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[{"$nulls":28},"S480 H or V Return Grille / 38 deg deflection, 3/8\" spacing"]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},22,"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},22,"Inches",{"$nulls":11},3.361111111111111,3.1358506944444446,0.75]
[null,"Enter Air Flow (must be greater than 0) =",{"$nulls":6},1400,"CFM"]
[null,"Series =","S480 H or V",{"$nulls":4},"Tag =","R-5"]
[{"$nulls":26},"Pressure Constants",null,null,null," ",null,"Cosntants from old S480 / modified"]
[null,"S480 H or V Return Grille",{"$nulls":25},"m","b",null," "," "]
[null,"Tag : R-5",{"$nulls":24},"40 deg",0,5.02,"Ps Constant adjusted to agree with Titus!"]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":24},"2004-11-29"]
[null,"Nom","Duct ","Neck","Air"," ",null,"Nom","Duct ","Neck","Air"," ",{"$nulls":19}," ","from S480-38 Sound Analysis.XLS"]
[null,"Duct","Area","Vel","Flow","Ps","Nc","Duct","Area","Vel","Flow","Ps","Octave Band, dB",{"$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)",10.134862202084092,10.465616749309415,10.46561674930939,10.46561674930932,10.465616749309234,10.465616749309277]
[null,"22 x 22",3.361111111111111,446.44982698961934,1400,-0.04995354689513422,29.85081391606741,"559 x 559",0.31225744000000005,2.2679651211072662,660.72636,-12.43843317688842,44.30779557919585,42.21838887858601,43.06145956401988,36.26938995502407,28.968944750953654,23.32946467708421,{"$nulls":10},"B","CVn","CAn",null,"M(Vn)",58.883808514074076,51.19795851841109,50.373774050224625,68.5923471997351,88.37302945545454,92.56890595799601]
[{"$nulls":26},"40 Deg",null,-123.57991792797034,56.03015699212757,10,null,"B",-116.75140362512685,-98.63922694392306,-95.61225478871557,-150.67940141529078,-210.39415763694933,-227.1517565477972]
[{"$nulls":27},"corrrection",80,-25]
[{"$nulls":28},-43.57991792797034,31.03015699212757]
[{"$nulls":26},"Data based on a wag !!!!!  "]
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