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[]
[{"$nulls":8},"Input Data",{"$nulls":12},"Nominal Duct","Core Area","H & W"]
[null,"Enter Duct Width in inches =",{"$nulls":6},16,"Inches",{"$nulls":11},"Area '( ft2 )","( ft2 )","border",null,null," Free area & Core Area Ratio",null,"Ak/Ac",0.78,null,null," - "]
[null,"Enter Duct Height in inches =",{"$nulls":6},16,"Inches",{"$nulls":11},1.7777777777777777,1.6150173611111112,0.75]
[null,"Enter Minimum Neck Velocity (greater than 0)=",{"$nulls":6},450,"FPM"]
[null,"Enter Maximum Neck Velocity =",{"$nulls":6},1300,"FPM",{"$nulls":16},"Throw Zones"]
[{"$nulls":27},"c(ii)","c(iii)","c(iv)"]
[{"$nulls":26},"0 Degrees",1.8,5,13]
[null,"680MP H or V Supply Grille",{"$nulls":24},"22.5 Degrees",1.395,3.875,10.075]
[null,null,null,"IP Data",{"$nulls":22},"45 Degrees",0.81,2.25,5.85]
[null,"Nom","Duct ","Neck","Air","0°",null,"22.5°",null,"45°"]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB"]
[null,"in","ft²","FPM","CFM","\"WG","ft","\"WG","ft","\"WG","ft",null,2,3,4,5,6,7,{"$nulls":8},"Pressure Constants",null,null,null," "]
[null,null,null,450,726.7578125,0.02104111433741531,"22 - 32 - 50",0.028615915498884818,"17 - 25 - 38",0.036190716660354325,"10 - 15 - 22",10.877098083029969,38.24986354582406,27.030586380106847,28.14778671721404,15.294209201208096," - "," - ",{"$nulls":9},"m","b",null," "," "]
[null,null,null,556.25,898.3534071180555,0.03215020576131688,"27 - 39 - 55",0.04372427983539095,"21 - 30 - 43",0.05529835390946502,"12 - 18 - 25",17.209734210626568,43.18921435290846,32.85061456440126,33.86494983959579,23.285146797111757,11.87187661143138," - ",{"$nulls":8},"0 Degrees",0,1.666666666666667]
[null,null,null,662.5,1069.949001736111,0.04560531649212933,"32 - 43 - 60",0.062023230429295875,"25 - 33 - 47",0.07844114436646242,"14 - 19 - 27",22.43198612508657,47.262483950079506,37.650140814645134,38.579647709417905,29.874928416915076,20.497516586601073,14.987991949426194,{"$nulls":8},"22.5 Degrees",0,2.2666666666666666]
[null,16,null,768.75,1241.5445963541667,0.06140644652985267,"37 - 46 - 65",0.08351276728059961,"29 - 35 - 50",0.10561908803134656,"17 - 21 - 29",26.87576826943921,50.72856007998117,41.7342120930011,42.59153579009838,35.48238557848577,27.83735111261074,22.534212520106102,{"$nulls":8},"45 Degrees",0,2.8666666666666663]
[null,"x",1.7777777777777777,875,1413.1401909722222,0.07955359587448692,"40 - 49 - 69",0.10819289038930219,"31 - 38 - 54",0.13683218490411744,"18 - 22 - 31",30.74334322782902,53.745204192680625,45.28871843272395,46.08321863427678,40.362746539901416,34.2254591002167,29.101945312033813,{"$nulls":14},"Coefficients from 880 New Sound Regression..xls"]
[null,16,null,981.25,1584.7357855902778,0.10004676452603202,"42 - 52 - 73",0.13606359975540352,"33 - 40 - 57",0.17208043498477502,"19 - 23 - 33",34.16713274275423,56.415703043883546,48.43536243254572,49.17424782956336,44.68310978263522,39.880562720310756,34.91606266250766,{"$nulls":8},"Sound",{"$nulls":6},"2","3","4","5","6","7","NC"]
[null,null,null,1087.5,1756.3313802083335,0.12288595248448805,"44 - 54 - 77",0.1671248953789037,"34 - 42 - 60",0.21136383827331937,"20 - 25 - 35",37.23857844288306,58.8113795824004,51.25818379494478,51.94717773353357,48.55886237987962,44.95369692497007,40.131846418579975,{"$nulls":10},"B","CVn","CAn",null,"M(An)",9.732037858594214,9.732037858594222,9.73203785859422,9.732037858594229,9.73203785859424,9.435504715179798]
[null,null,null,1193.75,1927.926974826389,0.14807115974985496,"47 - 57 - 81",0.20137677725980271,"36 - 44 - 63",0.25468239476975046,"21 - 26 - 36",40.0234809864942,60.983557226792804,53.81765681182903,54.46141379588624,52.07303593861146,49.55354524722548,44.861036144643485,{"$nulls":8},"0 deg",null,-172.6,68.79,9.6,null,"M(Vn)",53.65505536290635,63.22165536290803,62.10425536290874,86.80375536290886,113.62105536291052,116.81592305706788]
[null,null,null,1300,2099.5225694444443,0.17560238632213274,"49 - 60 - 84",0.23881924539810048,"38 - 46 - 65",0.3020361044740682,"22 - 27 - 38",42.570772465611405,62.97040219462962,56.15875266880857,56.76113236694098,55.287376197243724,53.7609292590622,49.18672600404869,{"$nulls":10},-167.6,null,null,null,"B",-106.19017272305152,-142.7916727230564,-138.7097727230585,-217.09637272305886,-302.1303727230637,-316.6532129957984]
[]
[null,"1) Throw values are given for terminal velocities of 150, 100, and 50 fpm, Isothermal Conditions"]
[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."]
