gravity ventilator when power is off! Breidert "AIR-OUT* * . . . now available to meet the special requirements of forced-air duct systems. It's the same low-silhouette Powair-X-Hauster head (at left) without motor and fan assembly. Specially designed to provide an internal static resistance much lower than that of ordinary discharge heads. Like the Powair-X-Hauster, the new Air-Out discharges fumes horizontally--and boasts ah architecturally-pleasing ap pearance to enhance any roof top! MORE VENTILATION PER DOLLAR! INSIST ON CERTIFIED ' CAPACITY RATINGS Based on Variable Wind Conditions This is your assurance that the ventila tors you specify will perform efficiently in actual use. Capacity ratings, of Breidert ventilators are certified; by Pittsburgh Testing Laboratory, Pittsburgh, Pa. All tests were made with winds It takes fewer Brei dt_he_er_t j_ov_be_n_ttihl_aatonrscotnovedno use the same number of smaller-size Breiderts to do the job of con striking the ventilator head at all direc* tions from straight-downward to 30 dag WtioTn?aTl TTver nrt*ilantotrjs of ventional ventilators. upward--at both high and low velocities. WtheRsaImTeEsizFeO. R ENGINEERING.DATA BOOK-44 pages of Insolation photos,'certi- hed capacity ratings, complete specifications. >?/'- 224 Air System Equipment Air Vents and Roof Ventilators Hirschman-Pohle Co., Inc. Since 1908 200 Lent Ave. . . . LeRoy, N. Y. Sales Representatives In Principal Cities Manufacturers of all types of Power and Gravity Roof Ventilators Minimum Overall Height . (So Desirable for Modern One-Story School Buildings) Roof opening "A" Cowl height "C" 10* 12* 5H* 6* 15* 7* 18* 20* 24* 8* OH* 11* 30* 12* 36* 14* 42* 16* The Hirschman Tjpe "CAF" Electric ventilator shown has been designed in response to the demand for the ABSOLUTE MINIMUM IN OVERALL HEIGHT ABOVE THE ROOF LINE, and as standard construction uses our INSULATED DOUBLE SHELL STEEL CURB of any of the several types for any kind of roof deck. Fan and motor assembly available for a wide range of capacities at the lower static pres sures. The companion Type "CA" gravity or pressure relief ventilator (not shown) uses the same general construction minus the fan and motor. Either type subject to numerous modifications to meet the needs of any building project. -4 Type LAC STATICK Power Roof Ventilator This model features the damper housing as an integral part of the ventilator where the damper is accessible for clean ing. It shows the electric damper control mounted in the motor chamber where it is also readily accessible because of the hinged cowl. Our Type "LAC" STATICK Power ventilator designed for efficient exhaust at either low or high static pressure, using non-overloading backward curved blade centrifugal an, available in many sizes for almost any required capacity within reason. The Type "LC" STATICK Power ventilator (not shown) uses a similar construc tion minus the damper housing. Capacity ratings for the STATICK Power Ventilator have been checked and ap proved by PPMA for use of the Certified Rating Label. See Sweetfs Architectural, Engineering! or Industrial Construction Files. Complete data on any or ail types gladly furnished on request. 225