Manualshelf

Engineering Data

ManualsBrandsHart & Cooley ManualsFloor Registers & Grilles12" x 18" (Wall Opening Size) White Steel Fixed-Bar Filter Grille (96AFB Series)
1
94/94A Series Return Air Grilles & Registers (Page 10)
96AFB Steel Fixed-Bar Filter Grille (Page 10)
Face Velocity 300 400 500 600 700 800 900 1000
6 x 6 CFM 39 52 65 78 91 104 116 129
Ak .130 Ps .005 .009 .014 .020 .028 .035 .045 .055
CFM 82 110 137 165 192 220 247 275
Ps .005 .009 .014 .020 .028 .035 .045 .055
CFM 138 184 231 277 323 369 415 461
Ps .005 .009 .014 .020 .027 .037 .046 .058
CFM 95 127 158 190 221 253 285 316
Ps .005 .009 .014 .020 .028 .035 .045 .056
CFM 114 151 189 227 265 303 341 378
Ps .005 .009 .014 .020 .028 .036 .046 .057
CFM 157 209 262 314 366 418 471 523
Ps .005 .009 .014 .020 .027 .037 .047 .059
CFM 206 275 344 413 481 550 619 688
Ps .005 .009 .014 .020 .027 .039 .048 .061
CFM 280 373 467 560 654 747 840 934
Ps .005 .009 .015 .020 .028 .040 .049 .061
CFM 317 422 528 634 739 845 950 1056
Ps .005 .009 .015 .021 .028 .040 .049 .062
CFM 353 471 589 707 825 942 1060 1178
Ps .005 .009 .015 .021 .029 .041 .050 .062
CFM 426 568 710 852 995 1137 1279 1421
Ps .005 .009 .015 .022 .030 .041 .051 .063
CFM 481 641 801 961 1121 1282 1442 1602
Ps .005 .009 .016 .022 .031 .042 .052 .064
CFM 535 713 891 1069 1248 1426 1604 1782
Ps .005 .009 .016 .023 .031 .043 .053 .066
CFM 595 793 991 1189 1387 1585 1784 1982
Ps .005 .010 .016 .024 .032 .044 .054 .067
CFM 642 856 1070 1284 1498 1712 1927 2141
Ps .006 .010 .017 .024 .033 .045 .056 .068
CFM 713 951 1189 1427 1664 1902 2140 2378
Ps .006 .010 .017 .025 .035 .046 .058 .070
CFM 802 1069 1336 1603 1870 2137 2405 2672
Ps .006 .010 .018 .027 .036 .048 .060 .074
CFM 854 1139 1424 1708 1993 2278 2562 2847
Ps .006 .011 .019 .027 .037 .050 .062 .076
CFM 959 1278 1598 1917 2237 2556 2876 3196
Ps .006 .011 .020 .029 .040 .052 .066 .080
CFM 1062 1416 1770 2124 2478 2832 3187 3541
Ps .007 .011 .021 .031 .042 .056 .070 .085
CFM 1266 1688 2110 2532 2955 3377 3799 4221
Ps .008 .013 .024 .035 .047 .063 .081 .097
CFM 1317 1756 2194 2633 3072 3511 3950 4389
Ps .008
.013 .024 .036 .049 .065 .083 .101
CFM 1565 2087 2608 3130 3651 4173 4695 5216
Ps .010 .015 .029 .041 .056 .076 .099 .120
CFM 1662 2217 2771 3325 3879 4433 4987 5542
Ps .011 .016 .030 .043 .060 .080 .106 .129
CFM 1855 2473 3091 3709 4328 4946 5564 6182
Ps .012 .017 .034 .048 .067 .087 .122 .148
CFM 2407 3210 4012 4815 5617 6420 7222 8025
Ps .012 .024 .034 .048 .067 .087 .122 .148
CFM 3089 4119 5148 6178 7208 8237 9267 10297
Ps .012 .024 .034 .048 .067 .087 .122 .148
Face Velocity 300 400 500 600 700 800 900 1000
6 x 6 CFM 45 60 75 90 105 120 135 150
Ak .150 Ps .010 .019 .029 .046 .060 .075 .100 .130
CFM 84 112 140 169 197 225 253 281
Ps .010 .019 .029 .046 .060 .075 .100 .130
CFM 135 180 225 270 315 360 405 450
Ps .011 .019 .030 .042 .057 .072 .094 .119
CFM 96 127 159 191 223 255 287 318
Ps .011 .019 .029 .045 .059 .074 .099 .128
CFM 112 150 187 225 262 300 337 375
Ps .011 .019 .029 .044 .058 .074 .097 .124
CFM 152 203 254 304 355 406 456 507
Ps .011 .019 .030 .041 .056 .072 .093 .116
CFM 198 264 330 395 461 527 593 659
Ps .011 .019 .030 .039 .054 .070 .089 .109
CFM 267 355 444 533 622 711 800 888
Ps .011 .020 .031 .040 .055 .074 .091 .111
CFM 301 401 502 602 703 803 903 1004
Ps .011 .020 .031 .041 .056 .076 .092 .112
CFM 336 448 560 672 784 895 1007 1119
Ps .011 .020 .031 .041 .056 .078 .093 .114
CFM 406 541 676 811 946 1082 1217 1352
Ps .011 .020 .031 .043 .058 .081 .095 .116
CFM 458 611 764 917 1069 1222 1375 1528
Ps .011 .020 .032 .043 .058 .083 .096 .117
CFM 511 682 852 1023 1193 1364 1534 1704
Ps .011 .020 .032 .044 .059 .084 .097 .118
CFM 571 761 951 1141 1331 1522 1712 1902
Ps .011 .020 .032 .044 .059 .086 .098 .119
