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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},20,"Inches",{"$nulls":11},2.2222222222222223,0.9875555555555556,0.75,{"$nulls":4},"Eff. Ak",0.8888,"M",2]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":8},500,"CFM",{"$nulls":20},"B",0]
[null,"Enter Maximum Air Flow =",{"$nulls":8},1300,"CFM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.8777393777777779]
[]
[{"$nulls":28}," ",1,3,11]
[null,"51310 Perforated Face Security Supply Grille",{"$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,{"$nulls":9},"m","b",null," "," ",null,5]
[null,null,null,225,500,0.024912482247324636,"11 - 16 - 32",null,null,1.143,235.9737,6.203208079583835,"3.2 - 4.9 - 9.7",11.469914327150823,"*","*",24.46991432715082,21.46991432715082," - ","*",{"$nulls":8},"0 Degrees",0,7.893270875242338,{"$nulls":4},6]
[null,null,null,270,600,0.035873974436147475,"13 - 19 - 38",null,null,1.3716000000000002,283.16844000000003,8.932619634600721,"3.9 - 5.8 - 11.6",16.916792242766906,"*","*",29.916792242766906,26.916792242766906,11.916792242766908,"*",{"$nulls":15},7]
[null,null,null,315,700,0.04882846520475629,"15 - 22 - 41",null,null,1.6002,330.36318,12.158287835984316,"4.5 - 6.8 - 12.5",21.522061901456784,"*","*",34.52206190145679,31.522061901456784,16.522061901456784,"*"]
[null,"16\"",null,360,800,0.06377595455315108,"17 - 26 - 44",406.4,null,1.8288000000000002,377.55792,15.880212683734618,"5.2 - 7.8 - 13.4",25.511327934051867,"*","*",38.51132793405187,35.51132793405187,20.511327934051867,"*",{"$nulls":14}," "]
[null,"x",2.2222222222222223,405,900,0.08071644248133182,"19 - 29 - 47","x",0.20645120000000003,2.0574000000000003,424.75266,20.098394177851624,"5.8 - 8.8 - 14.2",29.030109953207234,"*","*",42.03010995320724,39.03010995320724,24.030109953207234,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"20\"",null,450,1000,0.09964992898929854,"21 - 32 - 49",508,null,2.286,471.9474,24.81283231833534,"6.5 - 9.7 - 15.0",32.177767728876056,"*","*",45.177767728876056,42.177767728876056,27.177767728876052,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,495,1100,0.12057641407705123,"23 - 35 - 52",null,null,2.5146,519.14214,30.023527105185757,"7.1 - 10.7 - 15.7",35.02517054091037,"*","*",48.02517054091037,45.02517054091037,30.02517054091037,"*",{"$nulls":8},"0 deg",null,-174,68.79,10,null,"M(Vn)"]
[null,null,null,540,1200,0.1434958977445899,"26 - 38 - 54",null,null,2.7432000000000003,566.3368800000001,35.730478538402885,"7.8 - 11.6 - 16.4",37.6246456444922,"*","*",50.6246456444922,47.6246456444922,32.6246456444922,"*",{"$nulls":9},"Teams",-149.7434745141847,null,null,null,"B"]
[null,null,null,585,1300,0.16840837999191455,"28 - 40 - 56",null,null,2.9718,613.53162,41.93368661798672,"8.4 - 12.1 - 17.1",40.015930934063384,"*","*",53.015930934063384,50.015930934063384,35.015930934063384,"*",{"$nulls":8},"Use core area and velocity for sound on this unit."]
[]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]