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[{"$nulls":30},"1330 Security Grilles"]
[{"$nulls":10},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":8},14,"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},14,"Inches",{"$nulls":11},1.3611111111111112,1.3270833333333334,0.75,{"$nulls":4},"Eff. Ak",0.73125,"M",0.75]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":8},375,"CFM",{"$nulls":20},"B",0]
[null,"Enter Maximum Air Flow =",{"$nulls":8},1000,"CFM",{"$nulls":16},"Throw Zones",{"$nulls":6},"Ac*Eff Ak = "]
[{"$nulls":29},"c(ii)","c(iii)","c(iv)",null,null,null,0.9704296875]
[]
[{"$nulls":28}," ",1.8,8,11.3]
[null,"1330 Medium/Minimum Security Supply Grille",{"$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,{"$nulls":9},"m","b",null,null," ",null,5]
[null,null,null,275.51020408163265,375,0.0324161107597248,"12 - 22 - 31",null,null,1.399591836734694,176.980275,8.071611579171476,"3.6 - 6.7 - 9.4",10.561583368225582,"*","*",23.56158336822558,20.56158336822558," - ","*",{"$nulls":8},"0 Degrees",0,6.85,{"$nulls":4},6]
[null,null,null,332.9081632653061,453.125,0.04732977282800094,"17 - 24 - 34",null,null,1.691173469387755,213.85116562500002,11.785113434172233,"5.2 - 7.3 - 10.3",16.251372499075824,"*","*",29.251372499075824,26.251372499075824,11.251372499075826,"*",{"$nulls":15},7]
[null,null,null,390.3061224489796,531.25,0.06505733339972544,"21 - 26 - 37",null,null,1.9827551020408163,250.72205625,16.199276016531634,"6.5 - 7.9 - 11.2",21.033844531366423,"*","*",34.03384453136643,31.033844531366423,16.033844531366423,"*"]
[null,"14\"",null,447.7040816326531,609.375,0.08559879247489828,"23 - 28 - 39",355.59999999999997,null,2.2743367346938776,287.592946875,21.31409932624967,"6.9 - 8.5 - 12.0",25.158961848975633,"*","*",38.158961848975636,35.158961848975636,20.158961848975633,"*",{"$nulls":14}," "]
[null,"x",1.3611111111111112,505.1020408163265,687.5,0.10895415005351942,"24 - 30 - 42","x",0.12645136,2.565918367346939,324.4638375,27.129583363326336,"7.4 - 9.0 - 12.7",28.78578789766986,"*","*",41.78578789766986,38.78578789766986,23.78578789766986,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"14\"",null,562.5,765.625,0.13512340613558896,"26 - 31 - 44",355.59999999999997,null,2.8575000000000004,361.334728125,33.64572812776165,"7.8 - 9.5 - 13.4",32.02183372490508,"*","*",45.02183372490508,42.02183372490508,27.021833724905076,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,619.8979591836735,843.75,0.16410656072110677,"27 - 33 - 46",null,null,3.1490816326530617,398.20561875000004,40.862533619555585,"8.1 - 10.0 - 14.1",34.9431790970752,"*","*",47.9431790970752,44.9431790970752,29.9431790970752,"*",{"$nulls":8},"0 deg",null,-159,69.23,10,null,"M(Vn)"]
[null,null,null,677.2959183673469,921.875,0.19590361381007293,"28 - 34 - 49",null,null,3.440663265306122,435.076509375,48.77999983870816,"8.5 - 10.4 - 14.8",37.605643870516744,"*","*",50.605643870516744,47.605643870516744,32.605643870516744,"*",{"$nulls":9},"Teams",-159,null,null,null,"B"]
[null,null,null,734.6938775510204,1000,0.23051456540248738,"29 - 36 - 51",null,null,3.7322448979591836,471.9474,57.39812678521936,"8.9 - 10.9 - 15.4",40.05139870343562,"*","*",53.05139870343562,50.05139870343562,35.05139870343562,"*",{"$nulls":8},"Use core area and velocity for sound on this unit."]
[]
[]
[null,"1)  Throw values are given for terminal velocities of 150, 100, and 50 fpm (0.75,0.5 and 0.25 m/s), Isothermal Conditions"]
[null,"2) Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"4) Octave Band data was estimated using the guidelines stated in the Engineering Section of Krueger's Catalog."]
[null,"5) NC assumes a room absorption of 10dB."]
[{"$nulls":41}," "]