Document BR7jeX9ea19V3Lrb85eMVoZeE

Air System Equipment Grfiifs"8 The Independent Register Co. Established 1898 3747 East 93rd Street, Cleveland 5, Ohio AIR CONDITIONING REGISTERS AND GRILLES No. SS1A-HMV Tandem With these grilles, compound deflections of air flows can be obtained with ac curacy and certainty. The directional adjustment can be made at the time of installing or after the grille is in position. Each vertical bar on the front may be individually adjusted for air flow right" or left. The HMV valves on the back may be adjusted by the levers in front so as to direct the air flow up or down, or they may be fully closed. If width exceeds 24 in. the valves are made tandem as illustrated, above. Adjustable Vertical Front Bars. Adjust able Horizontal Rear Bars. Key Control opposed blades for volume control attached. No. SlID-WG Bars Fixed Down These grilles are designed for com mercial installations. Style No. 311D-WG illustrated has grille bars set permanently at approximately 35 deg. down. Othef models available have grille bars set for straight flow. No. 7 Rear View Opposed blades for volume control. No. 60A For floor installations. Bars are set to diffuse the air up and out to both sides. Famous ` `Fabrikated * ' construction, excelling in rigidity, open area and fine appearance. Size shown 2x 14. Other sizes are made and comply with code requirements of NWAH and ACA. 1448 Air System Equipment Air Diffusers Knowles Mushroom Ventilator Co. Established 1906 All Patents Protected Main Office and Factory Upper Montclair, New Jersey 7ki92cfc)i NU-NOTCH Specifications Furnish and install where indicated 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 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 regulatioiTof-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 ASHVE 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 seat ing 2000, requiring 40,000 cfm, it is desired to use 6 in. dia. 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. Size 5 6 7 8 *10y cDimensions in Inches Net Wgt. AB D E F Lbs. 6K 56 4 7H 1H m 6 VA m 8M 2H 1H 7 8H 6H ion9H 1H 2 2 8 9 nn11M l1yHg o3 &27W1 i1u0 uys n1y4Va4 Area Sq Ft .1364 .1964 .2673 .3491 .5454 Cfm at Velocity of 200 27.3 39.3 53.5 69.8 1iu0y9..v0 250 34.2 49.1 66.8 87.3 m13u6..v3 300 41.0 59.0 80.2 105.0 16w3.v6 350 47.7 68.7 93.5 122.0 191.0 400 450 500 550 600 54.6 61.2 68.0 74.8 81.6 78.6 88.2 98.0 107.8 117.6 107.0 120.6 134.0 147.4 160.8 140.0 157.0 174.5 192.5 209.4 -2--1--8---.-0 ---2--4--5---.-2------2--7--2---.-5------3--0--0---.-0-----3---2--7--.--0- * Th 10* dia. Nu-Notch is the most economically priced Mushroom to use also affording the greatest ex haust area and least duct connections. 1449