Engineering Data

A618 Adjustable
Fin Register
(Page 16)
Deflection A
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 45 60 80 95 110 125 140 155 170 185
Ak .156 Throw 5.0 6.5 8.5 10.0 12.0 13.0 15.0 16.0 18.0 19.0
10 x 4 CFM 60 80 100 120 140 160 180 200 220 240
Ak .198 Throw 6.0 7.5 9.5 12.0 13.0 15.0 17.0 19.0 20.0 22.0
12 x 4 CFM 70 95 120 145 170 190 215 240 265 290
Ak .240 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 25.0
10 x 6 CFM 95 125 155 190 220 250 280 315 345 375
Ak .313 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 26.0 28.0
12 x 6 CFM 115 150 190 225 265 305 340 380 415 455
Ak .379 Throw 8.0 10.0 13.0 15.0 18.0 21.0 23.0 26.0 28.0 31.0
10 x 8 CFM 130 170 215 255 300 340 385 425 470 510
Ak .425 Throw 8.0 11.0 14.0 16.0 19.0 21.0 24.0 27.0 30.0 32.0
14 x 6 CFM 135 180 225 270 310 355 400 445 490 545
Ak .446 Throw 8.0 11.0 14.0 17.0 19.0 22.0 25.0 28.0 30.0 33.0
12 x 8 CFM 160 200 265 320 370 425 475 530 585 635
Ak .530 Throw 9.0 11.0 15.0 18.0 21.0 24.0 27.0 30.0 33.0 36.0
14 x 8 CFM 185 250 310 370 435 495 560 620 680 745
Ak .620 Throw 10.0 13.0 16.0 20.0 23.0 26.0 30.0 33.0 36.0 39.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 55 70 85 100 115 125 140 155 170
Ak .141 Throw 3.5 5.0 6.5 7.5 9.0 10.0 11.0 13.0 14.0 15.0
10 x 4 CFM 55 70 90 105 125 140 160 180 195 215
Ak .178 Throw 4.0 5.5 7.0 8.5 10.0 11.0 13.0 14.0 16.0 17.0
12 x 4 CFM 65 85 110 130 150 175 195 215 240 260
Ak .216 Throw 4.5 6.0 8.0 9.5 11.0 13.0 14.0 16.0 18.0 19.0
10 x 6 CFM 85 115 140 170 195 225 255 280 310 340
Ak .282 Throw 5.5 7.5 9.0 11.0 12.0 14.0 16.0 18.0 20.0 22.0
12 x 6 CFM 105 135 170 205 240 275 310 340 375 410
Ak .342 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
10 x 8 CFM 115 155 195 235 275 310 350 390 430 470
Ak .390 Throw 6.0 8.0 11.0 13.0 15.0 17.0 19.0 21.0 23.0 26.0
14 x 6 CFM 125 165 205 245 290 330 370 410 455 495
Ak .412 Throw 7.0 9.0 11.0 13.0 16.0 18.0 20.0 22.0 24.0 27.0
12 x 8 CFM 140 190 235 280 330 375 425 470 515 565
Ak .470 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 25.0 28.0
14 x 8 CFM 165 220 275 330 385 440 495 550 605 660
Ak .550 Throw 8.0 10.0 13.0 15.0 18.0 20.0 23.0 25.0 28.0 30.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 50 65 75 90 100 115 125 140 150
Ak .127 Throw 3.0 4.0 5.0 5.5 7.0 7.5 8.5 9.5 11.0 11.5
10 x 4 CFM 50 65 80 95 115 130 145 160 180 195
Ak .162 Throw 3.0 4.5 5.5 6.5 7.5 8.5 9.5 11.0 12.0 13.0
12 x 4 CFM 60 80 100 120 140 160 175 195 215 235
Ak .197 Throw 4.0 4.5 6.0 7.5 8.5 10.0 11.0 12.0 13.0 14.0
10 x 6 CFM 75 105 130 155 180 205 230 255 285 310
Ak .257 Throw 4.0 5.5 7.5 8.5 9.5 11.0 12.0 14.0 15.0 17.0
12 x 6 CFM 95 125 155 185 220 250 280 310 340 375
Ak .311 Throw 4.5 6.0 7.5 9.0 11.0 12.0 14.0 15.0 17.0 18.0
