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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 Neck Velocity (greater than 0)=",{"$nulls":6},150,"FPM",{"$nulls":22}," "]
[null,"Enter Maximum Neck Velocity =",{"$nulls":6},640,"FPM"]
[{"$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}," "]
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[null,"Duct","Area","Vel","Flow","Ps","Nc","Duct","Area","Vel","Flow","Ps","Octave Band, dB",{"$nulls":20},"2","3","4","5","6","7","NC"]
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[null,null,null,211.25,543.6203342013889,-0.01727705805694071,15.047670239375027,null,null,1.07315,256.56020331347656,-4.301987456178237,33.4978978914343,36.18251374038699,34.50333286782699," - "," - "," - ",{"$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,272.5,701.2380642361112,-0.02874811481033753,21.28080285355792,null,null,1.3843,330.9474811972657,-7.158280587774045,37.26021993427215,40.69964714451681,39.60506815978197,19.238124092549143,12.460115029753027,10.98882843084745]
[null,20,null,333.75,858.8557942708334,-0.043123986968987296,26.244699861663737,508,null,1.6954500000000001,405.3347590810547,-10.737872755277836,40.25643071430246,44.29696912976613,43.667951162505126,26.78543503772572,20.706363222004896,18.232153537012678,{"$nulls":9}," "]
[null,"x",2.7777777777777777,395,1016.4735243055557,-0.06040467453289001,30.36982845410653,"x",0.258064,2.0066,479.7220369648438,-15.040763958689611,42.746360448441884,47.28643803964541,47.04431348729049,33.057448362169154,27.559211728468696,24.25154665717794,{"$nulls":8}," ","Band","Const","Slope 1","Slope 2"]
[null,20,null,456.25,1174.0912543402778,-0.08059017750204565,33.89909394491169,508,null,2.31775,554.1093148486328,-20.066954198009366,44.87662690882005,49.84408666150912,49.93296986982114,38.42348718684495,33.42218574384508,29.401455548141527,{"$nulls":9},2,-49.289634470495336,34.02667290200247,8.97063112627595]
[null,null,null,517.5,1331.708984375,-0.10368049587645427,36.98310957113886,null,null,2.6289000000000002,628.4965927324218,-25.81644347323711,46.738140322574345,52.07906397811403,52.45719522088506,43.11255000440768,38.5454907280387,33.90165524543163,{"$nulls":9},3,-62.56114509490833,40.853233467781244,9.179549741171828]
[null,null,null,578.75,1489.3267144097224,-0.1296756296561158,39.72173859498883,null,null,2.9400500000000003,702.8838706162111,-32.28923178437283,48.391178205988105,54.06374061037493,54.69872627876054,47.276472981199746,43.09502400809943,37.89786635386777,{"$nulls":9},4,-76.5303399776648,46.140409044042066,9.17566565112711,{"$nulls":5}," ",null,null," "]
[null,null,null,640,1646.9444444444446,-0.15857557884103027,42.184609746410125,null,null,3.2512000000000003,777.2711485000001,-39.48531913141654,49.87776849617021,55.84857630003098,56.71455322332988,51.02112247076978,47.18645595098481,41.491691208656064,{"$nulls":9},5,-194.2779246060708,85.71155358390013,11.637061612013042]
[{"$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."]