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[{"$nulls":28},"80/880 H or V, 580,5880 H or V, 480/4880 H or V, 585/5885 H or V Supply Grille"]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W",null,null," "," "]
[null,"Enter Duct Width in inches =",{"$nulls":6},20,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",0.77,null,null," - ",null,"based on","Models 300R, 300F, 301R, &301F Supply"]
[null,"Enter Duct Height in inches =",{"$nulls":6},20,"Inches",{"$nulls":11},2.7777777777777777,2.5733506944444446,0.75]
[null,"Enter Air Flow (must be greater than 0) =",{"$nulls":6},2195,"CFM"]
[null,"Series =","800H or V",{"$nulls":4},"Tag =","F-002",{"$nulls":17},"Throw Zones"]
[{"$nulls":27},"c(ii)","c(iii)","c(iv)"]
[null,"800H or V Supply Grille",{"$nulls":24},"0 Degrees",1.8,5,13]
[null,"Tag : F-002",null,"IP Data",{"$nulls":22},"22.5 Degrees",1.395,3.875,10.075]
[null,"Nom","Duct ","Neck","Air","0°",null,"22.5°",null,"45°",{"$nulls":16},"45 Degrees",0.81,2.25,5.85]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB"]
[null,"in","ft²","FPM","CFM","\"WG","ft","\"WG","ft","\"WG","ft",null,2,3,4,5,6,7]
[null,"20 x 20",2.7777777777777777,852.973519986507,2195,0.1228480230882879,"50 - 61 - 86",0.1688876822026063,"39 - 47 - 67",0.21492734131692467,"22 - 27 - 39",36.8701575419897,60.174326178752025,51.61191420166578,52.41878681923062,46.42482941136957,39.99060730914762,34.831718335520364,{"$nulls":8},"Pressure Constants",null,null,null," "]
[{"$nulls":27},"m","b",null," "," "]
[null,"800H or V Supply Grille",{"$nulls":24},"0 Degrees",0,2.7083333333333326]
[null,"Tag : F-002",null,"Metric Data",{"$nulls":22},"22.5 Degrees",0,3.723333333333333]
[null,"Nom","Duct ","Neck","Air","0°",null,"22.5°",null,"45°",{"$nulls":16},"45 Degrees",0,4.738333333333333]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB",{"$nulls":19},"Coefficients from 880 New Sound Regression..xls"]
[null,"mm","m²","m/s","L/s","Pa","m","Pa","m","Pa","m",null,2,3,4,5,6,7,{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,"508 x 508",0.258064,4.333105481531455,1035.924543,30.589157748983688,"15.1 - 18.5 - 26.2",42.05303286844897,"11.7 - 14.3 - 20.3",53.516907987914244,"6.8 - 8.3 - 11.8",36.8701575419897,60.174326178752025,51.61191420166578,52.41878681923062,46.42482941136957,39.99060730914762,34.831718335520364,{"$nulls":10},"B","CVn","CAn",null,"M(An)",9.732037858594214,9.732037858594222,9.73203785859422,9.732037858594229,9.73203785859424,9.435504715179798]
[{"$nulls":26},"0 deg",null,-167.6,68.79,9.6,null,"M(Vn)",53.65505536290635,63.22165536290803,62.10425536290874,86.80375536290886,113.62105536291052,116.81592305706788]
[null,"1) Throw values are given for terminal velocities of 150, 100, and 50 fpm, (0.75,0.5 and 0.25 m/s) Isothermal Conditions",{"$nulls":30},"B",-101.19017272305152,-137.7916727230564,-133.7097727230585,-212.09637272305886,-297.1303727230637,-311.6532129957984]
[null,"2) NC values are based on octave band 2 - 7 sound power levels minus a room absorption of 10dB, re 1.0 E-12 watts."]
[null,"Sound data is based on 0° blade deflection. A setting of 22.5° and 45° increase sound by "]
[null,"4 or 9 dB/NC respectively.  Dash (-) in space denotes an NC or dB value of less than 10."]
[null,"3) When selecting larger supply grilles for cooling purposes, account for drop by referring to the Engineering Guidelines."]
[null,"4) See K-Select program for performance data not shown, including octave band data."]