10 x 8 CFM 105 140 175 210 245 280 315 350 385 420
Ak .350 Throw 5.0 6.0 8.0 10.0 11.0 13.0 14.0 16.0 18.0 19.0
14 x 6 CFM 110 145 185 220 255 290 330 365 400 440
Ak .365 Throw 5.5 6.5 8.5 10.0 11.0 13.0 15.0 16.0 18.0 20.0
12 x 8 CFM 130 175 220 260 305 350 390 435 480 520
Ak .435 Throw 5.0 7.0 9.0 11.0 13.0 15.0 16.0 18.0 20.0 22.0
14 x 8 CFM 155 205 255 305 355 410 460 510 560 610
Ak .510 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 23.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 35 45 60 70 85 95 105 120 130 140
Ak .118 Throw 2.0 2.5 3.5 4.0 5.0 5.5 6.0 6.5 7.5 8.0
10 x 4 CFM 45 60 75 90 105 120 135 150 165 180
Ak .149 Throw 2.0 3.0 3.5 4.5 5.0 6.0 6.5 7.5 8.0 9.0
12 x 4 CFM 55 70 90 110 125 145 165 180 200 215
Ak .181 Throw 2.5 3.0 4.0 5.0 5.5 6.5 7.5 8.0 9.0 10.0
10 x 6 CFM 70 95 120 140 165 190 210 235 260 285
Ak .236 Throw 3.0 4.0 5.0 5.5 6.5 7.5 8.5 9.5 10.0 11.0
12 x 6 CFM 85 115 145 170 200 230 255 285 315 345
Ak .286 Throw 3.0 4.0 5.0 6.0 7.0 8.5 9.0 10.0 11.0 12.0
10 x 8 CFM 95 130 160 190 225 255 290 320 350 385
Ak .320 Throw 3.0 4.5 5.5 6.5 7.5 8.5 10.0 11.0 12.0 13.0
14 x 6 CFM 100 135 170 200 235 270 300 335 370 405
Ak .336 Throw 3.5 4.5 5.5 6.5 8.0 9.0 10.0 11.0 12.0 13.0
12 x 8 CFM 120 160 200 235 275 315 355 395 435 475
Ak .395 Throw 3.5 5.0 6.0 7.0 8.0 10.0 11.0 12.0 13.0 15.0
14 x 8 CFM 140 185 230 275 320 370 415 460 505 550
Ak .460 Throw 4.0 5.5 6.5 8.0 9.0 10.5 11.5 13.0 14.5 15.5
Terminal Velocity of 75 FPM
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
For sizes not listed or sizing tips see page 37
A618 Adjustable
Fin Register
(Page 16)
Deflection C
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 45 60 80 95 110 125 140 155 170 185
Ak .156 Throw 5.0 6.5 8.5 10.0 12.0 13.0 15.0 16.0 18.0 19.0
10 x 4 CFM 60 80 100 120 140 160 180 200 220 240
Ak .198 Throw 6.0 7.5 9.5 12.0 13.0 15.0 17.0 19.0 20.0 22.0
12 x 4 CFM 70 95 120 145 170 190 215 240 265 290
Ak .240 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 25.0
10 x 6 CFM 95 125 155 190 220 250 280 315 345 375
Ak .313 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 26.0 28.0
12 x 6 CFM 115 150 190 225 265 305 340 380 415 455
Ak .379 Throw 8.0 10.0 13.0 15.0 18.0 21.0 23.0 26.0 28.0 31.0
10 x 8 CFM 130 170 215 255 300 340 385 425 470 510
Ak .425 Throw 8.0 11.0 14.0 16.0 19.0 21.0 24.0 27.0 30.0 32.0
14 x 6 CFM 135 180 225 270 310 355 400 445 490 545
Ak .446 Throw 8.0 11.0 14.0 17.0 19.0 22.0 25.0 28.0 30.0 33.0
12 x 8 CFM 160 200 265 320 370 425 475 530 585 635
Ak .530 Throw 9.0 11.0 15.0 18.0 21.0 24.0 27.0 30.0 33.0 36.0
14 x 8 CFM 185 250 310 370 435 495 560 620 680 745
Ak .620 Throw 10.0 13.0 16.0 20.0 23.0 26.0 30.0 33.0 36.0 39.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 55 70 85 100 115 125 140 155 170
