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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",{"$nulls":11},2.375,2.1861979166666665,0.75]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":6},1537,"CFM"]
[null,"Enter Maximum Air Flow =",{"$nulls":6},2441,"CFM",{"$nulls":16},"Throw Zones"]
[{"$nulls":26},"Blade angle","c(ii)","c(iii)","c(iv)"]
[{"$nulls":26},0,2.1907862171648422,6.688057526849242,17.30413919808573]
[null,"680/6880-15 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,{"$nulls":8},"Pressure Constants from KEC",null,null,null," ",null,null,null,"15 deg",1.7692756480075045,5.766403120735049,15.661279849986391,null,-0.0014967,1.6512,1.6287495,1.606299]
[null,null,null,703.0470518165575,1537,0.07216417293192118,"46 - 68 - 96",0.09242945437170727,"40 - 60 - 87",0.13296001725127943,"34 - 52 - 79",20.105075254561594,40.67611091910436,38.26186292723992,35.87437239732051,30.19120070264583,24.20199779075753,11.337236084302447,{"$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,754.7349612864801,1650,0.08316522982106328,"50 - 70 - 99",0.10651984915437557,"43 - 64 - 90",0.15322908782100014,"37 - 55 - 81",22.224500431728725,42.55891470710674,40.10122450707533,37.89243242209807,32.54817157127914,26.95949965667495,14.117845507755476,{"$nulls":8},0,0,2.34184365]
[null,null,null,806.4228707564026,1763,0.09494640558593366,"53 - 73 - 103",0.12160943729157259,"46 - 66 - 93",0.17493550070285038,"40 - 59 - 84",24.203476472324464,44.31694968080649,41.818696081774675,39.776760531692815,34.748951729813456,29.53426860031965,16.714190727464256,{"$nulls":8},15,0,2.999484675]
[null,19,null,858.1107802263252,1876,0.10750770022653236,"57 - 75 - 106",0.13769821878329833,"49 - 68 - 96",0.1980792558968302,"42 - 61 - 87",26.05946656307523,45.96572936456545,43.429433229874974,41.54398470590672,36.812961643208325,31.949025296382956,19.149182814835342,{"$nulls":8},30,0,4.314766725]
[null,"x",2.375,909.7986896962478,1989,0.1208491137428594,"60 - 77 - 109",0.1547861936295528,"52 - 70 - 99",0.22266035340293958,"45 - 63 - 89",27.80686664038404,47.51804247292918,44.945929590033955,43.20781237073777,38.75621074793463,34.22249973916735,21.44170871943078,{"$nulls":14},"KEC Constants"]
[null,18,null,961.4865991661704,2102,0.1349706461349147,"63 - 79 - 112",0.17287336183033594,"55 - 72 - 102",0.24867879322117845,"47 - 65 - 92",29.45768414656217,48.98455588770668,46.37860592553088,44.77967669192785,40.59205228337041,36.3703143459843,23.60752177267358,{"$nulls":8},"Sound","titus const adgusted to agree with TEC octave bands!",{"$nulls":5},"2","3","4","5","6","7","NC"]
[null,null,null,1013.174508636093,2215,0.14987229740269833,"66 - 81 - 115",0.19195972338564787,"58 - 74 - 104",0.27613457535154695,"50 - 67 - 94",31.022038834413788,50.37425955066081,47.73624475188271,46.269213427707484,42.331740226685554,38.40563553456872,25.65989872540814,{"$nulls":10},"B","CVn","CAn",null,"M(An)",0.103,0.103,0.073,0.095,0.1095,0.167]
