Engineering Bulletin
Engineering Data
39
Engineering Data
Recommended Noise Criteria and Face Velocity Ranges are on page 37
210 Floor Register (Page 4)
300 400 500 600 700 800 900 1000
.006 .010 .016 .022 .031 .040 .050 .062
4 x 10 CFM 60 80 100 120 140 160 180 200
Ak .20 Throw 8 11 13 16 19 22 24 26
4 x 12 and 6 x 8 CFM 75 100 125 150 175 200 225 250
Ak .25 Throw 9 12 15 18 21 25 28 31
4 x 14 CFM 85 110 140 170 195 225 250 280
Ak .28 Throw 6 10 15 19 22 25 28 32
6 x 10 and 8 x 8 CFM 95 130 160 190 225 255 290 320
Ak .32 Throw 10 14 17 21 24 27 31 34
6 x 12 CFM 115 150 190 230 265 305 340 380
Ak .38 Throw 12 15 19 23 26 30 34 38
8 x 10 CFM 125 170 210 250 295 335 380 420
Ak .42 Throw 12 15 18 24 28 32 37 41
6 x 14 CFM 130 175 220 265 310 350 395 440
Ak .44 Throw 13 16 20 24 28 32 36 41
6 x 16 CFM 145 195 245 295 345 390 440 490
Ak .49 Throw 11 16 21 25 30 35 39 44
8 x 12 and 10 x 10 CFM 160 210 265 320 370 425 475 530
Ak .53 Throw 12 17 21 26 32 37 43 48
9 x 12 and 8 x 14 CFM 180 240 300 360 420 480 540 600
Ak .60 Throw 14 20 24 29 34 39 44 50
10 x 12 CFM 195 260 325 390 455 520 585 650
Ak .65 Throw 14 18 24 30 35 41 46 51
8 x 16 and 9 x 14 CFM 205 275 345 415 485 550 620 690
Ak .69 Throw 15 21 27 32 37 42 48 53
10 x 14 and 12 x 12 CFM 235 310 390 470 545 625 700 780
Ak .78 Throw 14 21 28 34 40 46 51 56
10 x 16 CFM 265 350 440 530 615 705 790 880
Ak .88 Throw 17 23 30 36 41 48 53 60
12 x 14 CFM 280 370 465 560 650 745 835 930
Ak .93 Throw 18 24 30 37 43 50 56 62
12 x 16 and 14 x 14 CFM 320 430 535 640 750 855 965 1070
Ak 1.07 Throw 20 26 32 39 46 53 59 64
12 x 18 and 14 x 16 CFM 365 490 610 730 855 975 1100 1220
Ak 1.22 Throw 21 28 34 42 49 56 62 68
14 x 18 CFM 425 570 710 850 995 1135 1280 1420
Ak 1.42 Throw 22 30 37 45 52 58 63 68
12 x 24 and 14 x 20 CFM 475 635 795 955 1115 1270 1430 1590
Ak 1.59 Throw 23 31 39 46 52 59 65 71
Terminal Velocity of 50 FPM
Face Velocity
Pressure Loss
265 Return Air Grille (Page 4)
400 500 600 700 800 900 1000
4 x 12 CFM 120 150 175 205 235 265 295
Ak .295 Pt .011 .017 .024 .033 .043 .054 .065
4 x 14 CFM 135 170 200 235 270 300 335
Ak .335 Pt .011 .016 .023 .032 .042 .052 .064
6 x 10 CFM 150 185 220 260 295 335 370
Ak .37 Pt .010 .016 .022 .031 .041 .051 .063
6 x 12 CFM 180 225 265 310 355 400 445
Ak .445 Pt .010 .015 .021 .030 .039 .049 .060
8 x 10 CFM 195 245 295 345 390 440 490
Ak .49 Pt .010 .015 .021 .029 .038 .047 .059
6 x 14 CFM 205 255 305 355 410 460 510
Ak .51 Pt .010 .015 .020 .029 .038 .047 .058
8 x 12 CFM 235 295 350 410 470 525 585
Ak .565 Pt .009 .014 .020 .028 .036 .046 .057
8 x 14 CFM 270 340 410 475 545 610 680
Ak .68 Pt .009 .014 .019 .027 .035 .044 .055
10 x 12 CFM 290 360 430 505 575 650 720
