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[{"$nulls":30},"1320 Security Grilles"]
[{"$nulls":10},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":8},9,"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},9,"Inches",{"$nulls":11},0.5625,0.249975,0.75,{"$nulls":4},"Eff. Ak",0.8888,"M",2]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":8},200,"FPM",{"$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,0.22217778000000002]
[{"$nulls":28}," ",1.7,4.7,12]
[null,"1320 Maximum Security Supply Grille"]
[null,"IP Data",{"$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,200,112.5,0.046468073607053684,"7 - 11 - 18",null,null,1.016,53.0940825,11.570550328156367,"2.3 - 3.4 - 5.5",10.984482713582894,"*","*",23.984482713582892,20.984482713582892," - ","*",{"$nulls":9},"m","b",null,null," ",null,5]
[null,null,null,250,140.625,0.07260636501102138,"9 - 14 - 20",null,null,1.27,66.367603125,18.078984887744326,"2.8 - 4.3 - 6.1",17.650922508407078,"*","*",30.650922508407078,27.650922508407078,12.65092250840708,"*",{"$nulls":8},"0 Degrees",0,3.68,{"$nulls":4},6]
[null,null,null,300,168.75,0.10455316561587079,"11 - 16 - 22",null,null,1.524,79.64112375,26.033738238351827,"3.4 - 4.7 - 6.7",23.09780042402319,"*","*",36.09780042402319,33.09780042402319,18.09780042402319,"*",{"$nulls":15},7]
[null,"9\"",null,350,196.875,0.14230847542160188,"13 - 17 - 24",228.6,null,1.778,92.91464437500001,35.43481037997887,"4.0 - 5.1 - 7.2",27.70307008271307,"*","*",40.70307008271307,37.70307008271307,22.70307008271307,"*"]
[null,"x",0.5625,400,225,0.18587229442821473,"15 - 18 - 25","x",0.052257960000000006,2.032,106.188165,46.28220131262547,"4.5 - 5.5 - 7.7",31.69233611530815,"*","*",44.69233611530815,41.69233611530815,26.69233611530815,"*",{"$nulls":14}," "]
[null,"9\"",null,450,253.125,0.2352446226357093,"16 - 19 - 27",228.6,null,2.286,119.461685625,58.575911036291615,"4.7 - 5.8 - 8.2",35.21111813446349,"*","*",48.21111813446349,45.21111813446349,30.21111813446349,"*",{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,null,null,500,281.25,0.29042546004408554,"16 - 20 - 28",null,null,2.54,132.73520625,72.3159395509773,"5.0 - 6.1 - 8.7",38.35877591013234,"*","*",51.35877591013234,48.35877591013234,33.35877591013234,"*",{"$nulls":10},"B","CVn","CAn",null,"M(An)"]
[null,null,null,550,309.375,0.3514148066533434,"17 - 21 - 30",null,null,2.794,146.008726875,87.5022868566825,"5.2 - 6.4 - 9.1",41.206178722166655,"*","*",54.206178722166655,51.206178722166655,36.206178722166655,"*",{"$nulls":8},"0 deg",null,-165,68.79,10,null,"M(Vn)"]
[null,null,null,600,337.5,0.41821266246348315,"18 - 22 - 31",null,null,3.048,159.2822475,104.1349529534073,"5.5 - 6.7 - 9.5",43.80565382574848,"*","*",56.80565382574848,53.80565382574848,38.80565382574848,"*",{"$nulls":9},"Teams",-140.7434745141847,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}," "]