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[{"$nulls":28},"680/6880-15 H or V, 5680,56880-15 H or V Supply Grille"]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},19,"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},18,"Inches",{"$nulls":11},2.375,2.1861979166666665,0.75]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":6},500,"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,"680/6880-15 H or V, 5680/56880-15 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,{"$nulls":8},"Pressure Constants from KEC",null,null,null," ",null,null,null,"15 deg",1.7692756480075045,5.766403120735049,15.661279849986391,null,-0.0014967,1.6512,1.6287495,1.606299]
[null,null,null,500,1093.0989583333333,0.0365,"33 - 49 - 81",0.04675,"28 - 43 - 73",0.06725,"23 - 37 - 66"," - ",31.630951726039484,29.425404019925708,26.179430045074582,18.868100092770817,10.954710149139032," - ",{"$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,600,1311.71875,0.05256,"40 - 59 - 89",0.06732,"34 - 51 - 80",0.09684000000000001,"29 - 44 - 73",15.370043484513612,36.469717672009835,34.1525244089689,31.365801661194013,24.925465415414095,18.041431670401465," - ",{"$nulls":8},0,0,2.34184365]
[null,null,null,700,1530.3385416666665,0.07154,"46 - 68 - 96",0.09163000000000002,"40 - 60 - 87",0.13181000000000004,"34 - 51 - 78",19.97531314320352,40.56083598633663,38.149247749916526,35.750816381999186,30.04689482215602,24.033169342341353,11.166992872352068,{"$nulls":8},15,0,2.999484675]
[null,19,null,800,1748.9583333333333,0.09343999999999998,"53 - 72 - 102",0.11968,"45 - 65 - 93",0.17215999999999998,"39 - 59 - 84",23.964579175798573,44.104723866143075,41.61136698448442,39.54928890903767,34.48327876594908,29.22344859684432,16.4007660870883,{"$nulls":8},30,0,4.314766725]
[null,"x",2.375,900,1967.5781249999998,0.11825999999999999,"59 - 77 - 109",0.15147,"51 - 69 - 98",0.21789,"44 - 63 - 89",27.48336119495391,47.230654512902504,44.66517257459307,42.89977912934114,38.39644673317372,33.801599355884946,21.017281237964426,{"$nulls":14},"KEC Constants"]
[null,18,null,1000,2186.1979166666665,0.146,"66 - 81 - 114",0.187,"57 - 73 - 104",0.269,"49 - 66 - 94",30.63101897062276,50.026894761065364,47.3968947610654,45.89689476106537,41.89689476106537,37.89689476106537,25.14689476106537,{"$nulls":8},"Sound","titus const adgusted to agree with TEC octave bands!",{"$nulls":5},"2","3","4","5","6","7","NC"]
[null,null,null,1100,2404.817708333333,0.17666,"69 - 85 - 120",0.22627000000000003,"63 - 77 - 109",0.32549000000000006,"54 - 69 - 98",33.47842178265707,52.55640175108451,49.868038065011405,48.60811563892909,45.06343517566958,41.6015400827265,28.882584596595166,{"$nulls":10},"B","CVn","CAn",null,"M(An)",0.103,0.103,0.073,0.095,0.1095,0.167]
[null,null,null,1200,2623.4375,0.21024,"72 - 89 - 125",0.26928,"65 - 80 - 113",0.38736000000000004,"59 - 73 - 103",36.07789688623887,54.865660707035715,52.12401515010856,51.08326637718477,47.95426008370865,44.98361628232777,32.2930022168635,{"$nulls":8},"0 deg",null,-179,68.79,9.6,null,"M(Vn)",61.11,59.7,65.5,76.5,89.5,90.25]
[null,null,null,1300,2842.0572916666665,0.24674000000000001,"75 - 92 - 130",0.31603000000000003,"68 - 83 - 118",0.45461,"62 - 76 - 107",38.46918217581008,56.98997302053618,54.19931289378354,53.36018433716319,50.6135612125384,48.09482479252728,35.43028230675742,{"$nulls":14},"B",-136.7,-135.1,-154,-191,-234,-249]
[]