Ak .72 Pt .009 .014 .019 .027 .035 .043 .054
12 x 12 and 6 x 24 CFM 340 425 510 595 680 765 850
Ak .85 Pt .009 .013 .019 .026 .033 .042 .053
6 x 30 CFM 410 515 620 720 825 925 1030
Ak 1.03 Pt .008 .012 .018 .024 .032 .040 .049
8 x 24 CFM 445 555 665 775 890 1000 1110
Ak 1.11 Pt .008 .012 .018 .024 .031 .039 .048
14 x 14 CFM 460 575 690 805 920 1035 1150
Ak 1.15 Pt .008 .012 .018 .024 .031 .039 .048
8 x 30 CFM 540 675 810 945 1080 1215 1350
Ak 1.35 Pt .008 .012 .017 .023 .030 .037 .046
14 x 20 CFM 630 790 950 1105 1265 1420 1580
Ak 1.58 Pt .007 .011 .016 .022 .029 .036 .045
12 x 24 CFM 655 820 985 1150 1310 1475 1690
Ak 1.64 Pt .007 .011 .016 .022 .029 .036 .044
10 x 30 CFM 670 840 1010 1175 1345 1510 1680
Ak 1.68 Pt .007 .011 .016 .022 .029 .036 .044
18 x 18 CFM 720 900 1080 1260 1440 1620 1800
Ak 1.80 Pt .007 .011 .015 .021 .028 .035 .043
14 x 24 CFM 750 935 1120 1310 1495 1685 1870
Ak 1.87 Pt .007 .011 .015 .021 .028 .035 .043
12 x 30 CFM 800 1000 1200 1400 1600 1800 2000
Ak 2.00 Pt .007 .011 .015 .021 .027 .034 .042
14 x 30 CFM 940 1175 1410 1645 1880 2115 2350
Ak 2.35 Pt .007 .010 .015 .020 .026 .033 .040
24 x 24 CFM 1240 1550 1860 2170 2480 2790 3100
Ak 3.10 Pt .006 .010 .014 .019 .024 .031 .038
*Velocity measured 1" from face
Average Face Velocity*
For sizes not listed and sizing tips see page 37
300 400 500 600 700 800 900 1000
.006 .010 .016 .022 .031 .040 .050 .062
CFM 25 35 45 55 60 70 80 90
Spread 3.0 4.0 5.0 6.5 7.5 9.0 10.0 11.0
Throw 2.0 2.5 3.0 4.0 4.5 5.0 6.0 6.5
CFM 35 45 55 65 75 90 100 110
Spread 3.0 4.5 6.0 7.0 8.5 9.5 11.0 12.0
Throw 2.0 3.0 3.5 4.0 5.0 6.0 6.5 7.0
CFM 40 50 65 80 90 105 115 130
Spread 3.5 5.0 7.0 8.0 9.5 10.5 12.0 13.0
Throw 2.5 3.0 4.0 4.5 5.5 6.5 7.0 8.0
CFM 50 70 85 100 120 135 155 170
Spread 4.0 6.0 7.5 9.0 11.0 12.0 13.5 15.5
Throw 3.0 3.5 4.5 5.5 6.5 7.0 8.0 9.0
CFM 65 85 105 125 145 170 190 210
Spread 5.0 7.0 8.5 10.0 12.0 13.5 15.5 17.0
Throw 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
CFM 75 100 125 150 175 200 225 250
Spread 5.5 7.5 9.5 11.0 13.0 15.0 17.0 18.5
Throw 3.5 4.5 5.5 6.5 7.5 9.0 10.0 11.0
CFM 80 110 135 160 190 215 245 270
Spread 6.0 8.0 10.0 11.5 13.5 15.5 17.5 19.5
Throw 3.5 4.5 6.0 7.0 8.0 9.0 10.5 11.5
CFM 100 130 165 200 230 265 295 330
Spread 6.5 8.5 11.0 13.0 15.0 17.0 19.5 21.5
Throw 4.0 5.0 6.5 7.5 9.0 10.0 11.5 12.5
CFM 115 155 195 235 275 310 350 390
Spread 7.5 9.5 12.0 14.0 17.0 19.0 21.5 23.5
Throw 4.5 5.5 7.0 8.5 10.0 11.0 12.5 14.0
Terminal Velocity of 50 FPM
6 x 12
Ak .33
6 x 14
Ak .39
2
1
/
4
x 14
Ak .13
4 x 10
Ak .17
4 x 12
Ak .21
4 x 14
Ak .25
Face Velocity
Pressure Loss
2
1
/
4
x 10
Ak .09
2
1
/
4
x 12
Ak .11
6 x 10
Ak .27
411 Floor Diffuser (Page 4)