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[{"$nulls":28},"S80P / S580P Perforated Face Return "]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},15,"Inches",{"$nulls":11},"Area ( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",1,null,null," - ",null,"Based on 6790 perforated constants"]
[null,"Enter Duct Height in inches =",{"$nulls":6},19,"Inches",{"$nulls":11},1.9791666666666667,1.8059895833333333,0.75]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":6},400,"CFM"]
[null,"Enter Maximum Air Flow =",{"$nulls":6},2500,"CFM"]
[{"$nulls":26},"Pressure Constants",null,null,null," "]
[{"$nulls":27},"m","b",null," "," "]
[null,"S80P / S580P Perforated Face Return ",{"$nulls":24},"0 Degrees",0,5.1]
[null,"IP Data",{"$nulls":5},"Metric Data"]
[null,"Nom","Duct ","Neck","Air"," ",null,"Nom","Duct ","Neck","Air"," ",{"$nulls":19}," ","From S80P Sound Analysis"]
[null,"Duct","Area","Vel","Flow","Ps","Nc","Duct","Area","Vel","Flow","Ps","Octave Band, dB",{"$nulls":20},"2","3","4","5","6","7"]
[null,"in","ft²","FPM","CFM","\"WG",null,"mm","m²","m/s","L/s","Pa",2,3,4,5,6,7,{"$nulls":8},"Sound",{"$nulls":5},"M(An)",10.466413341303731,10.5053081238503,10.632707681221367,10.696833251107343,10.795903641665245,10.89546673675829]
[null,null,null,221.48521989906274,400,-0.01253915631667147," - ",null,null,1.1251449170872387,188.77896,-3.122249922851196,42.569237274172615,34.236436799371305,25.366903656961455,20.7423960168832,17.88288877918985,12.341998486796648,{"$nulls":10},"B","CVn","CAn",null,"M(Vn)",10.645447428233576,13.793513723076307,24.10498035894091,29.295176369267452,37.313736621122814,45.372175397521,"Adjust"]
[null,null,null,366.83489545782265,662.5,-0.03439696298196305,18.123153669804715,null,null,1.8635212689257392,312.66515250000003,-8.564843782508799,44.90193042996808,37.25895278783549,30.648928962422573,27.161727649029608,26.059294573313533,22.284216860131004,{"$nulls":8},"0 deg",null,-75.94438574956783,35.680029057786996,10,null,"B",14.91510521016177,-0.8109809062785547,-33.89716359894377,-50.71093221592792,-72.40216052435592,-96.86842726043295,3]
[null,null,null,512.1845710165826,925,-0.06705509764657518,23.295182614546015,null,null,2.6018976207642397,436.551345,-16.696719313997217,46.445050311943895,39.25840329584642,34.14308688272431,31.408234844350538,31.46813898676228,28.86117911713462,{"$nulls":13}," "]
[null,15,null,657.5342465753425,1187.5,-0.11051356031050782,27.166176243784953,381,null,3.3402739726027404,560.4375375000001,-27.51787651731645,47.59999497604015,40.75488760813134,36.75828165320127,34.586523766402756,35.51637662999769,33.783691977874135]
[null,"x",1.9791666666666667,802.8839221341024,1450,-0.16477235097376103,30.260861583004576,"x",0.18387060000000002,4.078650324441241,684.3237300000001,-41.028315392466496,48.52332130047311,41.95125952324369,38.8490122744733,37.127422841148295,38.75276058825819,37.7190196589082,{"$nulls":8}," ",{"$nulls":4},"Titus Data"]
[null,19,null,948.2335976928623,1712.5,-0.2298314696363348,32.839192463319314,482.59999999999997,null,4.817026676279741,808.2099225000001,-57.228035939447366,49.2925887748501,42.94801438357896,40.59090029615006,39.244367806490594,41.4491473886825,40.99773001940199,{"$nulls":13},"Band","Const","Slope 1","Slope 2","NC"]
[null,null,null,1093.5832732516224,1975,-0.3056909162982292,35.04908928945073,null,null,5.555403028118242,932.096115,-76.11703815825906,49.95193074024763,43.80233661937248,42.08387888938238,41.0588090776721,43.76023037565462,43.80792465918959,{"$nulls":13},2,14.91510521016177,10.645447428233576,10.466413341303731,10]
[null,null,null,1238.9329488103822,2237.5,-0.3923506909594439,36.9828021470937,null,null,6.293779379956742,1055.9823075,-97.69532204890153,50.52887081319427,44.54988911702288,43.39027105565061,42.64648881639719,45.782483556954126,46.26691253734746,{"$nulls":13},3,-0.8109809062785547,13.793513723076307,10.5053081238503,35.680029057786996," ",null,null," "]
[null,null,null,1384.282624369142,2500,-0.4898107936199793,38.701757646937956,null,null,7.032155731795242,1179.8685,-121.96288761137485,51.0417361579906,45.21441874052901,44.551575843113945,44.057841493753536,47.58014612838134,48.452806229114096,{"$nulls":13},4,-33.89716359894377,24.10498035894091,10.632707681221367,-78.94438574956783]
[{"$nulls":26}," "," ",null,null,null,5,-50.71093221592792,29.295176369267452,10.696833251107343]
[null,"1) Performance data does not include damper",{"$nulls":29},6,-72.40216052435592,37.313736621122814,10.795903641665245,{"$nulls":4}," "]
[null,"2) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991.",{"$nulls":29},7,-96.86842726043295,45.372175397521,10.89546673675829]
[null,"3) All pressures are in inches of water (Pascals)"]
[null,"4) N.C. values are based on Octave Band 2 - 7 sound power levels minus a room absorption of 10dB."]