Manualshelf

Engineering Bulletin

ManualsBrandsHart & Cooley ManualsAluminum Horizontal Return Air Grilles14" x 14" (Wall Opening Size) HX White Grille (HX Series)
12
Engineering Data
Engineering Data
124
H and V Series (Page 42-46)
Deflection E
Face Velocity
400
700
1000
1100
1200
1300
1400
1600
1800
2000
Pressure Loss
.010
.031
.062
.075
.090
.105
.122
.160
.202
.249
8x4
Ak .127
cfm
Throw
45
2.5
60
3.5
70
4.0
85
5.0
95
5.5
120
6.5
130
7.5
140
8.0
155
8.5
165
9.5
190
11
210
12
235
13
10x4
Ak .162
cfm
Throw
60
3.0
75
3.5
90
4.5
105
5.0
120
6.0
150
7.5
165
8.0
180
9.0
195
9.5
210
10
240
12
270
13
300
15
12x4
Ak .197
cfm
Throw
80
4.5
100
6.0
120
7.5
140
8.5
160
10
195
12
215
13
235
14
255
16
275
17
315
19
355
22
395
24
14x4
Ak .231
cfm
Throw
90
5.0
115
6.5
140
8.0
160
9.0
185
11
230
13
255
14
275
16
300
17
325
18
370
21
415
23
460
26
12x5
Ak .254
cfm
Throw
100
5.5
125
6.5
150
8.0
180
9.5
205
12
255
14
280
15
305
16
330
18
355
19
405
22
455
25
510
27
10x6
Ak .257
cfm
Throw
105
5.5
130
7.5
155
8.5
180
9.5
205
11
255
14
285
15
310
17
335
18
360
19
410
22
465
25
515
28
14x5
Ak .291
cfm
Throw
120
6.0
150
7.5
180
9.0
210
10
240
12
300
15
330
16
360
18
385
19
415
21
475
24
535
27
595
30
12x6
Ak .311
cfm
Throw
125
6.0
155
7.5
185
9.0
220
11
250
12
310
15
340
17
375
18
405
20
435
21
500
24
560
28
620
30
16x5
Ak .343
cfm
Throw
135
6.5
170
8.0
205
9.5
240
11
275
13
345
16
375
17
410
19
445
21
480
22
550
26
615
29
685
32
14x6
Ak .365
cfm
Throw
145
6.5
185
8.5
220
10
255
11
290
13
365
16
400
18
440
20
475
21
510
23
585
26
655
29
730
33
16x6
Ak .431
cfm
Throw
170
7.0
215
9.0
260
11
300
12
345
14
430
18
475
20
545
21
560
23
605
25
690
28
775
32
860
36
20x5
Ak .470
cfm
Throw
190
7.5
235
9.5
280
11
330
13
375
15
470
19
515
20
565
22
610
24
660
26
750
30
845
33
940
37
24x5
Ak .520
cfm
Throw
210
8.0
260
10
310
12
365
14
415
16
520
20
570
21
625
24
675
25
730
27
830
31
935
35
1040
39
20x6
Ak .528
cfm
Throw
210
8.0
265
10
315
12
370
14
420
16
530
20
580
22
635
24
685
26
740
28
845
32
950
35
1055
39
24x6
Ak .637
cfm
Throw
255
8.5
320
11
380
13
445
15
510
17
635
22
700
24
765
26
830
28
890
30
1020
35
1145
39
1275
43
20x8
Ak .723
cfm
Throw
290
9.0
360
12
435
14
505
16
580
19
725
23
795
25
870
28
940
30
1010
32
1155
37
1300
42
1445
46
30x6
Ak .800
cfm
Throw
320
10
400
12
480
15
560
17
640
19
800
24
880
27
960
29
1040
32
1120
34
1280
39
1440
44
1600
49
24x8
Ak .872
cfm
Throw
350
10
435
13
525
15
610
18
700
20
870
25
960
28
1045
30
1135
33
1220
36
1400
41
1570
48
1745
51
30x8
Ak 1.09
cfm
Throw
435
11
545
14
655
17
765
20
870
23
1090
28
1200
31
1310
34
1415
37
1525
40
1745
45
1960
51
2180
57
24x10
Ak 1.11
cfm
Throw
445
11
555
14
665
17
775
20
890
23
1110
29
1220
31
1330
34
1445
37
1555
40
1775
46
2000
52
2220
57
36x8
Ak 1.32
cfm
Throw
530
14
660
17
790
21
925
24
1055
27
1320
34
1450
38
1585
41
1715
45
1850
48
2110
55
2375
62
2640
69
24x12
Ak 1.34
cfm
Throw
535
13
670
16
805
19
940
22
1070
25
1340
31
1475
35
1610
38
1740
41
1875
44
2145
50
2410
57
2680
63
30x10
Ak 1.39
cfm
Throw
555
13
695
16
835
19
975
22
1110
26
1390
32
1530
38
1670
38
1805
42
1945
45
2225
51
2500
58
2780
64
36x10
Ak 1.67
cfm
Throw
670
14
835
18
1000
21
1170
25
1670
35
1835
39