[null,"1) Performance data does not include damper",{"$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,-136.7]
[null,"3) All pressures are in inches or water",{"$nulls":37},3,59.7,0.095,-135.1]
[null,"4) Throw values are given for terminal velocities of 150, 100, and 50 fpm, Isothermal Conditions",{"$nulls":34}," ",null,null,4,65.5,0.073,-154]
[null,"5) N.C. values are based on Octave Band 2 - 7 sound power levels minus a room absorption of 10dB.",{"$nulls":37},5,76.5,0.095,-191]
[null,"Sound data is based on 0 deg blade deflection. A setting of 15° and 30° increase sound by ",{"$nulls":24}," "," ",{"$nulls":11},6,89.5,0.1095,-234]
[null,"3 or 6 dB/NC respectively.  Dash (-) in space denotes an NC or dB value of less than 10.",{"$nulls":37},7,90.25,0.167,-249]
[null,"6) When selecting larger supply grilles for cooling purposes, account for drop by referring to the "]
[null,"Engineering Guidelines"]
[]
[null,"680/6880-15 H or V, 5680/56880-15 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,2.54,515.885211328125,9.0885,"10.0 - 15.0 - 24.6",11.64075,"8.6 - 13.0 - 22.3",16.745250000000002,"7.0 - 11.2 - 20.1"," - ",31.630951726039484,29.425404019925708,26.179430045074582,18.868100092770817,10.954710149139032," - "]
[null,null,null,3.048,619.06225359375,13.08744,"12.0 - 18.0 - 26.9",16.76268,"10.4 - 15.6 - 24.4",24.11316,"8.9 - 13.4 - 22.1",15.370043484513612,36.469717672009835,34.1525244089689,31.365801661194013,24.925465415414095,18.041431670401465," - "]
[null,null,null,3.556,722.2392958593749,17.813460000000003,"14.0 - 20.6 - 29.1",22.815870000000004,"12.1 - 18.1 - 26.3",32.820690000000006,"10.4 - 15.6 - 23.8",19.97531314320352,40.56083598633663,38.149247749916526,35.750816381999186,30.04689482215602,24.033169342341353,11.166992872352068]
[null,482.59999999999997,null,4.064,825.416338125,23.266559999999995,"16.0 - 22.0 - 31.1",29.80032,"13.8 - 19.9 - 28.2",42.867839999999994,"11.9 - 17.9 - 25.5",23.964579175798573,44.104723866143075,41.61136698448442,39.54928890903767,34.48327876594908,29.22344859684432,16.4007660870883]
[null,"x",0.22064472000000002,4.572,928.5933803906249,29.44674,"18.0 - 23.3 - 33.0",37.716029999999996,"15.6 - 21.1 - 29.9",54.25461,"13.4 - 19.1 - 27.0",27.48336119495391,47.230654512902504,44.66517257459307,42.89977912934114,38.39644673317372,33.801599355884946,21.017281237964426]
[null,457.2,null,5.08,1031.77042265625,36.354,"20.0 - 24.6 - 34.8",46.563,"17.3 - 22.3 - 31.5",66.98100000000001,"14.9 - 20.1 - 28.5",30.63101897062276,50.026894761065364,47.3968947610654,45.89689476106537,41.89689476106537,37.89689476106537,25.14689476106537]
[null,null,null,5.588,1134.9474649218748,43.98834,"21.1 - 25.8 - 36.5",56.34123000000001,"19.0 - 23.3 - 33.0",81.04701000000001,"16.4 - 21.1 - 29.9",33.47842178265707,52.55640175108451,49.868038065011405,48.60811563892909,45.06343517566958,41.6015400827265,28.882584596595166]
[null,null,null,6.096,1238.1245071875,52.34976,"22.0 - 26.9 - 38.1",67.05072,"19.9 - 24.4 - 34.5",96.45264,"17.9 - 22.1 - 31.2",36.07789688623887,54.865660707035715,52.12401515010856,51.08326637718477,47.95426008370865,44.98361628232777,32.2930022168635]
[null,null,null,6.604,1341.301549453125,61.43826000000001,"22.9 - 28.0 - 39.7",78.69147000000001,"20.7 - 25.4 - 35.9",113.19789,"18.8 - 23.0 - 32.5",38.46918217581008,56.98997302053618,54.19931289378354,53.36018433716319,50.6135612125384,48.09482479252728,35.43028230675742]
[]
[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"]