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[{"$nulls":30},"13SD Security Grilles"]
[{"$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 Minimum Neck Velocity (greater than 0)=",{"$nulls":8},230,"FPM",{"$nulls":20},"B",0]
[null,"Enter Maximum Neck Velocity =",{"$nulls":8},600,"FPM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.39498272]
[{"$nulls":28}," ",1,3,11]
[null,"13SD Perforated Face Suicide Deterrent Security Supply Grille"]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":27},"Band","Slope 1","Slope 2","Const"]
[null,"Nom","Duct","Neck","Air","Entrained",null,"Nom","Duct","Neck","Air","Entrained",null,null,"Estimated",{"$nulls":20},2]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Duct","Area","Vel","Flow","Pt","Throw","NC","Octave Band, dB",{"$nulls":20},3]
[null,"in","ft²","FPM","CFM","\"WG","ft","mm","m²","m/s","L/s","Pa","m",null,2,3,4,5,6,7,{"$nulls":8},"Pressure Constants",null,null,null," ",null,null,4]
[null,null,null,230,230,0.02863520675499893,"7 - 11 - 22",null,null,1.1684,108.54790200000001,7.130166481994734,"2.2 - 3.3 - 6.7",11.658661883673846,"*","*",24.658661883673844,21.658661883673844," - ","*",{"$nulls":9},"m","b",null,1310," ",null,5]
[null,null,null,276.25,276.25,0.04130943209832535,"9 - 13 - 26",null,null,1.40335,130.37546925,10.286048592483011,"2.7 - 4.0 - 7.9",17.132588345646596,"*","*",30.132588345646596,27.132588345646596,12.132588345646598,"*",{"$nulls":8},"0 Degrees",0,8.682597962766573,null,7.893270875242338,null,null,6]
[null,null,null,322.5,322.5,0.05629944182537066,"10 - 15 - 28",null,null,1.6383,152.2030365,14.018561014517294,"3.1 - 4.7 - 8.5",21.757163412058432,"*","*",34.75716341205843,31.757163412058432,16.757163412058432,"*",{"$nulls":12},"Factor",null,null,7]
[null,"12\"",null,368.75,368.75,0.07360523593613487,"12 - 18 - 30",304.79999999999995,null,1.87325,174.03060375,18.327703748097584,"3.6 - 5.4 - 9.1",25.760900317985673,"*","*",38.76090031798567,35.76090031798567,20.760900317985673,"*",{"$nulls":12},1.1]
[null,"x",1,415,415,0.09322681443061799,"13 - 20 - 32","x",0.09290304,2.1082,195.858171,23.21347679322388,"4.0 - 6.0 - 9.6",29.29093261684848,"*","*",42.29093261684848,39.29093261684848,24.29093261684848,"*",{"$nulls":14}," "]
[null,"12\"",null,461.25,461.25,0.11516417730882,"15 - 22 - 33",304.79999999999995,null,2.34315,217.68573825,28.67588014989618,"4.5 - 6.7 - 10.2",32.447587566929585,"*","*",45.447587566929585,42.447587566929585,27.447587566929585,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,null,null,507.5,507.5,0.1394173245707409,"16 - 24 - 35",null,null,2.5781,239.5133055,34.71491381811449,"4.9 - 7.4 - 10.7",35.30234968862298,"*","*",48.30234968862298,45.30234968862298,30.302349688622982,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,553.75,553.75,0.16598625621638072,"18 - 26 - 37",null,null,2.81305,261.34087275,41.330577797878796,"5.4 - 7.9 - 11.1",37.907956165732784,"*","*",50.907956165732784,47.907956165732784,32.907956165732784,"*",{"$nulls":8},"0 deg",null,-171,68.79,10,null,"M(Vn)"]
[null,null,null,600,600,0.19487097224573943,"19 - 27 - 38",null,null,3.048,283.16844000000003,48.52287208918912,"5.8 - 8.2 - 11.6",40.30442855791448,"*","*",53.30442855791448,50.30442855791448,35.30442855791448,"*",{"$nulls":9},"Teams",-149.7434745141847,null,null,null,"B"]
[{"$nulls":28},"Use core area and velocity for sound on this unit."]
[{"$nulls":30},1310,"add"]
[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",{"$nulls":28},-174,3]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]