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[{"$nulls":30},"1320 Security Grilles"]
[{"$nulls":10},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":8},16,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",0.4444,"Ak Consts.",null," - ","\""," "," "]
[null,"Enter Duct Height in inches =",{"$nulls":8},16,"Inches",{"$nulls":11},1.7777777777777777,0.7900444444444444,0.75,{"$nulls":4},"Eff. Ak",0.8888,"M",2]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":8},330,"CFM",{"$nulls":20},"B",0]
[null,"Enter Maximum Air Flow =",{"$nulls":8},800,"CFM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.7021915022222223]
[]
[{"$nulls":28}," ",1.7,4.7,12]
[null,"1320 Maximum Security Supply Grille",{"$nulls":33},"Band","Slope 1","Slope 2","Const"]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":27},2]
[null,"Nom","Duct","Neck","Air","Pt","Throw","Nom","Duct","Neck","Air","Pt","Throw",null,"Estimated",{"$nulls":20},3]
[null,"Duct","Area","Vel","Flow",null,null,"Duct","Area","Vel","Flow",null,null,"NC","Octave Band, dB",{"$nulls":13},"Pressure Constants",null,null,null," ",null,null,4]
[null,"in","ft²","FPM","CFM","\"WG","ft","mm","m²","m/s","L/s","Pa","m",null,2,3,4,5,6,7,{"$nulls":9},"m","b",null,null," ",null,5]
[null,null,null,185.625,330,0.0400283428203574,"12 - 19 - 31",null,null,0.942975,155.74264200000002,9.967057362268992,"3.8 - 5.6 - 9.4",13.753681317819588,"*","*",26.753681317819588,23.753681317819588," - ","*",{"$nulls":8},"0 Degrees",0,3.68,{"$nulls":4},6]
[null,null,null,218.671875,388.75,0.05554954869616318,"15 - 22 - 33",null,null,1.110853125,183.46955175,13.831837625344631,"4.4 - 6.6 - 10.2",18.648534349600045,"*","*",31.648534349600045,28.648534349600045,13.648534349600045,"*",{"$nulls":15},7]
[null,null,null,251.71875,447.5,0.07360813431514415,"17 - 25 - 36",null,null,1.27873125,211.1964615,18.328425444470895,"5.1 - 7.6 - 10.9",22.853160591276026,"*","*",35.85316059127602,32.85316059127602,17.853160591276026,"*"]
[null,"16\"",null,284.765625,506.25,0.09420409967730028,"19 - 27 - 38",406.4,null,1.4466093750000002,238.92337125,23.45682081964777,"5.8 - 8.2 - 11.6",26.538378235380964,"*","*",39.53837823538096,36.53837823538096,21.538378235380964,"*",{"$nulls":14}," "]
[null,"x",1.7777777777777777,317.8125,565,0.11733744478263168,"21 - 29 - 40","x",0.16516096,1.6144875,266.650281,29.21702375087529,"6.4 - 8.7 - 12.3",29.818520119118904,"*","*",42.8185201191189,39.8185201191189,24.818520119118904,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"16\"",null,350.859375,623.75,0.1430081696311383,"23 - 30 - 42",406.4,null,1.7823656250000002,294.37719075,35.609034238153434,"7.1 - 9.1 - 12.9",32.77388372187691,"*","*",45.77388372187691,42.77388372187691,27.773883721876917,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,383.90625,682.5,0.17121627422282007,"26 - 31 - 44",null,null,1.95024375,322.1041005,42.6328522814822,"7.8 - 9.5 - 13.5",35.46302908010277,"*","*",48.46302908010277,45.46302908010277,30.463029080102775,"*",{"$nulls":8},"0 deg",null,-165,68.79,10,null,"M(Vn)"]
[null,null,null,416.953125,741.25,0.2019617585576771,"27 - 33 - 46",null,null,2.118121875,349.83101025,50.28847788086159,"8.1 - 9.9 - 14.0",37.929979544971516,"*","*",50.929979544971516,47.929979544971516,32.929979544971516,"*",{"$nulls":9},"Teams",-140.7434745141847,null,null,null,"B"]
[null,null,null,450,800,0.2352446226357093,"28 - 34 - 48",null,null,2.286,377.55792,58.575911036291615,"8.4 - 10.3 - 14.6",40.208667598795486,"*","*",53.208667598795486,50.208667598795486,35.208667598795486,"*",{"$nulls":8},"Use core area and velocity for sound on this unit."]
[]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]