Document MJrKM13XkmN3G7ErDjKKn6D2M

Air System Equipment Air Dimmers Knowles Mushroom Ventilator Co. Established 1906 All Patents Protected Main Office and Factory Upper Montclair, New Jersey TkiMeich NU-NOTCH Specifications Furnish and install where indicated on drawings or as hereinafter specified (5 in.) (6in.) (7 in.) (8 in.) (10 in.) (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 makes 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 auditoriums. 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 seatr. ing 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 units are required. 7- i Size c Hi 2005 in6 7 8 im*10 Dimensions in Inches Net Wat. AB D E F Lbs. 8W 56 4 7H 1H Hi 6 VA 4H 8H 1H 2*4 U4 7 8H 6*4 OH 2 2 8 10H 9 11H 3 2H 10 14V4 Ares Sq Ft .1364 .1964 .2673 .3491 .5454 27.3 39.3 53.5 69.8 109.0 250 34.2 49.1 66.3 87.3 136.3 Cfm at Velocity of 300 350 400 450 41.0 47.7 54.6 61.2 59.0 68.7 78.6 88.2 80.2 93.5 107.0 120.6 105.0 122.0 140.0 157.0 163.6 191.0 218.0 245.2 ______ 500 68.0 ~tT8 98.0 134.0 107.8 147.4 17-' I * 174.5 192.5 ,209;' 272.5 aflQ.O 3*7:0 The 10* diam. Nu-Notch is the most economically priced Mushroom to use also affordiuf exhaust area and least duct connections. 256 Air System Equipment Registers and Grilles KRUEGER AIR CONDITIONING CORPORATION 19 E. Rillito Tucson, Arizona SUPPLY REGISTERS ANV^LES Series 880 O.B.D. Registers combine double deflection grilles and opposed blade damper units to give complete con trol of air in both planes plus equal dis tribution over entire face of register. Volume control valve is easily adjusted from face. MULTI-SHUTTER REGISTERS Series 800 Multi-Shutter Registers pro vide adjustable front fins for any desired deflection and rear louvres are gang operated. Models have either vertical or horizontal streamlined fins in. deep set on % in. centers. RETURN air GRILLES A fine low-cost register for combination heating and cooling. Vertical fins diffuse air in two directions. Adjustable multilouvre has positive shut-off control. Front fins are spaced in. for greater free area. Series 80 Return Air Grilles, matching units for air supply registers, combine rugged construction and fine appearance. Fins spaced on % in. centers are set at 35 deg angles. Available in horizontal and vertical models. i ROUND CEILING DIFFUSER (left) Features friction-controlled butterfly damper with full 90 deg control operated by central shaft. Available in 6 in. to 14 in. diam with 360 deg air diffusion pattern. PERIMETER REGISTER (center) Series 900 Baseboard Registers feature easy in stallation, a new lever operated damper and attractive appearance. Available in 18 in.. 24 in., and 30 in. lengths. AIR & VOLUME CONTROLS (right) Extractor EX-8 has full adjustable curved blades. Designed to balance air volume and distribute air equally over grille face. KRUEGER--a complete line for every installation 257