Ak .141 Throw 3.5 5.0 6.5 7.5 9.0 10.0 11.0 13.0 14.0 15.0
10 x 4 CFM 55 70 90 105 125 140 160 180 195 215
Ak .178 Throw 4.0 5.5 7.0 8.5 10.0 11.0 13.0 14.0 16.0 17.0
12 x 4 CFM 65 85 110 130 150 175 195 215 240 260
Ak .216 Throw 4.5 6.0 8.0 9.5 11.0 13.0 14.0 16.0 18.0 19.0
10 x 6 CFM 85 115 140 170 195 225 255 280 310 340
Ak .282 Throw 5.5 7.5 9.0 11.0 12.0 14.0 16.0 18.0 20.0 22.0
12 x 6 CFM 105 135 170 205 240 275 310 340 375 410
Ak .342 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
10 x 8 CFM 115 155 195 235 275 310 350 390 430 470
Ak .390 Throw 6.0 8.0 11.0 13.0 15.0 17.0 19.0 21.0 23.0 26.0
14 x 6 CFM 125 165 205 245 290 330 370 410 455 495
Ak .412 Throw 7.0 9.0 11.0 13.0 16.0 18.0 20.0 22.0 24.0 27.0
12 x 8 CFM 140 190 235 280 330 375 425 470 515 565
Ak .470 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 25.0 28.0
14 x 8 CFM 165 220 275 330 385 440 495 550 605 660
Ak .550 Throw 8.0 10.0 13.0 15.0 18.0 20.0 23.0 25.0 28.0 30.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 50 65 75 90 100 115 125 140 150
Ak .127 Throw 3.0 4.0 5.0 5.5 7.0 7.5 8.5 9.5 11.0 11.5
10 x 4 CFM 50 65 80 95 115 130 145 160 180 195
Ak .162 Throw 3.0 4.5 5.5 6.5 7.5 8.5 9.5 11.0 12.0 13.0
12 x 4 CFM 60 80 100 120 140 160 175 195 215 235
Ak .197 Throw 4.0 4.5 6.0 7.5 8.5 10.0 11.0 12.0 13.0 14.0
10 x 6 CFM 75 105 130 155 180 205 230 255 285 310
Ak .257 Throw 4.0 5.5 7.5 8.5 9.5 11.0 12.0 14.0 15.0 17.0
12 x 6 CFM 95 125 155 185 220 250 280 310 340 375
Ak .311 Throw 4.5 6.0 7.5 9.0 11.0 12.0 14.0 15.0 17.0 18.0
10 x 8 CFM 105 140 175 210 245 280 315 350 385 420
Ak .350 Throw 5.0 6.0 8.0 10.0 11.0 13.0 14.0 16.0 18.0 19.0
14 x 6 CFM 110 145 185 220 255 290 330 365 400 440
Ak .365 Throw 5.5 6.5 8.5 10.0 11.0 13.0 15.0 16.0 18.0 20.0
12 x 8 CFM 130 175 220 260 305 350 390 435 480 520
Ak .435 Throw 5.0 7.0 9.0 11.0 13.0 15.0 16.0 18.0 20.0 22.0
14 x 8 CFM 155 205 255 305 355 410 460 510 560 610
Ak .510 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 23.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 35 45 60 70 85 95 105 120 130 140
Ak .118 Throw 2.0 2.5 3.5 4.0 5.0 5.5 6.0 6.5 7.5 8.0
10 x 4 CFM 45 60 75 90 105 120 135 150 165 180
Ak .149 Throw 2.0 3.0 3.5 4.5 5.0 6.0 6.5 7.5 8.0 9.0
12 x 4 CFM 55 70 90 110 125 145 165 180 200 215
Ak .181 Throw 2.5 3.0 4.0 5.0 5.5 6.5 7.5 8.0 9.0 10.0
10 x 6 CFM 70 95 120 140 165 190 210 235 260 285
Ak .236 Throw 3.0 4.0 5.0 5.5 6.5 7.5 8.5 9.5 10.0 11.0
12 x 6 CFM 85 115 145 170 200 230 255 285 315 345
Ak .286 Throw 3.0 4.0 5.0 6.0 7.0 8.5 9.0 10.0 11.0 12.0
10 x 8 CFM 95 130 160 190 225 255 290 320 350 385
Ak .320 Throw 3.0 4.5 5.5 6.5 7.5 8.5 10.0 11.0 12.0 13.0