CFM 618 824 1030 1236 1442 1649 1855 2061
Ps .011 .020 .032 .045 .060 .087 .099 .120
CFM 690 920 1150 1380 1610 1840 2070 2300
Ps .011 .020 .032 .045 .060 .089 .100 .120
CFM 781 1041 1301
1561 1822 2082 2342 2602
Ps .011 .020 .032 .045 .060 .090 .100 .121
CFM 835 1114 1392 1671 1949 2228 2506 2785
Ps .011 .020 .031 .046 .060 .090 .100 .121
CFM 946 1261 1576 1892 2207 2522 2838 3153
Ps .011 .019 .031 .045 .059 .090 .099 .120
CFM 1057 1410 1762 2115 2467 2820 3172 3525
Ps .011 .019 .030 .045 .058 .089 .098 .119
CFM 1284 1712 2140 2568 2996 3424 3852 4280
Ps .011 .018 .028 .043 .055 .085 .092 .114
CFM 1341 1789 2236 2683 3130 3577 4024 4471
Ps .011
.017 .028 .042 .054 .083 .091 .112
CFM 1633 2177 2721 3265 3810 4354 4898 5442
Ps .010 .015 .024 .037 .047 .070 .079 .100
CFM 1751 2335 2919 3503 4086 4670 5254 5838
Ps .009 .014 .022 .035 .043 .064 .073 .095
CFM 1992 2656 3320 3984 4648 5312 5976 6640
Ps .008 .012 .017 .029 .034 .048 .059 .081
CFM 2742 3656 4570 5484 6398 7312 8226 9140
Ps .008 .012 .017 .029 .034 .048 .059 .081
CFM 3808 5077 6346 7615 8884 10154 11423 12692
Ps .008 .012 .017 .029 .034 .048 .059 .081
48 x 48
Ak 10.300
For sizes not listed and sizing tips see page(s) 76
36 x 18
Ak 3.200
30 x 24
Ak 3.540
36 x 36
Ak 6.180
48 x 36
Ak 8.020
36 x 24
Ak 4.220
30 x 30
Ak 4.390
36 x 30
Ak 5.220
48 x 24
Ak 5.540
30 x 12
Ak 1.780
20 x 20
Ak 1.980
36 x 12
Ak 2.140
24 x 20
Ak 2.380
30 x 18
Ak 2.670
24 x 24
Ak 2.850
12 x 12
Ak .690
24 x 8
Ak .930
18 x 12
Ak 1.060
30 x 8
Ak 1.180
24 x 12
Ak 1.420
18 x 18
Ak 1.600
10 x 10
Ak .450
12 x 6
Ak .320
14 x 6
Ak .370
14 x 8
Ak .510
8 x 8
Ak .270
10 x 10
Ak .460
12 x 6
Ak .320
8 x 8
Ak .280
14 x 6
Ak .380
14 x 8
Ak .520
24 x 12
Ak 1.350
18 x 18
Ak 1.530
30 x 12
Ak 1.700
20 x 20
Ak 1.900
12 x 12
Ak .660
24 x 8
Ak .890
18 x 12
Ak 1.000
30 x 8
Ak 1.120
36 x 18
Ak 3.150
30 x 24
Ak 3.520
36 x 24
Ak 4.280
30 x 30
Ak 4.470
36 x 12
Ak 2.060
24 x 20
Ak 2.300
30 x 18
Ak 2.600
24 x 24
Ak 2.780
48 x 48
Ak 12.700
For sizes not listed and sizing tips see page(s) 76
36 x 30
Ak 5.440
48 x 24
Ak 5.840
36 x 36
Ak 6.640
48 x 36
Ak 9.140
PFG Perforated Face Grille (Page 11)
PFG Perforated Face Grille
Return Air Grille Balancing Data
To Determine CFM:
1. Use an ALNOR Velometer with No. 2220 or 2220A Tip or a 4" rotating vane anemometer. If a 4" rotating vane anemometer is used,
place dial face against perforated plate, and sample in a random manner for at least 1 minute.
2. Select proper Ak from Table by unit size and instrument used for measuring velocity.
3. Determine CFM by the following equation: CFM = Ak x Average Velocity.
Sample Problem
Determine Return Airflow Rate (CFM) through a 10 x 10, using an ALNOR Velometer with Tip No. 2220 or 2220A.
Solution
1. Assume the average of 6 velocity readings taken with an ALNOR Velometer is 2000 FPM.
2. From Table, the Area Factor for a 10 x 10 using an ALNOR Velometer is Ak = .39 sq. ft.
3. CFM = Ak x Average Velocity = .39 sq. ft. x 2000 FPM = 780 CFM
Neck Velocity 200 300 400 500 600 650 700 750 800 900
S.P. Drop w/OBD .012 .027 .049 .078 .110 .130 .150 .170 .190 .240
Size
Ak
ALNOR
Ak
4" ROT.
Vane
10 x 10 .39 .55 140 210 285 350 415 450 485 520 555 625
12 x12 .46 .79 200 300 400 500 600 650 700 750 800 900
14 x 14 .62 1.07 270 410 545 680 815 885 955 1020 1090 1225
10 x 22 .71 1.21 305 460 610 765 915 995 1070 1150 1220 1375
16 x 16 .82 1.40 355 530 710 890 1065 1155 1245 1335 1425 1600
18 x 18 1.05 1.77 450 675 900 1125 1350 1460 1575 1690 1800 2030
20 x 20 1.28 2.25 555 835 1110 1390 1665 1805 1945 2080 2220 2500
22 x 22 1.55 2.70 670 1010 1345 1680 2020 2180 2350 2520 2690 3020
Air Capacities - CFM
Recommended Noise Criteria and Face Velocity Ranges are on page 75
Engineering Data
79
Engineering Data

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