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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},18,"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},18,"Inches",{"$nulls":11},2.25,2.06640625,0.75]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":6},220,"FPM"]
[null,"Enter Maximum Neck Velocity =",{"$nulls":6},700,"FPM"]
[{"$nulls":26},"Pressure Constants",null,null,null," ",null,"Cosntants from old S480 / modified"]
[{"$nulls":27},"m","b",null," "," "]
[null,"S480 H or V Return Grille / 38 deg deflection",{"$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,null,null,220,454.609375,-0.012130155657488064,10.818549687651569,null,null,1.1176000000000001,214.551712546875,-3.020408758714528,24.374032723005545,24.5869590813267,25.68334284507281,13.291795176129387," - "," - ",{"$nulls":10},"B","CVn","CAn",null,"M(Vn)",58.883808514074076,51.19795851841109,50.373774050224625,68.5923471997351,88.37302945545454,92.56890595799601]
[null,null,null,280,578.59375,-0.01964884718072447,16.68688781991341,null,null,1.4224,273.06581596875003,-4.892562948000394,30.541249047680456,29.949195212661582,30.959257727239045,20.475838703084083," - "," - ",{"$nulls":8},"40 Deg",null,-123.57991792797034,56.03015699212757,10,null,"B",-116.75140362512685,-98.63922694392306,-95.61225478871557,-150.67940141529078,-210.39415763694933,-227.1517565477972]
[null,null,null,340,702.578125,-0.028972024669537605,21.41140028340166,null,null,1.7272,331.57991939062504,-7.214034142714864,35.50638393497846,34.266252420967696,35.206818971207454,26.259606171210113,16.619230044617115," - ",{"$nulls":9},"corrrection",80,-25]
[null,18,null,400,826.5625,-0.04009968812392748,25.366068956302882,457.2,null,2.032,390.0940228125,-9.984822342857942,39.6624663979357,37.87985933443223,38.762254059497806,31.100927724345656,22.856693401465595,17.01701686643398,{"$nulls":10},-43.57991792797034,31.03015699212757]
[null,"x",2.25,460,950.546875,-0.0530318375438941,28.76697848039882,"x",0.20903184000000002,2.3368,448.608126234375,-13.204927548429632,43.236586406535594,40.98746484701356,41.819833354807216,35.26433506415465,28.220745434917763,22.63574954198089,{"$nulls":8},"Data based on a wag !!!!!  "]
[null,18,null,520,1074.53125,-0.06776847292943747,31.750332874264217,457.2,null,2.6416,507.12222965625,-16.87434975942993,46.37188493662313,43.713526359286355,44.502010743127514,38.91656970687792,32.92621263113087,27.564628330664338]
[null,null,null,580,1198.515625,-0.08430959428055752,34.4075434550345,null,null,2.9464,565.6363330781251,-20.993088975858825,49.16442894183865,46.14157161905734,46.89096934301857,42.16953776057467,37.11727261614487,31.95467628995306]
[null,null,null,640,1322.5,-0.10265520159725436,36.802943629744675,null,null,3.2512000000000003,624.1504365000001,-25.561145197716336,51.681828370543286,48.33038573922905,49.04454794494312,45.10199644508474,40.89539464116449,35.91218034505804,{"$nulls":21}," "]
[null,null,null,700,1446.484375,-0.12280529487952793,38.98352897925628,null,null,3.556,682.6645399218751,-30.578518425002454,53.973472318413684,50.322911269468726,51.00499780962868,47.77147794258208,44.33470203681568,39.514783139490454]
[{"$nulls":26}," "," "]
[null,"1) Performance data does not include damper",{"$nulls":37}," "]
[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."]
[{"$nulls":27}," ",null,null," "]