14 x 6 CFM 100 135 170 200 235 270 300 335 370 405
Ak .336 Throw 3.5 4.5 5.5 6.5 8.0 9.0 10.0 11.0 12.0 13.0
12 x 8 CFM 120 160 200 235 275 315 355 395 435 475
Ak .395 Throw 3.5 5.0 6.0 7.0 8.0 10.0 11.0 12.0 13.0 15.0
14 x 8 CFM 140 185 230 275 320 370 415 460 505 550
Ak .460 Throw 4.0 5.5 6.5 8.0 9.0 10.5 11.5 13.0 14.5 15.5
Terminal Velocity of 75 FPM
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
For sizes not listed or sizing tips see page 37
A618 Adjustable
Fin Register
(Page 16)
Deflection E
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 45 60 80 95 110 125 140 155 170 185
Ak .156 Throw 5.0 6.5 8.5 10.0 12.0 13.0 15.0 16.0 18.0 19.0
10 x 4 CFM 60 80 100 120 140 160 180 200 220 240
Ak .198 Throw 6.0 7.5 9.5 12.0 13.0 15.0 17.0 19.0 20.0 22.0
12 x 4 CFM 70 95 120 145 170 190 215 240 265 290
Ak .240 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 25.0
10 x 6 CFM 95 125 155 190 220 250 280 315 345 375
Ak .313 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 26.0 28.0
12 x 6 CFM 115 150 190 225 265 305 340 380 415 455
Ak .379 Throw 8.0 10.0 13.0 15.0 18.0 21.0 23.0 26.0 28.0 31.0
10 x 8 CFM 130 170 215 255 300 340 385 425 470 510
Ak .425 Throw 8.0 11.0 14.0 16.0 19.0 21.0 24.0 27.0 30.0 32.0
14 x 6 CFM 135 180 225 270 310 355 400 445 490 545
Ak .446 Throw 8.0 11.0 14.0 17.0 19.0 22.0 25.0 28.0 30.0 33.0
12 x 8 CFM 160 200 265 320 370 425 475 530 585 635
Ak .530 Throw 9.0 11.0 15.0 18.0 21.0 24.0 27.0 30.0 33.0 36.0
14 x 8 CFM 185 250 310 370 435 495 560 620 680 745
Ak .620 Throw 10.0 13.0 16.0 20.0 23.0 26.0 30.0 33.0 36.0 39.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 55 70 85 100 115 125 140 155 170
Ak .141 Throw 3.5 5.0 6.5 7.5 9.0 10.0 11.0 13.0 14.0 15.0
10 x 4 CFM 55 70 90 105 125 140 160 180 195 215
Ak .178 Throw 4.0 5.5 7.0 8.5 10.0 11.0 13.0 14.0 16.0 17.0
12 x 4 CFM 65 85 110 130 150 175 195 215 240 260
Ak .216 Throw 4.5 6.0 8.0 9.5 11.0 13.0 14.0 16.0 18.0 19.0
10 x 6 CFM 85 115 140 170 195 225 255 280 310 340
Ak .282 Throw 5.5 7.5 9.0 11.0 12.0 14.0 16.0 18.0 20.0 22.0
12 x 6 CFM 105 135 170 205 240 275 310 340 375 410
Ak .342 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
10 x 8 CFM 115 155 195 235 275 310 350 390 430 470
Ak .390 Throw 6.0 8.0 11.0 13.0 15.0 17.0 19.0 21.0 23.0 26.0
14 x 6 CFM 125 165 205 245 290 330 370 410 455 495
Ak .412 Throw 7.0 9.0 11.0 13.0 16.0 18.0 20.0 22.0 24.0 27.0
12 x 8 CFM 140 190 235 280 330 375 425 470 515 565
Ak .470 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 25.0 28.0
14 x 8 CFM 165 220 275 330 385 440 495 550 605 660
Ak .550 Throw 8.0 10.0 13.0 15.0 18.0 20.0 23.0 25.0 28.0 30.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 50 65 75 90 100 115 125 140 150
Ak .127 Throw 3.0 4.0 5.0 5.5 7.0 7.5 8.5 9.5 11.0 11.5
