Document qa6dpaz2K5Bq7vGgrNMQ7m5dE

Air System Equipment Air Diffusers Knowles Mushroom Ventilator Co. Established 1906 All Patents Protected Main Office and Factory Montclair, New Jersey 92u92pfch. NU-NOTCH Specifications KNOWLES NU-NOTCH Furnish and install where indicated on drawings or as hereinafter specified (5 in.) (6 in.) (7 in.) (8 in.) (10 in.) (Dome MUSHROOM AIR DIFFUSER 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 For Auditoriums 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 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 pe 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 Cast iron mushroom, successfully serving in over 4000 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 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 over a quarter of a century KNOWLES has devoted itself to one specialized field--the manufacture of air diffusers for auditoriums. Write for free Guide to Distribution of must be introduced. Air in Auditoriums. Adaptability of the KNOWLES Mushroom Air Diffuser. In an auditorium seating 2000, requiring 40,000 cfm, it is desired to use 6 in. dia. NU-NOTCH Mushrooms with air velocity of 600 fpm. Dimensions in Inches Net Area Cfm at Velocity of Size w*t. Sq A B C D E F Lbs. Ft 200 250 300 350 400 450 500 550 600 5 6 U 1 Ya m 5 6 4 .1364 27.3 34.2 41.0 47.7 54.6 61.2 68.0 74.8 81.6 6 7H m IK IK 6 m 4H .1964 39.3 49.1 59.0 68.7 78.6 88.2 98.0 107.8 117.6 7 8 10 8K 1W 2K IK 7 KVi 9% 2 2 8 10H 9 UK 1H 3 2K 10 UK 14K .2673 53.5 66.8 80.2 93.5 107.0 120.6 134.0 147.4 160.8 .3491 69.8 87.3 105.0 122.0 140.0 157.0 174.5 192.5 209.4 .5434 109.0 136.3 1G3.6 191.0 21S.0 245.2 272.5 300.0 327.0 1222 Air System Equipment . ggggf" The Independent Register Co. Established 1898 3747 East 93rd Street, Cleveland 5, Ohio AIR CONDITIONING REGISTERS AND GRILLES A ' ,,,,__ _ ------ r.r--..i u vcimcw grme oars ana Horizontal deflecting vanes. The grille bars may be individually adjusted to direct air flows to downr Ieft; ^ the VanGS ^ madC individualIy adjustable to deflect air flows up or No. 238 Wrought Steel--4-way adjust able direction of air flow. Flexible verti cal grille bars, multiple valves. No. 139 Wrought Steel--Flexible hori zontal grille bars, bendable for up, down or straight air flow. Single valves. 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 % in. wide, on all four sides. R 1223 c No. 1312C--With grille core only, in stalled with moulding.