Document NNJn7bg4JGvL3mKXy6ar4oBXV

Air System Equipment The Independent Register Co. Establishes 1898 3747 East 93rd Street, Cleveland 5, Ohio AIR CONDITIONING REGISTERS AND GRILLES Rear View Showing Adjustable Deflecting Vanes No. 321A Grille with Deflecting Vanes--With vertical grille bars and horizontal de flecting vanes. The grille bars may be individually adjusted to direct air flows to right or left; and the vanes are made individually adjustable to deflect air flows up or down. i No. 238 Wrought Steel--d-way adjust No. 139 Wrought Steel--Flexible hori able direction of air flow. Flexible ver zontal grille bars, bendable for up, down tical grille bars, multiple valves. or straight air flow. Single valves. b Independent No-Vision Grilles--No. 1312 for Doors, Walls and Partitions The grille bars are "V" shaped; it is impossible to see through the grille from any viewpoint. No. 1312R--With overlapping rim M wide, on all four sides. No. 1312C--With grille core only, stalled with moulding. 1384 il l %"t l E Air System Equipment Air Diffusers Knowles Mushroom Ventilator Co. Established 1906 All Patents Protected Main Office and Factory Upper Montclair, New Jersey 7ki92ofeh 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. Provide under each Air Diffuser one No. 20 Galvanized Iron Sleeve to be set by the heating contractor in conjunction with the general contractor at the time the floor is laid. In concrete floors when sleeves are located on forms fill sleeves with sand before being grouted in, to prevent their distortion. For wood floors --attach the mushrooms to the floor by means of flat head screws. For concrete or similar type floors--by tightening 3 set screws in the collar. (In specifications indicate the desired size and style of top.) 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 jn summer. If too much air is recircu lated, odors will result; and when Bmok- mg is to be allowed, much more new air must be introduced. KNOWLES NU-NOTCH MUSHROOM AIR DIFFUSER For Auditoriums 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 fiat 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 A.S.H.V.E. 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. ; ^JjPtability the KNOWLES Mushroom Air Diffuser. In an auditorium seat- reAui.ring 40,000 cfm, it is desired to use 6 in. dia. NU-NOTCH Mushrooms Hh air velocity of 600 fpm. By referring to the table below, it will be seen that ? in. mushroom will exhaust 120 cfm. Dividing 40,000 cfm by 120 indicates 333 units are required. Size mensions in Inches Net Wgt. B C D E F Lbs. 6 7 8 *10 A 144 56 4 lit n** ih 6 VA AM 1M 2H 1H 7 HA 6*4 lit 2 2 8 10V4 9 lilt 3 2H 10 1114 \AYt The 1 haust ----XU .IVVUl to liUCUiUe * area and least duct connections. Area Sq Ft .1364 .1964 .2673 .3491 .6454 200 27.3 39.3 63.5 69.8 109.0 250 34.2 49.1 66.8 87.3 136.3 Cfm at Velocity of 300 41.0 59.0 80.2 105.0 163.6 350 47.7 68.7 93.5 122.0 191.0 400 54.6 78.6 107.0 140.0 218.0 450 61.2 88.2 120.6 157.0 245.2 500 68.0 98.0 134.0 174.5 272.5 550 74.8 107.8 147.4 192.5 300.0 600 81.6 117.6 160.8 209.4 327.0 1385