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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},25,"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},25,"Inches",{"$nulls":11},4.340277777777778,4.083767361111111,0.75]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":6},2000,"CFM"]
[null,"Enter Maximum Air Flow =",{"$nulls":6},5400,"CFM",{"$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,{"$nulls":8},"Pressure Constants from KEC",null,null,null," ",null,null,null,"15 deg",1.7692756480075045,5.766403120735049,15.661279849986391,null,-0.0014967,1.6512,1.6287495,1.606299]
[null,null,null,489.7438622595388,2000,0.03142022563133661,"44 - 66 - 109",0.03837584809934243,"38 - 57 - 99",0.05132769683287049,"30 - 49 - 90"," - ",31.794615642862894,29.601759350208326,26.30357956112779,18.89323858183711,10.862835606311776," - ",{"$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,593.8144329896908,2425,0.04619264108831971,"54 - 80 - 121",0.05641849293229888,"46 - 69 - 109",0.07545973429694974,"40 - 60 - 99",15.665620574808406,36.90840721879543,34.5975596624841,31.78473400759451,25.29489224832112,18.3523519873617," - ",{"$nulls":8},0,0,2.1012432750000003]
[null,null,null,697.8850037198428,2850,0.0638026956726329,"63 - 92 - 131",0.0779269565467272,"54 - 81 - 118",0.10422730438124762,"47 - 70 - 107",20.490077698069378,41.19424200295704,38.7845067515767,36.37845317569442,30.660075704193574,24.6292659651471,11.762103864817519,{"$nulls":8},15,0,2.5664040000000004]
[null,25,null,801.9555744499947,3275,0.08425038938427618,"72 - 99 - 140",0.10290123894262738,"62 - 90 - 127",0.13763040708576413,"54 - 81 - 115",24.642685402793468,44.88323541530896,42.38838347743844,40.33245527860804,35.27810869461938,30.03206273172374,17.210175464633565,{"$nulls":8},30,0,3.43256535]
[null,"x",4.340277777777778,906.0261451801467,3700,0.10753572222324953,"82 - 105 - 149",0.13134134011999943,"70 - 95 - 135",0.17566904241049922,"61 - 86 - 122",28.28789637665256,48.121479965571055,45.55191153586826,43.80332777152519,39.33187580466766,34.774705298381505,21.992560846095742,{"$nulls":14},"KEC Constants"]
[null,25,null,1010.0967159102987,4125,0.13365869418955298,"91 - 111 - 157",0.16324726007884333,"78 - 101 - 142",0.21834321035545293,"68 - 91 - 129",31.536313497108047,51.00723036869702,48.37107859635948,46.89638375916631,42.944376309317235,39.00109477767741,26.254366997005903,{"$nulls":8},"Sound","titus const adgusted to agree with TEC octave bands!",{"$nulls":5},"2","3","4","5","6","7","NC"]
[null,null,null,1114.1672866404508,4550,0.16261930528318652,"95 - 117 - 165",0.1986189988191591,"86 - 106 - 149",0.26565291092062526,"75 - 96 - 135",34.46590375412672,53.60974905755312,50.91354898949824,49.68586132617786,46.20231575781163,42.812670995196996,30.097883797353816,{"$nulls":10},"B","CVn","CAn",null,"M(An)",0.103,0.103,0.073,0.095,0.1095,0.167]
[null,null,null,1218.2378573706028,4975,0.19441755550415016,"100 - 122 - 173",0.23745655634094676,"90 - 110 - 156",0.3175981441060162,"82 - 100 - 141",37.13369610085716,55.97969803718239,53.228815788448784,52.22606191799126,49.169114922295975,46.28363210920158,33.59793117767687,{"$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,1322.3084281007548,5400,0.22905344485244386,"104 - 127 - 180",0.27975993264420623,"94 - 115 - 163",0.3741789099116258,"85 - 104 - 147",39.582666516305984,58.15525527061861,55.35417607049989,54.55790611354145,51.892566539999635,49.46989249854114,36.81089207307237,{"$nulls":14},"B",-138.7,-137.1,-156,-193,-236,-251]
[]
[null,"1) Performance data does not include damper",{"$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,2.487898820278457,943.8948,7.823636182202816,"13.4 - 20.1 - 33.3",9.555586176736265,"11.6 - 17.3 - 30.1",12.78059651138475,"9.2 - 15.0 - 27.2"," - ",31.794615642862894,29.601759350208326,26.30357956112779,18.89323858183711,10.862835606311776," - "]
[null,null,null,3.016577319587629,1144.472445,11.501967630991608,"16.3 - 24.4 - 36.6",14.04820474014242,"14.0 - 21.0 - 33.2",18.789473839940484,"12.1 - 18.1 - 30.0",15.665620574808406,36.90840721879543,34.5975596624841,31.78473400759451,25.29489224832112,18.3523519873617," - "]
[null,null,null,3.5452558188968015,1345.05009,15.886871222485592,"19.1 - 28.1 - 39.7",19.403812180135073,"16.5 - 24.7 - 35.9",25.952598790930658,"14.2 - 21.3 - 32.5",20.490077698069378,41.19424200295704,38.7845067515767,36.37845317569442,30.660075704193574,24.6292659651471,11.762103864817519]
[null,635,null,4.073934318205974,1545.627735,20.978346956684767,"22.0 - 30.1 - 42.6",25.62240849671422,"18.9 - 27.2 - 38.5",34.26997136435527,"16.3 - 24.5 - 34.9",24.642685402793468,44.88323541530896,42.38838347743844,40.33245527860804,35.27810869461938,30.03206273172374,17.210175464633565]
[null,"x",0.403225,4.602612817515146,1746.20538,26.776394833589134,"24.8 - 32.0 - 45.3",32.70399368987986,"21.4 - 29.0 - 41.0",43.7415915602143,"18.4 - 26.2 - 37.1",28.28789637665256,48.121479965571055,45.55191153586826,43.80332777152519,39.33187580466766,34.774705298381505,21.992560846095742]
[null,635,null,5.131291316824318,1946.7830250000002,33.28101485319869,"27.6 - 33.8 - 47.8",40.64856775963199,"23.9 - 30.6 - 43.2",54.36745937850778,"20.6 - 27.7 - 39.1",31.536313497108047,51.00723036869702,48.37107859635948,46.89638375916631,42.944376309317235,39.00109477767741,26.254366997005903]
[null,null,null,5.659969816133491,2147.36067,40.49220701551344,"29.0 - 35.5 - 50.2",49.456130705970615,"26.2 - 32.1 - 45.4",66.14757481923569,"22.7 - 29.1 - 41.1",34.46590375412672,53.60974905755312,50.91354898949824,49.68586132617786,46.20231575781163,42.812670995196996,30.097883797353816]
[null,null,null,6.188648315442663,2347.938315,48.40997132053339,"30.3 - 37.1 - 52.5",59.12668252889574,"27.4 - 33.6 - 47.5",79.08193788239804,"24.8 - 30.4 - 43.0",37.13369610085716,55.97969803718239,53.228815788448784,52.22606191799126,49.169114922295975,46.28363210920158,33.59793117767687]
[null,null,null,6.717326814751835,2548.51596,57.03430776825852,"31.6 - 38.7 - 54.7",69.66022322840735,"28.6 - 35.0 - 49.5",93.17054856799481,"25.8 - 31.7 - 44.8",39.582666516305984,58.15525527061861,55.35417607049989,54.55790611354145,51.892566539999635,49.46989249854114,36.81089207307237]
[]
[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"]