Engineering Data

661 & A661 2-Way Supply Register (Page 19)
300 400 500 600 700 800 900 1000 300 400 500 600 700 800 900 1000
.006 .010 .016 .022 .031 .040 .050 .062 .006 .010 .016 .022 .031 .040 .050 .062
6 x 4 CFM 25 30 40 50 55 65 70 80 16 x 6 and 12 x 8 CFM 130 170 215 255 300 340 385 425
Ak .080 Throw 4.0 4.5 6.0 7.0 8.5 10.0 11.0 12.5 Ak .425 Throw 7.5 10.0 12.5 15.0 18.0 20.5 23.0 25.5
8 x 4 CFM 35 45 55 65 75 90 100 110 14 x 8 CFM 155 205 260 310 360 410 465 515
Ak .110 Throw 4.5 5.5 7.0 8.5 10.0 11.5 13.0 14.5 Ak .515 Throw 8.0 10.5 14.0 16.0 19.5 22.0 25.0 28.0
10 x 4 and 8 x 5 CFM 45 60 75 85 100 115 130 145 20 x 6 CFM 165 220 275 330 385 440 495 550
Ak .145 Throw 5.0 6.5 8.0 9.5 11.5 13.0 14.5 16.0 Ak .550 Throw 8.5 11.0 14.5 17.0 20.0 23.0 25.5 29.0
12 x 4 and 8 x 6 CFM 55 70 90 110 125 145 160 180 16 x 8 CFM 180 240 300 360 420 480 540 600
Ak .180 Throw 5.5 7.0 9.0 10.5 12.5 14.0 16.0 18.0 Ak .600 Throw 8.5 11.0 14.5 17.0 20.0 23.0 25.5 29.0
14 x 4 CFM 65 85 110 130 150 170 195 215 24 x 6 and 18 x 8 CFM 205 270 340 410 475 545 610 680
Ak .215 Throw 6.0 7.5 9.5 11.5 13.5 15.5 17.0 19.0 Ak .680 Throw 9.5 12.0 15.5 18.5 22.0 25.0 28.0 31.5
10 x 6 and 12 x 5 CFM 75 100 125 145 170 195 220 245 20 x 8 CFM 230 305 380 455 530 610 685 760
Ak .245 Throw 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 Ak .760 Throw 10.0 13.0 16.5 19.0 23.0 26.0 28.5 33.0
12 x 6 and 14 x 5 CFM 90 120 150 175 205 235 265 295 30 x 6 CFM 265 350 440 530 615 705 790 880
Ak .295 Throw 6.5 8.5 11.0 13.0 15.5 17.5 19.5 22.0 Ak .880 Throw 10.5 14.0 17.5 20.5 24.5 28.0 31.5 35.0
10 x 8 CFM 105 140 175 205 240 275 310 345 24 x 8 CFM 295 390 490 590 685 785 880 980
Ak .345 Throw 7.0 9.0 11.5 13.5 16.5 18.5 21.0 23.5 Ak .980 Throw 11.0 14.0 18.0 21.5 25.5 29.0 33.0 37.0
14 x 6 CFM 110 145 180 215 250 290 325 360 30 x 8 CFM 375 500 625 750 875 1000 1125 1250
Ak .360 Throw 7.0 9.5 12.0 14.0 16.5 19.0 21.5 24.0 Ak 1.250 Throw 12.0 16.0 20.0 24.0 28.5 32.0 37.0 41.0
Terminal Velocity of 75 FPM
Face Velocity
Pressure Loss
Face Velocity
Pressure Loss
672/674 Return Air Grille (Page 20, 10)
673 Return Air Filter Grille (Page 20)
300 400 500 600 300 400 500 600 300 400 500 600
6 x 4 CFM 34 45 56 68 16 x 6 CFM 132 177 221 265 24 x 4 CFM 132 177 221 265
Ak .110 Ps .020 .035 .054 .079 Ak .440 Ps .019 .034 .054 .078 Ak .440 Ps .019 .034 .054 .078
6 x 6 CFM 50 67 84 101 16 x 8 CFM 176 234 293 352 24 x 6 CFM 197 263 329 395
Ak .170 Ps .019 .035 .054 .079 Ak .590 Ps .019 .034 .053 .077 Ak .660 Ps .019 .034 .053 .077
8 x 4 CFM 45 60 75 90 16 x 10 CFM 219 292 365 438 24 x 8 CFM 262 349 437 524
Ak .150 Ps .019 .035 .054 .079 Ak .730 Ps .019 .034 .053 .076 Ak .870 Ps .019 .034 .053 .076
8 x 6 CFM 67 89 111 134 16 x 12 CFM 262 349 437 524 24 x 10 CFM 327 435 544 653
Ak .220 Ps .019 .035 .054 .079 Ak .870 Ps .019 .034 .053 .076 Ak 1.090 Ps .019 .033 .052 .074
8 x 8 CFM 89 118 148 178 16 x 14 CFM 305 407 509 610 24 x 12 CFM 391 521 651 782
Ak .300 Ps .019 .035 .054 .078 Ak 1.020 Ps .019 .034 .052 .075 Ak 1.300 Ps .019 .033 .052 .073
