Engineering Data

Engineering Data

672/674 Return Air Grille (Page 20, 10) 673 Return Air Filter Grille (Page 20) Face Velocity* 6x4 CFM Ak .110 Ps 6x6 CFM Ak .170 Ps 8x4 CFM Ak .150 Ps 8x6 CFM Ak .220 Ps 8x8 CFM Ak .300 Ps 10 x 4 CFM Ak .190 Ps 10 x 6 CFM Ak .280 Ps 10 x 8 CFM Ak .370 Ps 10 x 10 CFM Ak .460 Ps 12 x 6 CFM Ak .330 Ps 12 x 8 CFM Ak .440 Ps 12 x 10 CFM Ak .550 Ps 12 x 12 CFM Ak .660 Ps 12 x 18 CFM Ak .980 Ps 14 x 6 CFM Ak .390 Ps 14 x 8 CFM Ak .510 Ps 14 x 10 CFM Ak .640 Ps 14 x 12 CFM Ak .770 Ps 14 x 14 CFM Ak .890 Ps 14 x 18 CFM Ak 1.140 Ps

300 34 .020 50 .019 45 .019 67 .019 89 .019 56 .019 83 .019 111 .019 138 .019 100 .019 132 .019 165 .019 197 .019 294 .019 116 .019 154 .019 192 .019 230 .019 267 .019 343 .019

400 45 .035 67 .035 60 .035 89 .035 118 .035 74 .035 111 .035 147 .034 184 .034 133 .034 177 .034 220 .034 263 .034 392 .034 155 .034 205 .034 256 .034 306 .034 357 .034 457 .033

500 56 .054 84 .054 75 .054 111 .054 148 .054 93 .054 139 .054 184 .054 230 .054 166 .054 221 .054 275 .053 329 .053 491 .053 193 .054 257 .053 320 .053 383 .053 446 .053 571 .052

600 68 .079 101 .079 90 .079 134 .079 178 .078 112 .079 167 .078 221 .078 276 .078 199 .078 265 .078 330 .077 395 .077 589 .075 232 .078 308 .077 384 .077 460 .076 535 .075 685 .074

Face Velocity* 16 x 6 CFM Ak .440 Ps 16 x 8 CFM Ak .590 Ps 16 x 10 CFM Ak .730 Ps 16 x 12 CFM Ak .870 Ps 16 x 14 CFM Ak 1.020 Ps 16 x 16 CFM Ak 1.160 Ps 16 x 24 CFM Ak 1.730 Ps 16 x 25 CFM Ak 1.800 Ps 18 x 6 CFM Ak .500 Ps 18 x 18 CFM Ak 1.460 Ps 18 x 24 CFM Ak 1.940 Ps 20 x 6 CFM Ak .550 Ps 20 x 10 CFM Ak .910 Ps 20 x 12 CFM Ak 1.090 Ps 20 x 14 CFM Ak 1.270 Ps 20 x 20 CFM Ak 1.800 Ps 20 x 24 CFM Ak 2.160 Ps 20 x 25 CFM Ak 2.240 Ps

300 132 .019 176 .019 219 .019 262 .019 305 .019 348 .019 519 .018 540 .018 149 .019 439 .019 583 .018 165 .019 273 .019 327 .019 380 .019 540 .018 647 .018 673 .018

400 177 .034 234 .034 292 .034 349 .034 407 .034 464 .033 692 .033 720 .033 198 .034 585 .033 777 .032 220 .034 364 .034 435 .033 507 .033 720 .033 862 .032 898 .032

500 221 .054 293 .053 365 .053 437 .053 509 .052 580 .052 865 .051 900 .051 248 .054 732 .052 971 .051 275 .053 455 .053 544 .052 634 .052 900 .051 1078 .050 1122 .050

600 265 .078 352 .077 438 .076 524 .076 610 .075 696 .074 1038 .071 1081 .071 297 .077 878 .073 1166 .070 330 .077 546 .075 653 .074 760 .074 1081 .071 1293 .069 1346 .069

Face Velocity* 24 x 4 CFM Ak .440 Ps 24 x 6 CFM Ak .660 Ps 24 x 8 CFM Ak .870 Ps 24 x 10 CFM Ak 1.090 Ps 24 x 12 CFM Ak 1.300 Ps 24 x 14 CFM Ak 1.520 Ps 24 x 24 CFM Ak 2.580 Ps 30 x 4 CFM Ak .550 Ps 30 x 6 CFM Ak .820 Ps 30 x 8 CFM Ak 1.090 Ps 30 x 10 CFM Ak 1.360 Ps 30 x 12 CFM Ak 1.620 Ps 30 x 14 CFM Ak 1.890 Ps 30 x 18 CFM Ak 2.420 Ps 30 x 20 CFM Ak 2.690 Ps 30 x 24 CFM Ak 3.210 Ps 30 x 30 CFM Ak 4.000 Ps 36 x 8 CFM Ak 1.300 Ps