10 x 4 CFM 50 65 80 95 115 130 145 160 180 195
Ak .162 Throw 3.0 4.5 5.5 6.5 7.5 8.5 9.5 11.0 12.0 13.0
12 x 4 CFM 60 80 100 120 140 160 175 195 215 235
Ak .197 Throw 4.0 4.5 6.0 7.5 8.5 10.0 11.0 12.0 13.0 14.0
10 x 6 CFM 75 105 130 155 180 205 230 255 285 310
Ak .257 Throw 4.0 5.5 7.5 8.5 9.5 11.0 12.0 14.0 15.0 17.0
12 x 6 CFM 95 125 155 185 220 250 280 310 340 375
Ak .311 Throw 4.5 6.0 7.5 9.0 11.0 12.0 14.0 15.0 17.0 18.0
10 x 8 CFM 105 140 175 210 245 280 315 350 385 420
Ak .350 Throw 5.0 6.0 8.0 10.0 11.0 13.0 14.0 16.0 18.0 19.0
14 x 6 CFM 110 145 185 220 255 290 330 365 400 440
Ak .365 Throw 5.5 6.5 8.5 10.0 11.0 13.0 15.0 16.0 18.0 20.0
12 x 8 CFM 130 175 220 260 305 350 390 435 480 520
Ak .435 Throw 5.0 7.0 9.0 11.0 13.0 15.0 16.0 18.0 20.0 22.0
14 x 8 CFM 155 205 255 305 355 410 460 510 560 610
Ak .510 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 23.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 35 45 60 70 85 95 105 120 130 140
Ak .118 Throw 2.0 2.5 3.5 4.0 5.0 5.5 6.0 6.5 7.5 8.0
10 x 4 CFM 45 60 75 90 105 120 135 150 165 180
Ak .149 Throw 2.0 3.0 3.5 4.5 5.0 6.0 6.5 7.5 8.0 9.0
12 x 4 CFM 55 70 90 110 125 145 165 180 200 215
Ak .181 Throw 2.5 3.0 4.0 5.0 5.5 6.5 7.5 8.0 9.0 10.0
10 x 6 CFM 70 95 120 140 165 190 210 235 260 285
Ak .236 Throw 3.0 4.0 5.0 5.5 6.5 7.5 8.5 9.5 10.0 11.0
12 x 6 CFM 85 115 145 170 200 230 255 285 315 345
Ak .286 Throw 3.0 4.0 5.0 6.0 7.0 8.5 9.0 10.0 11.0 12.0
10 x 8 CFM 95 130 160 190 225 255 290 320 350 385
Ak .320 Throw 3.0 4.5 5.5 6.5 7.5 8.5 10.0 11.0 12.0 13.0
14 x 6 CFM 100 135 170 200 235 270 300 335 370 405
Ak .336 Throw 3.5 4.5 5.5 6.5 8.0 9.0 10.0 11.0 12.0 13.0
12 x 8 CFM 120 160 200 235 275 315 355 395 435 475
Ak .395 Throw 3.5 5.0 6.0 7.0 8.0 10.0 11.0 12.0 13.0 15.0
14 x 8 CFM 140 185 230 275 320 370 415 460 505 550
Ak .460 Throw 4.0 5.5 6.5 8.0 9.0 10.5 11.5 13.0 14.5 15.5
Terminal Velocity of 75 FPM
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
For sizes not listed or sizing tips see page 37
A618 Adjustable
Fin Register
(Page 16)
Deflection G
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 45 60 80 95 110 125 140 155 170 185
Ak .156 Throw 5.0 6.5 8.5 10.0 12.0 13.0 15.0 16.0 18.0 19.0
10 x 4 CFM 60 80 100 120 140 160 180 200 220 240
Ak .198 Throw 6.0 7.5 9.5 12.0 13.0 15.0 17.0 19.0 20.0 22.0
12 x 4 CFM 70 95 120 145 170 190 215 240 265 290
Ak .240 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 25.0
10 x 6 CFM 95 125 155 190 220 250 280 315 345 375
Ak .313 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 26.0 28.0
12 x 6 CFM 115 150 190 225 265 305 340 380 415 455
Ak .379 Throw 8.0 10.0 13.0 15.0 18.0 21.0 23.0 26.0 28.0 31.0
10 x 8 CFM 130 170 215 255 300 340 385 425 470 510