[null,null,null,1064.8624181060156,2328,0.16555406754621027,"68 - 83 - 118",0.21204527829548853,"61 - 76 - 107",0.305027699794045,"52 - 68 - 97",32.50853882677048,51.694800538201406,49.02631670338286,47.68461900263645,43.98484750122091,40.33966299954801,27.610133124451465,{"$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,1116.5503275759381,2441,0.18201595656545047,"70 - 85 - 121",0.23313002655985782,"63 - 77 - 109",0.33535816654867245,"55 - 70 - 99",33.92456745536253,52.95273787637933,50.25522946871132,49.03292362791308,45.55958496433024,42.18200290736871,29.467911634851703,{"$nulls":14},"B",-136.7,-135.1,-154,-191,-234,-249]
[]
[null,"1) Performance data does not include damper",{"$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,3.5714790232281124,725.3831538000001,17.968879060048373,"14.1 - 20.6 - 29.2",23.01493413855511,"12.1 - 18.2 - 26.4",33.10704429556858,"10.5 - 15.7 - 23.9",20.105075254561594,40.67611091910436,38.26186292723992,35.87437239732051,30.19120070264583,24.20199779075753,11.337236084302447]
[null,null,null,3.8340536033353194,778.71321,20.708142225444757,"15.1 - 21.4 - 30.2",26.523442439439517,"13.0 - 19.3 - 27.4",38.154042867429034,"11.2 - 16.9 - 24.7",22.224500431728725,42.55891470710674,40.10122450707533,37.89243242209807,32.54817157127914,26.95949965667495,14.117845507755476]
[null,null,null,4.096628183442526,832.0432662000001,23.641654990897482,"16.2 - 22.1 - 31.2",30.280749885601573,"13.9 - 20.0 - 28.3",43.558939675009746,"12.0 - 18.0 - 25.6",24.203476472324464,44.31694968080649,41.818696081774675,39.776760531692815,34.748951729813456,29.53426860031965,16.714190727464256]
[null,482.59999999999997,null,4.359202763549733,885.3733224,26.769417356406557,"17.2 - 22.8 - 32.2",34.28685647704128,"14.8 - 20.6 - 29.2",49.32173471831072,"12.8 - 18.7 - 26.4",26.05946656307523,45.96572936456545,43.429433229874974,41.54398470590672,36.812961643208325,31.949025296382956,19.149182814835342]
[null,"x",0.22064472000000002,4.621777343656939,938.7033786000001,30.09142932197199,"18.2 - 23.5 - 33.2",38.541762213758645,"15.7 - 21.2 - 30.0",55.442427997331954,"13.6 - 19.2 - 27.2",27.80686664038404,47.51804247292918,44.945929590033955,43.20781237073777,38.75621074793463,34.22249973916735,21.44170871943078]
[null,457.2,null,4.884351923764146,992.0334348,33.607690887593755,"19.3 - 24.1 - 34.1",43.04546709575365,"16.6 - 21.8 - 30.9",61.921019512073435,"14.3 - 19.8 - 27.9",29.45768414656217,48.98455588770668,46.37860592553088,44.77967669192785,40.59205228337041,36.3703143459843,23.60752177267358]
[null,null,null,5.146926503871353,1045.363491,37.31820205327188,"20.2 - 24.8 - 35.0",47.79797112302632,"17.5 - 22.4 - 31.7",68.7575092625352,"15.1 - 20.3 - 28.7",31.022038834413788,50.37425955066081,47.73624475188271,46.269213427707484,42.331740226685554,38.40563553456872,25.65989872540814]
[null,null,null,5.40950108397856,1098.6935472,41.222962819006355,"20.7 - 25.4 - 35.9",52.799274295576645,"18.4 - 23.0 - 32.5",75.9518972487172,"15.9 - 20.8 - 29.4",32.50853882677048,51.694800538201406,49.02631670338286,47.68461900263645,43.98484750122091,40.33966299954801,27.610133124451465]
[null,null,null,5.672075664085766,1152.0236034,45.321973184797166,"21.2 - 26.0 - 36.8",58.0493766134046,"19.2 - 23.5 - 33.3",83.50418347061944,"16.6 - 21.3 - 30.1",33.92456745536253,52.95273787637933,50.25522946871132,49.03292362791308,45.55958496433024,42.18200290736871,29.467911634851703]
[]
[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"]