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[{"$nulls":28},"680/6880-30 H or V, 5680,56880-30 H or V Supply Grille"]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},29,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",1,null,null," - ",null,"based on","KECdata"]
[null,"Enter Duct Height in inches =",{"$nulls":6},29,"Inches",{"$nulls":11},5.840277777777778,5.542100694444445,0.75]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":6},475,"FPM"]
[null,"Enter Maximum Neck Velocity =",{"$nulls":6},1300,"FPM",{"$nulls":16},"Throw Zones"]
[{"$nulls":26},"Blade angle","c(ii)","c(iii)","c(iv)"]
[{"$nulls":26},0,2.1907862171648422,6.688057526849242,17.30413919808573]
[null,"680/6880-30 H or V, 5680/56880-30 H or V Supply Grille",{"$nulls":24},15,1.7692756480075045,5.766403120735049,15.661279849986391]
[null,null,null,"IP Data",{"$nulls":22},30,1.4008479535092442,4.971758214897968,14.171130584432735,{"$nulls":4},"Kselect type",{"$nulls":4},"KEC Constants"]
[null,"Nom","Duct ","Neck","Air","0°",null,"15°",null,"30°",{"$nulls":25},"c(ii)","c(iii)","c(iv)",null,"Slope"," 0Const","15 const","30 const"]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB",{"$nulls":21},"0 deg",2.1907862171648422,6.688057526849242,17.30413919808573,null,-0.0018257,1.3014,1.2740144999999998,1.246629]
[null,"in","ft²","FPM","CFM","\"WG","ft","\"WG","ft","\"WG","ft",null,2,3,4,5,6,7,{"$nulls":8},"Pressure Constants from KEC",null,null,null," ",null,null,null,"15 deg",1.7692756480075045,5.766403120735049,15.661279849986391,null,-0.0014967,1.6512,1.6287495,1.606299]
[null,null,null,475,2632.4978298611113,0.029556875000000003,"50 - 75 - 126",0.03610000000000001,"42 - 64 - 114",0.04828375,"33 - 56 - 103"," - ",32.30949060633225,30.135352616761192,26.76017555258539,19.20380525845894,11.000822183582184," - ",{"$nulls":8},"Blade angle","m","b",null," "," ",null,null,"30 deg",1.4008479535092442,4.971758214897968,14.171130584432735,null,-0.004293,0.8253,0.760905,0.6965100000000001]
[null,null,null,578.125,3204.0269639756943,0.043783935546875,"61 - 91 - 139",0.0534765625,"52 - 78 - 125",0.07152490234374999,"45 - 68 - 113",16.1387505454874,37.523893269735396,35.22944260211821,32.349168752600235,25.731408003514414,18.63769075459481," - ",{"$nulls":8},0,0,2.1012432750000003]
[null,null,null,681.25,3775.556098090278,0.06079730468750001,"72 - 106 - 150",0.07425625000000001,"62 - 92 - 136",0.099317734375,"53 - 80 - 123",21.04242954370483,41.8801052712046,39.485143084653174,37.01832087330442,31.184692541436103,25.0176772401372,12.142657126600707,{"$nulls":8},15,0,2.5664040000000004]
[null,29,null,784.375,4347.085232204861,0.08059698242187502,"82 - 114 - 161",0.09843906250000002,"71 - 103 - 146",0.13166224609375,"61 - 92 - 132",25.253562649324696,45.621090066733444,43.139811588876256,41.02804929921081,35.86781047398327,30.49661913507799,17.667511942448808,{"$nulls":8},30,0,3.43256535]
[null,"x",5.840277777777778,887.5,4918.614366319444,0.10318296875,"93 - 121 - 172",0.126025,"80 - 110 - 155",0.1685584375,"69 - 99 - 141",28.9437759604798,48.899312707301675,46.34239531726644,44.54177181528377,39.97162379428224,35.297812496734934,22.5089387680303,{"$nulls":14},"KEC Constants"]
[null,29,null,990.625,5490.143500434028,0.128555263671875,"104 - 128 - 181",0.15701406250000002,"90 - 116 - 164",0.21000630859375,"77 - 105 - 148",32.22787399660319,51.81676046115399,49.19252837085804,47.668802217465526,43.62380434034182,39.57062503101383,26.817556993937213,{"$nulls":8},"Sound","titus const adgusted to agree with TEC octave bands!",{"$nulls":5},"2","3","4","5","6","7","NC"]
[null,null,null,1093.75,6061.672634548611,0.15671386718750002,"110 - 135 - 191",0.19140625000000003,"99 - 122 - 172",0.256005859375,"85 - 110 - 156",35.186448119499545,54.445027137272575,51.76015266416974,50.48587744714587,46.91397617347994,43.41991103187473,30.699099581397544,{"$nulls":10},"B","CVn","CAn",null,"M(An)",0.103,0.103,0.073,0.095,0.1095,0.167]
[null,null,null,1196.875,6633.201768663194,0.18765877929687502,"115 - 141 - 199",0.2292015625,"104 - 128 - 180",0.30655708984374996,"93 - 115 - 163",37.878251009945615,56.83630602424972,54.09625722238505,53.048940237147576,49.90747698928348,46.92211133271678,34.23064792945331,{"$nulls":8},"0 deg",null,-181,68.79,9.6,null,"M(Vn)",61.11,59.7,65.5,76.5,89.5,90.25]
[null,null,null,1300,7204.730902777778,0.22139000000000003,"120 - 147 - 208",0.27040000000000003,"109 - 133 - 188",0.36166000000000004,"98 - 120 - 170",40.34743756245771,59.02982238162747,56.23916225487483,55.400033698254475,52.653410573629685,50.13467415361856,37.470131667848705,{"$nulls":14},"B",-138.7,-137.1,-156,-193,-236,-251]
