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[{"$nulls":28},"AFS580 (H,V)  Aluminum Return"]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},20,"Inches",{"$nulls":11},"Area ( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",1,null,null," - ",null," "]
[null,"Enter Duct Height in inches =",{"$nulls":6},20,"Inches",{"$nulls":11},2.7777777777777777,2.5733506944444446,0.75,{"$nulls":8},"\"",null,"Based on:","Titus Models 3F Return Aluminum"]
[null,"Enter Minimum Air Flow (must be greater than 0)=",{"$nulls":6},800,"CFM",{"$nulls":22}," "]
[null,"Enter Maximum Air Flow =",{"$nulls":6},1475,"CFM"]
[{"$nulls":26},"Pressure Constants",null,null,null," "]
[{"$nulls":27},"m","b",null," "," "]
[null,"AFS580 Return Grille / 45° deflection",{"$nulls":24}," ",0,7.209854123534171]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":24}," "]
[null,"Nom","Duct ","Neck","Air"," ",null,"Nom","Duct ","Neck","Air"," ",{"$nulls":19}," ","from : ","AFS580 Sound Regression"]
[null,"Duct","Area","Vel","Flow","Ps","Nc","Duct","Area","Vel","Flow","Ps","Octave Band, dB",{"$nulls":20},"2","3","4","5","6","7","NC"]
[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)",8.97063112627595,9.179549741171828,9.17566565112711,11.637061612013042,12.105120774308723,10.6024290162107,10.566416671474377]
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[null,null,null,343.6667228875021,884.375,-0.045724747995385964,26.961548530608543,null,null,1.7458269522685108,417.37848187500003,-11.385462250851106,40.68912093854271,44.81646731288334,44.254682165953575,27.875360915786402,21.897224360088856,19.278180066694958,{"$nulls":8}," ",null,-120.34521776632485,56.37283629703001,10.566416671474377,null,"B",-49.289634470495336,-62.56114509490833,-76.5303399776648,-194.2779246060708,-220.57886303912957,-193.6950447258766,-120.34521776632485]
[null,null,null,376.45471411705176,968.75,-0.054865815309925084,29.192518088729873,null,null,1.9123899477146231,457.19904375000004,-13.661588012171347,42.035735308068745,46.4332445801688,46.08070077239979,31.26741778901915,25.60341098233046,22.533613808580114]
[null,20,null,409.24270534660144,1053.125,-0.06483929010335986,31.237059786817174,508,null,2.0789529431607354,497.019605625,-16.144983235736603,43.26982172566108,47.914918109711884,47.754130680384016,34.37602215986861,28.999895287767245,25.51701176953189,{"$nulls":9}," "]
[null,"x",2.7777777777777777,442.0306965761511,1137.5,-0.07564517237569027,33.12394220606429,"x",0.258064,2.245515938606848,536.8401675,-18.835647921546876,44.408744921683486,49.28233641014278,49.2985185870585,37.244914949503524,32.13446893288925,28.270353101432292,{"$nulls":8}," ","Band","Const","Slope 1","Slope 2"]
[null,20,null,474.81868780570073,1221.875,-0.0872834621269163,34.875749163162304,508,null,2.41207893405296,576.6607293750001,-21.73358206960216,45.466136499473684,50.551865908919815,50.73234904293283,39.90843351154304,35.044649166192684,30.826592139587703,{"$nulls":9},2,-49.289634470495336,34.02667290200247,8.97063112627595]
[null,null,null,507.6066790352504,1306.25,-0.099754159357038,36.51053460368089,null,null,2.578641929499072,616.48129125,-24.838785679902465,46.4528938298373,51.736590248836585,52.070398959870325,42.39402779927572,37.76042801123769,33.21207322534862,{"$nulls":9},3,-62.56114509490833,40.853233467781244,9.179549741171828]
[null,null,null,540.3946702648001,1390.625,-0.11305726406605532,38.042958520147685,null,null,2.7452049249451846,656.301853125,-28.151258752447774,47.37786569178295,52.84713348461002,53.32466734477287,44.72398746171716,40.30615930467361,35.4481882392795,{"$nulls":9},4,-76.5303399776648,46.140409044042066,9.17566565112711,{"$nulls":5}," ",null,null," "]
[null,null,null,573.1826614943498,1475,-0.12719277625396827,39.48508772227168,null,null,2.911767920391297,696.122415,-31.6710012872381,48.24833561783995,53.8922403987743,54.50503071924913,46.91665936723332,42.70188897162468,37.552545086132156,{"$nulls":9},5,-194.2779246060708,85.71155358390013,11.637061612013042]
[{"$nulls":26}," ",6,-220.57886303912957,93.64908229308406,12.105120774308723]
[null,"1) Performance data does not include damper",{"$nulls":25},7,-193.6950447258766,82.25931758641285,10.6024290162107,{"$nulls":8}," "]
[null,"2) Data were obtained from test conducted in accordance with ANSI / ASHRAE Standard 70-1991."]
[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."]