300 132 .019 197 .019 262 .019 327 .019 391 .019 455 .019 774 .018 165 .019 246 .019 327 .019 407 .019 487 .018 567 .018 726 .018 806 .018 964 .017 1201 .017 391 .019

400 177 .034 263 .034 349 .034 435 .033 521 .033 607 .033 1032 .032 220 .034 328 .034 435 .033 543 .033 649 .033 756 .032 968 .032 1074 .031 1286 .031 1602 .030 521 .033

500 221 .054 329 .053 437 .053 544 .052 651 .052 758 .051 1290 .049 275 .053 410 .053 544 .052 678 .052 812 .051 945 .051 1210 .050 1343 .049 1607 .048 2002 .046 651 .052

600 265 .078 395 .077 524 .076 653 .074 782 .073 910 .072 1548 .067 330 .077 492 .076 653 .074 814 .073 974 .072 1134 .071 1452 .068 1611 .067 1928 .064 2403 .060 782 .073

For sizes not listed and sizing tips see page 37

*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.

661 & A661 2-Way Supply Register (Page 19) Face Velocity Pressure Loss 6x4 Ak .080 8x4 Ak .110 10 x 4 and 8 x 5 Ak .145 12 x 4 and 8 x 6 Ak .180 14 x 4 Ak .215 10 x 6 and 12 x 5 Ak .245 12 x 6 and 14 x 5 Ak .295 10 x 8 Ak .345 14 x 6 Ak .360

CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw

300 .006 25 4.0 35 4.5 45 5.0 55 5.5 65 6.0 75 6.0 90 6.5 105 7.0 110 7.0

400 .010 30 4.5 45 5.5 60 6.5 70 7.0 85 7.5 100 8.0 120 8.5 140 9.0 145 9.5

500 .016 40 6.0 55 7.0 75 8.0 90 9.0 110 9.5 125 10.0 150 11.0 175 11.5 180 12.0

600 .022 50 7.0 65 8.5 85 9.5 110 10.5 130 11.5 145 12.0 175 13.0 205 13.5 215 14.0

700 .031 55 8.5 75 10.0 100 11.5 125 12.5 150 13.5 170 14.0 205 15.5 240 16.5 250 16.5

800 .040 65 10.0 90 11.5 115 13.0 145 14.0 170 15.5 195 16.0 235 17.5 275 18.5 290 19.0

900 1000 .050 .062 70 80 11.0 12.5 100 110 13.0 14.5 130 145 14.5 16.0 160 180 16.0 18.0 195 215 17.0 19.0 220 245 18.0 20.0 265 295 19.5 22.0 310 345 21.0 23.5 325 360 21.5 24.0

Face Velocity Pressure Loss 16 x 6 and 12 x 8 Ak .425 14 x 8 Ak .515 20 x 6 Ak .550 16 x 8 Ak .600 24 x 6 and 18 x 8 Ak .680 20 x 8 Ak .760 30 x 6 Ak .880 24 x 8 Ak .980 30 x 8 Ak 1.250

CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw CFM Throw

300 .006 130 7.5 155 8.0 165 8.5 180 8.5 205 9.5 230 10.0 265 10.5 295 11.0 375 12.0

400 .010 170 10.0 205 10.5 220 11.0 240 11.0 270 12.0 305 13.0 350 14.0 390 14.0 500 16.0

500 .016 215 12.5 260 14.0 275 14.5 300 14.5 340 15.5 380 16.5 440 17.5 490 18.0 625 20.0

600 .022 255 15.0 310 16.0 330 17.0 360 17.0 410 18.5 455 19.0 530 20.5 590 21.5 750 24.0

700 800 900 1000 .031 .040 .050 .062 300 340 385 425 18.0 20.5 23.0 25.5 360 410 465 515 19.5 22.0 25.0 28.0 385 440 495 550 20.0 23.0 25.5 29.0 420 480 540 600 20.0 23.0 25.5 29.0 475 545 610 680 22.0 25.0 28.0 31.5 530 610 685 760 23.0 26.0 28.5 33.0 615 705 790 880 24.5 28.0 31.5 35.0 685 785 880 980 25.5 29.0 33.0 37.0 875 1000 1125 1250 28.5 32.0 37.0 41.0

Terminal Velocity of 75 FPM

46

Recommended Noise Criteria and Face Velocity Ranges are on page 37