10 x 4 CFM 56 74 93 112 16 x 16 CFM 348 464 580 696 24 x 14 CFM 455 607 758 910
Ak .190 Ps .019 .035 .054 .079 Ak 1.160 Ps .019 .033 .052 .074 Ak 1.520 Ps .019 .033 .051 .072
10 x 6 CFM 83 111 139 167 16 x 24 CFM 519 692 865 1038 24 x 24 CFM 774 1032 1290 1548
Ak .280 Ps .019 .035 .054 .078 Ak 1.730 Ps .018 .033 .051 .071 Ak 2.580 Ps .018 .032 .049 .067
10 x 8 CFM 111 147 184 221 16 x 25 CFM 540 720 900 1081 30 x 4 CFM 165 220 275 330
Ak .370 Ps .019 .034 .054 .078 Ak 1.800 Ps .018 .033 .051 .071 Ak .550 Ps .019 .034 .053 .077
10 x 10 CFM 138 184 230 276 18 x 6 CFM 149 198 248 297 30 x 6 CFM 246 328 410 492
Ak .460 Ps .019 .034 .054 .078 Ak .500 Ps .019 .034 .054 .077 Ak .820 Ps .019 .034 .053 .076
12 x 6 CFM 100 133 166 199 18 x 18 CFM 439 585 732 878 30 x 8 CFM 327 435 544 653
Ak .330 Ps .019 .034 .054 .078 Ak 1.460 Ps .019 .033 .052 .073 Ak 1.090 Ps .019 .033 .052 .074
12 x 8 CFM 132 177 221 265 18 x 24 CFM 583 777 971 1166 30 x 10 CFM 407 543 678 814
Ak .440 Ps .019 .034 .054 .078 Ak 1.940 Ps .018 .032
.051 .070 Ak 1.360 Ps .019 .033 .052 .073
12 x 10 CFM 165 220 275 330 20 x 6 CFM 165 220 275 330 30 x 12 CFM 487 649 812 974
Ak .550 Ps .019 .034 .053 .077 Ak .550 Ps .019 .034 .053 .077 Ak 1.620 Ps .018 .033 .051 .072
12 x 12 CFM 197 263 329 395 20 x 10 CFM 273 364 455 546 30 x 14 CFM 567 756 945 1134
Ak .660 Ps .019 .034 .053 .077 Ak .910 Ps .019 .034 .053 .075 Ak 1.890 Ps .018 .032 .051 .071
12 x 18 CFM 294 392 491 589 20 x 12 CFM 327 435 544 653 30 x 18 CFM 726 968 1210 1452
Ak .980 Ps .019 .034 .053 .075 Ak 1.090 Ps .019 .033 .052 .074 Ak 2.420 Ps .018 .032 .050 .068
14 x 6 CFM 116 155 193 232 20 x 14 CFM 380 507 634 760 30 x 20 CFM 806 1074 1343 1611
Ak .390 Ps .019 .034 .054 .078 Ak 1.270 Ps .019 .033 .052 .074 Ak 2.690 Ps .018 .031 .049 .067
14 x 8 CFM 154 205 257 308 20 x 20 CFM 540 720 900 1081 30 x 24 CFM 964 1286 1607 1928
Ak .510 Ps .019 .034 .053 .077 Ak 1.800 Ps .018 .033 .051 .071 Ak 3.210 Ps .017 .031 .048 .064
14 x 10 CFM 192 256 320 384 20 x 24 CFM 647 862 1078 1293 30 x 30 CFM 1201 1602 2002 2403
Ak .640 Ps .019 .034 .053 .077 Ak 2.160 Ps .018 .032 .050 .069 Ak 4.000 Ps .017 .030 .046 .060
14 x 12 CFM 230 306 383 460 20 x 25 CFM 673 898 1122 1346 36 x 8 CFM 391 521 651 782
Ak .770 Ps .019 .034 .053 .076 Ak 2.240 Ps .018 .032 .050 .069 Ak 1.300 Ps .019 .033 .052 .073
14 x 14 CFM 267 357 446 535
Ak .890 Ps .019 .034 .053 .075
14 x 18 CFM 343 457 571 685
Ak 1.140 Ps .019 .033 .052 .074
Face Velocity* Face Velocity* Face Velocity*
*Filter grilles: Tested without filters. Typical capacity is 2 CFM per square inch of nominal filter area. Recommended face velocity is 300-450 FPM. Velocities higher
will decrease filter performance, increase flow resistance, and possibly be of noise concern. Velocity measured 1" from face.
For sizes not listed and sizing tips see
page 37
Recommended Noise Criteria and Face Velocity Ranges are on page 37
46
Engineering Data
Engineering Data Engineering Data