[]
[null,"680MP H or V Supply Grille"]
[null,null,null,"Metric Data"]
[null,"Nom","Duct ","Neck","Air","0°",null,"22.5°",null,"45°"]
[null,"Duct","Area","Vel","Flow","Pt","Throw","Pt","Throw","Pt","Throw","Nc","Octave Band, dB"]
[null,"mm","m²","m/s","L/s","Pa","m","Pa","m","Pa","m",null,2,3,4,5,6,7]
[null,null,null,2.286,342.99146003906253,5.239237470016413,"6.6 - 9.8 - 15.1",7.125362959222319,"5.1 - 7.6 - 11.7",9.011488448428226,"3.0 - 4.4 - 6.8",10.877098083029969,38.24986354582406,27.030586380106847,28.14778671721404,15.294209201208096," - "," - "]
[null,null,null,2.82575,423.9755547705078,8.005401234567902,"8.1 - 11.8 - 16.8",10.887345679012347,"6.3 - 9.2 - 13.0",13.76929012345679,"3.6 - 5.3 - 7.5",17.209734210626568,43.18921435290846,32.85061456440126,33.86494983959579,23.285146797111757,11.87187661143138," - "]
[null,null,null,3.3655000000000004,504.95964950195315,11.355723806540203,"9.7 - 12.9 - 18.3",15.443784376894673,"7.5 - 10.0 - 14.2",19.53184494724914,"4.3 - 5.8 - 8.2",22.43198612508657,47.262483950079506,37.650140814645134,38.579647709417905,29.874928416915076,20.497516586601073,14.987991949426194]
[null,406.4,null,3.90525,585.9437442333985,15.290205185933315,"11.2 - 13.9 - 19.7",20.794679052869306,"8.7 - 10.8 - 15.3",26.299152919805294,"5.0 - 6.3 - 8.9",26.87576826943921,50.72856007998117,41.7342120930011,42.59153579009838,35.48238557848577,27.83735111261074,22.534212520106102]
[null,"x",0.16516096,4.445,666.9278389648438,19.808845372747243,"12.1 - 14.9 - 21.0",26.940029706936244,"9.4 - 11.5 - 16.3",34.071214041125245,"5.5 - 6.7 - 9.5",30.74334322782902,53.745204192680625,45.28871843272395,46.08321863427678,40.362746539901416,34.2254591002167,29.101945312033813]
[null,406.4,null,4.98475,747.9119336962891,24.911644366981974,"12.8 - 15.7 - 22.2",33.879836339095476,"10.0 - 12.2 - 17.2",42.84802831120898,"5.8 - 7.1 - 10.0",34.16713274275423,56.415703043883546,48.43536243254572,49.17424782956336,44.68310978263522,39.880562720310756,34.91606266250766]
[null,null,null,5.524500000000001,828.8960284277344,30.598602168637527,"13.5 - 16.6 - 23.4",41.614098949347024,"10.5 - 12.8 - 18.2",52.62959573005652,"6.1 - 7.5 - 10.5",37.23857844288306,58.8113795824004,51.25818379494478,51.94717773353357,48.55886237987962,44.95369692497007,40.131846418579975]
[null,null,null,6.06425,909.8801231591798,36.869718777713885,"14.2 - 17.4 - 24.5",50.142817537690874,"11.0 - 13.4 - 19.0",63.41591629766786,"6.4 - 7.8 - 11.0",40.0234809864942,60.983557226792804,53.81765681182903,54.46141379588624,52.07303593861146,49.55354524722548,44.861036144643485]
[null,null,null,6.604,990.864217890625,43.72499419421105,"14.8 - 18.1 - 25.6",59.46599210412702,"11.5 - 14.0 - 19.8",75.20699001404299,"6.7 - 8.1 - 11.5",42.570772465611405,62.97040219462962,56.15875266880857,56.76113236694098,55.287376197243724,53.7609292590622,49.18672600404869]
[]
[null,"1) Throw values are given for terminal velocities of 0.75,0.5 and 0.25 m/s Isothermal Conditions"]
[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."]