Ak .425 Throw 8.0 11.0 14.0 16.0 19.0 21.0 24.0 27.0 30.0 32.0
14 x 6 CFM 135 180 225 270 310 355 400 445 490 545
Ak .446 Throw 8.0 11.0 14.0 17.0 19.0 22.0 25.0 28.0 30.0 33.0
12 x 8 CFM 160 200 265 320 370 425 475 530 585 635
Ak .530 Throw 9.0 11.0 15.0 18.0 21.0 24.0 27.0 30.0 33.0 36.0
14 x 8 CFM 185 250 310 370 435 495 560 620 680 745
Ak .620 Throw 10.0 13.0 16.0 20.0 23.0 26.0 30.0 33.0 36.0 39.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 55 70 85 100 115 125 140 155 170
Ak .141 Throw 3.5 5.0 6.5 7.5 9.0 10.0 11.0 13.0 14.0 15.0
10 x 4 CFM 55 70 90 105 125 140 160 180 195 215
Ak .178 Throw 4.0 5.5 7.0 8.5 10.0 11.0 13.0 14.0 16.0 17.0
12 x 4 CFM 65 85 110 130 150 175 195 215 240 260
Ak .216 Throw 4.5 6.0 8.0 9.5 11.0 13.0 14.0 16.0 18.0 19.0
10 x 6 CFM 85 115 140 170 195 225 255 280 310 340
Ak .282 Throw 5.5 7.5 9.0 11.0 12.0 14.0 16.0 18.0 20.0 22.0
12 x 6 CFM 105 135 170 205 240 275 310 340 375 410
Ak .342 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0
10 x 8 CFM 115 155 195 235 275 310 350 390 430 470
Ak .390 Throw 6.0 8.0 11.0 13.0 15.0 17.0 19.0 21.0 23.0 26.0
14 x 6 CFM 125 165 205 245 290 330 370 410 455 495
Ak .412 Throw 7.0 9.0 11.0 13.0 16.0 18.0 20.0 22.0 24.0 27.0
12 x 8 CFM 140 190 235 280 330 375 425 470 515 565
Ak .470 Throw 7.0 9.0 12.0 14.0 16.0 19.0 21.0 23.0 25.0 28.0
14 x 8 CFM 165 220 275 330 385 440 495 550 605 660
Ak .550 Throw 8.0 10.0 13.0 15.0 18.0 20.0 23.0 25.0 28.0 30.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 40 50 65 75 90 100 115 125 140 150
Ak .127 Throw 3.0 4.0 5.0 5.5 7.0 7.5 8.5 9.5 11.0 11.5
10 x 4 CFM 50 65 80 95 115 130 145 160 180 195
Ak .162 Throw 3.0 4.5 5.5 6.5 7.5 8.5 9.5 11.0 12.0 13.0
12 x 4 CFM 60 80 100 120 140 160 175 195 215 235
Ak .197 Throw 4.0 4.5 6.0 7.5 8.5 10.0 11.0 12.0 13.0 14.0
10 x 6 CFM 75 105 130 155 180 205 230 255 285 310
Ak .257 Throw 4.0 5.5 7.5 8.5 9.5 11.0 12.0 14.0 15.0 17.0
12 x 6 CFM 95 125 155 185 220 250 280 310 340 375
Ak .311 Throw 4.5 6.0 7.5 9.0 11.0 12.0 14.0 15.0 17.0 18.0
10 x 8 CFM 105 140 175 210 245 280 315 350 385 420
Ak .350 Throw 5.0 6.0 8.0 10.0 11.0 13.0 14.0 16.0 18.0 19.0
14 x 6 CFM 110 145 185 220 255 290 330 365 400 440
Ak .365 Throw 5.5 6.5 8.5 10.0 11.0 13.0 15.0 16.0 18.0 20.0
12 x 8 CFM 130 175 220 260 305 350 390 435 480 520
Ak .435 Throw 5.0 7.0 9.0 11.0 13.0 15.0 16.0 18.0 20.0 22.0
14 x 8 CFM 155 205 255 305 355 410 460 510 560 610
Ak .510 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 23.0
Terminal Velocity of 75 FPM
300 400 500 600 700 800 900 1000 1100 1200
.006 .010 .016 .022 .031 .040 .050 .062 .075 .090
8 x 4 CFM 35 45 60 70 85 95 105 120 130 140
Ak .118 Throw 2.0 2.5 3.5 4.0 5.0 5.5 6.0 6.5 7.5 8.0
10 x 4 CFM 45 60 75 90 105 120 135 150 165 180
