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[{"$nulls":30},"51350 Security Grilles"]
[{"$nulls":10},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":8},16,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",0.975,"Ak Consts.",null," - ","\""," "," "]
[null,"Enter Duct Height in inches =",{"$nulls":8},16,"Inches",{"$nulls":11},1.7777777777777777,1.5746419270833334,0.75,{"$nulls":4},"Eff. Ak",0.663,"M",0.68]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":8},500,"CFM",{"$nulls":20},"B",0]
[null,"Enter Maximum Air Flow =",{"$nulls":8},1400,"CFM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,1.04398759765625]
[]
[{"$nulls":28}," ",1.8,5.5,13]
[null,"51350 Minimum Security Supply Grille",{"$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,{"$nulls":9},"m","b",null,null," ",null,5]
[null,null,null,281.25,500,0.03378085153389724,"18 - 27 - 41",null,null,1.4287500000000002,235.9737,8.411432031940413,"5.5 - 8.2 - 12.5",12.282702429858848,"*","*",25.282702429858848,22.282702429858848," - ","*",{"$nulls":8},"0 Degrees",0,6.85,{"$nulls":4},6]
[null,null,null,344.53125,612.5,0.05069239033305453,"22 - 32 - 46",null,null,1.7502187500000002,289.0677825,12.622405192930579,"6.7 - 9.8 - 13.8",17.923412106694133,"*","*",30.923412106694133,27.923412106694133,12.923412106694133,"*",{"$nulls":15},7]
[null,null,null,407.8125,725,0.07102424035001893,"26 - 35 - 50",null,null,2.0716875000000003,342.16186500000003,17.685035847154715,"7.9 - 10.6 - 15.0",22.610254572897237,"*","*",35.61025457289724,32.61025457289724,17.610254572897237,"*"]
[null,"16\"",null,471.09375,837.5,0.09477640158479042,"30 - 38 - 53",406.4,null,2.39315625,395.2559475,23.599323994612813,"9.1 - 11.4 - 16.2",26.61965035772217,"*","*",39.61965035772217,36.61965035772217,21.61965035772217,"*",{"$nulls":14}," "]
[null,"x",1.7777777777777777,534.375,950,0.12194887403736901,"33 - 40 - 57","x",0.16516096,2.7146250000000003,448.35003,30.365269635304884,"9.9 - 12.2 - 17.2",30.122932890839923,"*","*",43.12293289083993,40.12293289083993,25.122932890839923,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"16\"",null,597.65625,1062.5,0.1525416577077547,"35 - 42 - 60",406.4,null,3.03609375,501.4441125,37.98287276923092,"10.5 - 12.9 - 18.2",33.23367423058399,"*","*",46.23367423058399,43.23367423058399,28.23367423058399,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,660.9375,1175,0.18655475259594748,"36 - 45 - 63",null,null,3.3575625000000002,554.538195,46.45213339639092,"11.1 - 13.5 - 19.2",36.03104561524997,"*","*",49.03104561524997,46.03104561524997,31.03104561524997,"*",{"$nulls":8},"0 deg",null,-148,64,9,null,"M(Vn)"]
[null,null,null,724.21875,1287.5,0.22398815870194733,"38 - 47 - 66",null,null,3.6790312500000004,607.6322775,55.77305151678488,"11.6 - 14.2 - 20.1",38.57244536600029,"*","*",51.57244536600029,48.57244536600029,33.57244536600029,"*",{"$nulls":9},"Teams",-148,null,null,null,"B"]
[null,null,null,787.5,1400,0.2648418760257543,"40 - 49 - 69",null,null,4.000500000000001,660.72636,65.94562713041283,"12.1 - 14.8 - 20.9",40.900816435760895,"*","*",53.900816435760895,50.900816435760895,35.900816435760895,"*",{"$nulls":8},"Use core area and velocity for sound on this unit."]
[]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]