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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},12,"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},12,"Inches",{"$nulls":11},1,0.4444,0.75,{"$nulls":4},"Eff. Ak",0.8888,"M",2]
[null,"Enter Air Flow (must be greater than 0) =",{"$nulls":8},300,"CFM",{"$nulls":20},"B",0]
[null,"Series =",1320,{"$nulls":5},"Tag =",null,"Cell 5a",{"$nulls":17},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.39498272]
[]
[null,"1320 Maximum Security Supply Grille",{"$nulls":26}," ",1.7,4.7,12]
[null,"Tag : Cell 5a",{"$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,{"$nulls":9},"m","b",null,null," ",null,5]
[null,"12\" x 12\"",1,300,300,0.10455316561587079,"15 - 21 - 29","305 x 305",0.09290304,1.524,141.58422000000002,26.033738238351827,"4.5 - 6.3 - 8.9",25.59657515618919,"*","*",38.59657515618919,35.59657515618919,20.59657515618919,"*",{"$nulls":8},"0 Degrees",0,3.68,{"$nulls":4},6]
[{"$nulls":35},7]
[]
[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",{"$nulls":32}," "]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10.",{"$nulls":26},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991.",{"$nulls":28},"B","CVn","CAn",null,"M(An)"]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog.",{"$nulls":26},"0 deg",null,-165,68.79,10,null,"M(Vn)"]
[null,"5) NC assumes a room absorption of 10dB.",{"$nulls":27},"Teams",-140.7434745141847,null,null,null,"B"]
[{"$nulls":28},"Use core area and velocity for sound on this unit."]
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