Ak .149 Throw 2.0 3.0 3.5 4.5 5.0 6.0 6.5 7.5 8.0 9.0
12 x 4 CFM 55 70 90 110 125 145 165 180 200 215
Ak .181 Throw 2.5 3.0 4.0 5.0 5.5 6.5 7.5 8.0 9.0 10.0
10 x 6 CFM 70 95 120 140 165 190 210 235 260 285
Ak .236 Throw 3.0 4.0 5.0 5.5 6.5 7.5 8.5 9.5 10.0 11.0
12 x 6 CFM 85 115 145 170 200 230 255 285 315 345
Ak .286 Throw 3.0 4.0 5.0 6.0 7.0 8.5 9.0 10.0 11.0 12.0
10 x 8 CFM 95 130 160 190 225 255 290 320 350 385
Ak .320 Throw 3.0 4.5 5.5 6.5 7.5 8.5 10.0 11.0 12.0 13.0
14 x 6 CFM 100 135 170 200 235 270 300 335 370 405
Ak .336 Throw 3.5 4.5 5.5 6.5 8.0 9.0 10.0 11.0 12.0 13.0
12 x 8 CFM 120 160 200 235 275 315 355 395 435 475
Ak .395 Throw 3.5 5.0 6.0 7.0 8.0 10.0 11.0 12.0 13.0 15.0
14 x 8 CFM 140 185 230 275 320 370 415 460 505 550
Ak .460 Throw 4.0 5.5 6.5 8.0 9.0 10.5 11.5 13.0 14.5 15.5
Terminal Velocity of 75 FPM
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
For sizes not listed or sizing tips see page 37
For sizes not listed or sizing tips see page 37
621 Sidewall/Ceiling Register
4-Way Deflection (Page 17)
SS
L
SS
L
L
0
0
10'
10'
10'
20' 30' 40' 50' 60'
0
0
10'
10'
10'
20' 30' 40' 50'
0
0
10'
10'
10'
20' 30'
0
0
10'
10'
10'
20' 30'
55 42 22 0 22 42 0 2222 0 22

22424255
0
0
10'
10'
10'
20' 30' 40' 50' 60'
0
0
10'
10'
10'
20' 30' 40'
50'
0
0
10'
10'
10'
20' 30'
0
0
10'
10'
10'
20' 30'
55 42 22 0 22 42 0 2222
0 22

22
424255
0
0
10'
10'
10'
20' 30' 40' 50' 60'
0
0
10'
10'
10'
20' 30' 40' 50'
0
0
10'
10'
10'
20' 30'
0
0
10'
10'
10'
20' 30'
55 42 22 0 22 42
0 2222
0 22

22
4242
55
0
0
10'
10'
10'
20' 30' 40' 50' 60'
0
0
10'
10'
10'
20' 30' 40' 50'
0
0
10'
10'
10'
20' 30'
0
0
10'
10'
10'
20' 30'
55 42 22 0 22 42
0 2222 0 22

224242
55
Recommended Noise Criteria and Face Velocity Ranges are on page 37
44
Engineering Data
Engineering Data
Engineering Data
300 400 500 600 700 800 900 1000
.006 .010 .016 .022 .031 .040 .050 .062
6 x 6 CFM 40 55 70 85 100 110 125 140
Ak .14 Throw L/S 4.5/3.5 6.5/5.0 8.0/6.5 10.0/8.0 11.5/9.5 12.5/10.5 14.5/12.0 16.0/13.5
8 x 8 CFM 85 110 140 170 195 225 250 280
Ak .28 Throw L/S 6.5/5.5 9.0/7.5 11.0/9.5 13.5/11.5 15.5/13.0 18.0/15.0 20.0/16.5 22.5/18.5
10 x 10 CFM 130 175 220 265 310 350 395 440
Ak .44 Throw L/S 8.0/6.5 11.0/9.0 14.0/11.5 17.0/14.0 20.0/16.5 22.0/18.0 25.0/21.0 28.0/23.0
12 x 12 CFM 205 270 340 410 475 545 610 680
Ak .68 Throw L/S 10.5/8.5 14.0/11.0 17.5/14.0 21.0/17.0 24.5/19.5 28.0/22.5 30.0/25.0 33.0/28.0
14 x 14 CFM 280 370 465 560 650 745 835 930
Ak .93 Throw L/S 11.0/9.5 14.5/12.5 18.5/16.0 22.0/19.0 26.5/22.0 30.0/25.5 32.5/28.0 36.0/31.0
16 x 16 CFM 385 510 640 770 895 1025 1150 1280
Ak 1.28 Throw L/S 13.0/11.0 17.5/14.0 22.0/18.0 26.5/21.5 30.0/25.0 35.0/28.0 39.0/32.0 43.0/36.0
Terminal Velocity of 75 FPM
Face Velocity
Pressure Loss