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[{"$nulls":30},"1310 Security Grilles"]
[{"$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 Neck Velocity (greater than 0)=",{"$nulls":8},230,"FPM",{"$nulls":20},"B",0]
[null,"Enter Maximum Neck Velocity =",{"$nulls":8},620,"FPM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.7021915022222223]
[{"$nulls":28}," ",1,3,11]
[null,"1310 Perforated Face Security Supply Grille"]
[null,"IP Data",{"$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,230,408.88888888888886,0.026032006140908115,"10 - 15 - 29",null,null,1.1684,192.97404799999998,6.481969529086121,"3.0 - 4.5 - 8.9",11.157436615839845,"*","*",24.157436615839845,21.157436615839845," - ","*",{"$nulls":9},"m","b",null," "," ",null,5]
[null,null,null,278.75,495.55555555555554,0.038236815730777994,"12 - 18 - 35",null,null,1.41605,233.876156,9.520967116963721,"3.6 - 5.4 - 10.5",16.900510100096813,"*","*",29.900510100096813,26.900510100096813,11.900510100096813,"*",{"$nulls":8},"0 Degrees",0,7.893270875242338,{"$nulls":4},6]
[null,null,null,327.5,582.2222222222222,0.05278063059831335,"14 - 21 - 38",null,null,1.6637000000000002,274.778264,13.142377018980024,"4.2 - 6.3 - 11.4",21.715564400899115,"*","*",34.71556440089911,31.715564400899115,16.715564400899115,"*",{"$nulls":15},7]
[null,"16\"",null,376.25,668.8888888888888,0.06966345074351417,"16 - 24 - 40",406.4,null,1.91135,315.680372,17.34619923513503,"4.9 - 7.3 - 12.2",25.86120780291431,"*","*",38.86120780291431,35.86120780291431,20.86120780291431,"*"]
[null,"x",1.7777777777777777,425,755.5555555555555,0.08888527616638049,"18 - 27 - 43","x",0.16516096,2.1590000000000003,356.58248000000003,22.132433765428743,"5.5 - 8.2 - 13.0",29.501053274350557,"*","*",42.501053274350554,39.501053274350554,24.501053274350557,"*",{"$nulls":14}," "]
[null,"16\"",null,473.75,842.2222222222222,0.11044610686691228,"20 - 30 - 45",406.4,null,2.40665,397.484588,27.50108060986116,"6.1 - 9.2 - 13.7",32.74520982471752,"*","*",45.74520982471752,42.74520982471752,27.745209824717524,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,null,null,522.5,928.8888888888888,0.13434594284510962,"22 - 33 - 47",null,null,2.6543,438.386696,33.452139768432296,"6.7 - 10.1 - 14.4",35.671334994318485,"*","*",48.671334994318485,45.671334994318485,30.67133499431849,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,571.25,1015.5555555555555,0.1605847841009723,"24 - 35 - 50",null,null,2.9019500000000003,479.288804,39.9856112411421,"7.4 - 10.7 - 15.1",38.33625397381881,"*","*",51.33625397381881,48.33625397381881,33.33625397381881,"*",{"$nulls":8},"0 deg",null,-174,68.79,10,null,"M(Vn)"]
[null,null,null,620,1102.2222222222222,0.18916263063450053,"26 - 37 - 52",null,null,3.1496000000000004,520.190912,47.10149502799063,"8.0 - 11.1 - 15.7",40.78280309677449,"*","*",53.78280309677449,50.78280309677449,35.78280309677449,"*",{"$nulls":9},"Teams",-149.7434745141847,null,null,null,"B"]
[{"$nulls":28},"Use core area and velocity for sound on this unit."]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]