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[{"$nulls":28},"S480HZ or VZ Return Grille / 0 deg deflection, 3/8\" spacing"]
[{"$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},400,"FPM",{"$nulls":22},"New Version!"]
[null,"Enter Maximum Neck Velocity =",{"$nulls":6},1100,"FPM"]
[{"$nulls":26},"Pressure Constants",null,null,null," ",null,"Constants from Titus 30R Catalog"]
[{"$nulls":27},"m","b",null," "," "]
[null,"S480HZ or VZ Return Grille / 0 deg deflection",{"$nulls":24},"0 deg",0,3.25,"Modified to agree with Titus"]
[null,"IP Data",{"$nulls":5},"Metric Data",{"$nulls":24}," "]
[null,"Nom","Duct ","Neck","Air"," ",null,"Nom","Duct ","Neck","Air"," ",{"$nulls":19}," ","From S480Z - Titus version sound regression.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",{"$nulls":5},"M(An)",10.20107373683118,10.201073736831187,10.201073736831223,10.20107373683145,10.201073736831662,10.210736005948204]
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[null,null,null,487.5,1007.373046875,-0.03333701552834238,21.783210422214324,null,null,2.4765,475.42709030273437,-8.300916866557253,38.57115017881482,36.112343333552246,36.923928556047734,30.827844168599338,24.283059817282144,18.884968620177357,{"$nulls":8},"0 Deg",null,-120.10858737958739,51.614937023767276,10,null,"B",-85.56995496677152,-67.36939209029781,-64.34241993509163,-119.40956656167391,-179.12432278333932,-195.04088191357454]
[null,null,null,575,1188.18359375,-0.046378122852052894,25.48365169781681,null,null,2.9210000000000003,560.7601577929688,-11.548152590161171,41.79645734483229,38.786627129165396,39.539123909426,34.74918777968054,29.622544325153477,24.504918770453326]
[null,18,null,662.5,1368.994140625,-0.061567177264374585,28.658901350842825,457.2,null,3.3655000000000004,646.0932252832032,-15.330227138829272,44.56400713067015,41.081358503528634,41.78315307242294,38.113987816523206,34.204213123071575,29.32724763224071]
[null,"x",2.25,750,1549.8046875,-0.07890417876530742,31.43967573708136,"x",0.20903184000000002,3.81,731.4262927734376,-19.64714051256155,46.98773200211882,43.09100527982102,43.7483965966565,41.06076390650708,38.21668100172709,33.55047731375494,{"$nulls":8}," "]
[null,18,null,837.5,1730.615234375,-0.09838912735485139,33.913246871887935,457.2,null,4.2545,816.7593602636719,-24.498892711357996,49.14369830790669,44.87863835123969,45.496531820595045,43.68199787392072,41.78587553009242,37.30714994694277]
[null,null,null,925,1911.42578125,-0.12002202303300649,36.140788426539075,null,null,4.699000000000001,902.0924277539062,-29.885483735218617,51.0852250620769,46.48846751484088,47.07079172348519,46.042515226632105,45.00006614571375,40.69017147395495]
[null,null,null,1012.5,2092.236328125,-0.14380286579977275,38.16684499002136,null,null,5.1435,987.4254952441406,-35.806913584143416,52.85113735908861,47.95268484276866,48.502657091930395,48.18951969695894,47.923527653969494,43.76719284529288,{"$nulls":21}," "]
[null,null,null,1100,2273.046875,-0.1697316556551502,40.024861596634196,null,null,5.588,1072.7585627343751,-42.263182258132396,54.47058591388621,49.29546083432547,49.815764376769685,50.15845286113617,50.60451895946229,46.58900784784255]
[{"$nulls":26}," "," "]
[null,"1) Performance data does not include damper",{"$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," "]