Document 2R74Xemggr546pG6L521KQ986

Air System Equipment ventiuu^*11 Jenn-Air Products Company, Inc, 1102 Stadium Drive,-Indianapolis 7, Indiana Warehouse stocks in all major cities Roof Exhauster Equipment for Public, Commercial and Industrial Buildings QUIET-TESTED 1 Jenn-Air Quiet-Tested Roof Exhausters are pre-proved under simulated field conditions. Each unit must pass rigid inspection by the critical Vibronic Eye ... is "screened" in Jenn-Air's Sound-Elec Test Chamber to detect noise, vibration. Direct Drive Power Roof Exhauster Axial Roof Exhauster Dependable U-Spring Suspension of Jenn-Air's Direct Drive Roof Exhauster virtually eliminates noise caused by vibration. U-Springs suspend the power assembly, isolate it from the base. Motor and blade are balanced together, elim inating vibration and noise. Heavy Gage All Aluminum Housing . . . Non-Over loading All Aluminum Wheel . . . assure trouble free performance. Low Contour Streamlining meets requirements of modern building design. Jenn-Air's Ball Bearing Motor is lubricated for 10 years of continuous service. The Axial type Jenn-Air Roof Exhauster is recommended for general ventilation work and for duct-type applications where static pressures do not exceed onehalf inch. Special Non Overloading De sign protects against motor failures. Quiet-running pressure-type aluminum blades make this a high cfm-per-dollar value. Same high quality aluminum con struction featured in the Centrifugal type available throughout the Axial series. Centrifugal Wad Exhauster Belt Drive Power' Roof Exhauster In this Quiet-Tested Belt Drive Power Roof Exhauster, Positive Weather-Proof Engineering is combined with trim Low Contour Design. Full Ball Bearing Drive and Motor are mounted out of the air stream. Heavy Gage All Aluminum Con struction gives strength without weight. Exhauster can be quickly, easily, disas sembled for re-assembly on the roof. All models come with a disconnect switch as integral part of the unit. Non-Overload ing Blade, dynamically and statically balanced, also assures long life, smooth, quiet operation. Jenn-Air's Sound-Elec Test Chamber, where every Quiet-Tested Jenn-Air ex hauster is individually checked by the Vibronic Eye in a sound-control room . . . line-lab tested for vibration, sound, motor load and insulation breakdown. Tests take the guess work out of noise control--only units which pass this rigid inspection are accepted for shipment. Jenn-Air Centrifugal Wall Exhausters eliminate most duct work . . . provide a means of ventilation through the wall when roof exhausters would prove un- * suitable or more costly, as in multi-story construction. One single opening through the outer wall permits Wall Ex hauster to be connected directly to the area of ventilation . . . saves valuable interior space, lowers installation costs . . . reduces fire, explosion hazards. Con structed of heavy gage aluminum, ex hausters are completely weather-proof, unusually quiet. Motor is mounted out side the airstream. Has the same NonOverloading characteristics as all other Jenn-Air units. Sound-Elec Test Chamber Jenn-Air Exhausters are rated in accordance with the Standard Text Code by the Texas Engineering Experiment Station. 264 Air System Equipment Air Diffusers Knowles Mushroom Ventilator Co. Established 1906 All Patents Protected Main Office and Factor; Upper Montclair, New Jersey 92u92oteh NU-NOTCH Specifications Furnish and install where indicated on drawings or as hereinafter specified (5in.) (6 in.) (7 in.) (8 in.) (10in.) (Dome Top) (Flat Top) Nu-Notch Cast Iron Mushroom Air Diffusers with recessed notches for the permanent adjustment of mushroom caps at any desired open ing, together with center locking screw feature. Cast iron mushroom, successfully serving in over 5,000 buildings in U. S. and abroad. Provides correct draft-free distribution of air to each individual in any size auditorium, orchestra or bal cony. Close regulation of air--10 differ ent adjustments for all possible condi tions. Easily regulated by part turn of cap, and locked in position by tightening head screw with special key--new feature to prevent tampering. Supplied with dome or flat tops, 5 diameter sizes. Easy, permanent anchorage to wood, concrete or monolithic floors. PROPER auditorium ventilation is now recognized to be a combination of temperature, air motion and distribu tion, humidity, dust, bacteria, odors, and carbon dioxide. Air motion and distribution is second only to tempera ture in importance. The Synthetic Air Chart adopted by the ASHAE takes into account all of these factors and ffiakes it possible to arrive at an average which will show the percentage of ven tilation obtained in any given installa tion. , For nearly a half century KNOWLES has devoted itself to one specialized field --the manufacture of air diffusers for auditorium. Write for free Guide to Distribution of Air in Auditoriums. KNOWLES NU-NOTCH MUSHROOM AIR DIFFUSER For Auditoriums MODERN practice shows that 8 cu ft of fresh air per minute per person is ample to keep the air in an auditorium free of odors; and to maintain body heat and to balance the outdoor heat of a warm summer's day, about 20 cu ft per minute per person must be introduced. The accurate amount becomes an engi neering problem too extended for this outline. Of the 20 cu ft per minute per person introduced, 12 cu ft may be recirculated, economizing heat in winter and cooling in summer. If too much air is recircu lated, odors will result; and when smok ing is to be allowed, much more new air must be introduced. . Adaptability of the KNOWLES Mushroom Air Diffuser. In an auditorium seat- lr\g 2000, requiring 40,000 cfm, it is desired to use 6 in. diam NU-NOTCH Mushrooms with air velocity of 600 fpm. By referring to the table below, it will be seen that a 6 in. mushroom will exhaust 120 cfm. Dividing 40,000 cfm by 120 indicates 333 Size Dimensions in Inches A B c D F! F Net Area Wat. Lf*. Ft 200 250 Cfm at Velocity of 300 350 .400 450 500 550 600 5 m6 m7 m8 mMO 6H 56 4 7H 1H m 6 7H 4H 8U 1H m l H 7 8H m 1H 2 2 8 10H 0 im 3 2V4 10 11% 14V4 .1364 .1964 .2673 .3491 .6454 27.3 39.3 53.6 69.8 109.0 34.2 49.1 66.8 87.3 136.3 41.0 59.0 80.2 105.0 163.6 47.7 68.7 93.5 122.0 191.0 54.6 78.6 107.0 140.0 218.0 61.2 88.2 120.6 157.0 245.2 68.0 98.0 134.0 174.5 272.5 74.8 81.6 107.8 117.6 147.4 160.8 192.5 209.4 300.0 327.0 , ' -th**e<* IO' udiuaumi.. nNuu--nNoovtccnh iiss ttohee qmkossit economically priced Mushroom to use also affordin* the greatest xoaust area and least duct connections. 265