[]
[null,"1) Performance data does not include damper",{"$nulls":24}," ",{"$nulls":12},"Band","Slope 1","Slope 2","Const"]
[null,"2) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991.",{"$nulls":37},2,61.11,0.103,-138.7]
[null,"3) All pressures are in inches or water",{"$nulls":37},3,59.7,0.095,-137.1]
[null,"4) Throw values are given for terminal velocities of 150, 100, and 50 fpm, Isothermal Conditions",{"$nulls":34}," ",null,null,4,65.5,0.073,-156]
[null,"5) N.C. values are based on Octave Band 2 - 7 sound power levels minus a room absorption of 10dB.",{"$nulls":37},5,76.5,0.095,-193]
[null,"Sound data is based on 0 deg blade deflection. A setting of 15° and 30° increase sound by ",{"$nulls":24}," "," ",{"$nulls":11},6,89.5,0.1095,-236]
[null,"3 or 6 dB/NC respectively.  Dash (-) in space denotes an NC or dB value of less than 10.",{"$nulls":37},7,90.25,0.167,-251]
[null,"6) When selecting larger supply grilles for cooling purposes, account for drop by referring to the "]
[null,"Engineering Guidelines"]
[]
[null,"680/6880-30 H or V, 5680/56880-30 H or V Supply Grille"]
[null,null,null,"Metric Data"]
[null,"Nom","Duct ","Neck","Air","0°",null,"15°",null,"30°"]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB"]
[null,"mm","m²","m/s","L/s","Pa","m","Pa","m","Pa","m",null,2,3,4,5,6,7]
[null,null,null,2.4130000000000003,1242.4005063085938,7.3596618750000005,"15.2 - 22.7 - 38.2",8.988900000000001,"12.7 - 19.6 - 34.5",12.02265375,"10.1 - 16.9 - 31.3"," - ",32.30949060633225,30.135352616761192,26.76017555258539,19.20380525845894,11.000822183582184," - "]
[null,null,null,2.936875,1512.1321951782227,10.902199951171875,"18.4 - 27.7 - 42.1",13.3156640625,"15.9 - 23.9 - 38.1",17.809700683593746,"13.7 - 20.6 - 34.5",16.1387505454874,37.523893269735396,35.22944260211821,32.349168752600235,25.731408003514414,18.63769075459481," - "]
[null,null,null,3.46075,1781.8638840478516,15.138528867187503,"21.7 - 32.3 - 45.7",18.48980625,"18.7 - 28.1 - 41.4",24.730115859374997,"16.2 - 24.2 - 37.4",21.04242954370483,41.8801052712046,39.485143084653174,37.01832087330442,31.184692541436103,25.0176772401372,12.142657126600707]
[null,736.5999999999999,null,3.9846250000000003,2051.5955729174807,20.06864862304688,"25.0 - 34.7 - 49.0",24.511326562500006,"21.6 - 31.4 - 44.4",32.78389927734375,"18.6 - 27.9 - 40.2",25.253562649324696,45.621090066733444,43.139811588876256,41.02804929921081,35.86781047398327,30.49661913507799,17.667511942448808]
[null,"x",0.5425795600000001,4.508500000000001,2321.3272617871094,25.692559218750002,"28.3 - 36.9 - 52.2",31.380225,"24.4 - 33.4 - 47.2",41.971050937499996,"21.1 - 30.2 - 42.7",28.9437759604798,48.899312707301675,46.34239531726644,44.54177181528377,39.97162379428224,35.297812496734934,22.5089387680303]
[null,736.5999999999999,null,5.032375,2591.0589506567385,32.01026065429688,"31.6 - 39.0 - 55.1",39.09650156250001,"27.3 - 35.3 - 49.9",52.29157083984375,"23.5 - 31.9 - 45.1",32.22787399660319,51.81676046115399,49.19252837085804,47.668802217465526,43.62380434034182,39.57062503101383,26.817556993937213]
[null,null,null,5.55625,2860.790639526367,39.02175292968751,"33.4 - 41.0 - 57.9",47.66015625000001,"30.1 - 37.1 - 52.4",63.74545898437499,"25.9 - 33.5 - 47.4",35.186448119499545,54.445027137272575,51.76015266416974,50.48587744714587,46.91397617347994,43.41991103187473,30.699099581397544]
[null,null,null,6.080125000000001,3130.5223283959963,46.72703604492188,"35.0 - 42.8 - 60.6",57.071189062500004,"31.7 - 38.8 - 54.8",76.33271537109374,"28.4 - 35.1 - 49.6",37.878251009945615,56.83630602424972,54.09625722238505,53.048940237147576,49.90747698928348,46.92211133271678,34.23064792945331]
[null,null,null,6.604,3400.2540172656254,55.12611000000001,"36.5 - 44.7 - 63.1",67.32960000000001,"33.0 - 40.4 - 57.2",90.05334,"29.9 - 36.6 - 51.7",40.34743756245771,59.02982238162747,56.23916225487483,55.400033698254475,52.653410573629685,50.13467415361856,37.470131667848705]
[]
[null,"1) Performance data does not include damper"]
[null,"2) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[null,"3) All pressures are in inches or water"]
[null,"4) Throw values are given for terminal velocities of  0.75,0.5 and 0.25 m/s, Isothermal Conditions"]
[null,"5) N.C. values are based on Octave Band 2 - 7 sound power levels minus a room absorption of 10dB."]
[null,"Sound data is based on 0 deg blade deflection. A setting of 15° and 30° increase sound by "]
[null,"3 or 6 dB/NC respectively.  Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"6) When selecting larger supply grilles for cooling purposes, account for drop by referring to the "]
[null,"Engineering Guidelines"]