2005
42
2170
46
2340
49
2670
56
3005
63
3340
70
30x12
Ak 1.68
cfm
Throw
670
14
840
16
1010
21
1175
25
1680
35
1850
39
2015
42
2185
46
2350
49
2690
56
3025
63
3360
70
36x12
Ak 2.03
cfm
Throw
810
15
1015
19
1220
23
1420
27
2030
39
2235
43
2435
46
2640
50
2840
54
3250
62
3655
70
4060
78
Terminal Velocity of 75 fpm
Deflection G
Face Velocity 400 500 600 700 800 900 1000 1100 1200 1300 1400 1600 1800 2000
Pressure Loss .010 .016 .022 .031 .040 .050 .062 .075 .090 .105 .122 .160 .202 .249
8x4
Ak .118
cfm
Throw
45
2.5
60
3.5
70
4.0
85
5.0
95
5.5
105
6.0
120
6.5
130
7.5
140
8.0
155
8.5
165
9.5
190
11
210
12
235
13
10x4
Ak .149
cfm
Throw
60
3.0
75
3.5
90
4.5
105
5.0
120
6.0
135
6.5
150
7.5
165
8.0
180
9.0
195
9.5
210
10
240
12
270
13
300
15
12x4
Ak .181
cfm
Throw
70
3.0
90
4.0
110
5.0
125
5.5
145
6.5
165
7.5
180
8.0
200
9.0
215
10
235
11
255
12
290
13
325
15
360
16
14x4
Ak .212
cfm
Throw
85
3.5
105
4.5
125
5.0
150
6.5
170
7.0
190
8.0
210
9.0
235
10
255
11
275
12
300
13
340
14
380
16
425
18
12x5
Ak .233
cfm
Throw
95
4.0
115
4.5
140
5.5
165
6.5
185
7.5
210
8.5
235
9.5
255
10
280
11
305
12
325
13
375
15
420
17
465
19
10x6
Ak .236
cfm
Throw
95
4.0
120
5.0
140
5.5
165
6.5
190
7.5
210
8.5
235
9.5
260
10
285
11
305
12
330
13
380
15
425
17
470
19
14x5
Ak .274
cfm
Throw
110
4.0
135
5.0
165
6.0
190
7.0
220
8.0
245
9.0
275
10
300
11
330
12
355
13
385
14
440
16
495
18
550
20
12x6
Ak .286
cfm
Throw
115
4.0
145
5.0
170
6.0
200
7.0
230
8.5
255
9.0
285
10
315
11
345
12
370
13
400
14
460
17
515
19
570
21
16x5
Ak .315
cfm
Throw
125
4.5
160
5.5
190
6.5
220
7.5
250
8.5
285
10
315
11
345
12
380
13
410
14
440
15
505
17
565
19
630
22
14x6
Ak .336
cfm
Throw
135
4.5
170
5.5
200
6.5
235
8.0
270
9.0
300
10
335
11
370
12
405
13
435
13
470
16
540
18
605
20
670
22
16x6
Ak .386
cfm
Throw
155
4.5
195
5.5
230
6.5
270
8.0
310
9.0
345
10
385
11
425
12
465
14
500
15
540
16
620
18
695
20
770
23
20x5
Ak .397
cfm
Throw
160
5.0
200
6.0
240
7.5
280
8.5
320
10
355
11
395
12
435
13
475
15
515
16
555
17
635
19
715
22
795
24
24x5
Ak .478
cfm
Throw
190
5.5
240
6.5
285
8.0
335
9.5
380
11
430
12
480
13
525
15
575
16
620
17
670
19
765
21
860
24
955
27
20x6
Ak .486
cfm
Throw
195
5.5
245
7.0
290
8.0
340
9.5
390
11
435
12
485
13
535
15
585
16
630
17
680
19
780
22
875
24
970
27
24x6
Ak .586
cfm
Throw
235
6.0
295
7.5
350
9.0
410
10
470
12
525
13
585
15
645
16
705
18
760
19
820
21
940
24
1055
27
1170
29
20x8
Ak .665
cfm
Throw
265
6.5
335
8.0
400
9.5
465
11
530
13
600
14
665
16
730
17
800
19
865
21
930
22
1065
25
1195
28
1330
32
30x6
Ak .736
cfm
Throw
295
6.5
370
8.5
440
10
515
12
590
13
660
15
735
17
810
18
885
20
955
21
1030
23
1180
27
1325
30
1470
33
24x8
Ak .802
cfm
Throw
320
7.0
400
8.5
480
10
560
12
640
14
720
15
800
17
880
19
960
21
1045
22
1125
24
1285
28
1445
31
1605
35
30x8
Ak 1.01
cfm
Throw
405
8.0
505
9.5
605
12
705
14
810
16
910
17
1010
19
1110
21
1210
23
1315
25
1415
27
1615
31
1820
35
2020
39
24x10
Ak 1.02
cfm
Throw
410
8.0
510
9.5
610
12
715
14
815
16
920
18
1020
19
1120
21
1225
23
1325
25
1430
27
1630
31
1835
35
2040
40
36x8
Ak 1.21
cfm
Throw
485
8.5
605
11
725
13
845
15
970
17
1090
19
1210
21
1330
23
1450
25
1575
28
1695
30
1935
34
2180
38
2420
42
24x12
Ak 1.23
cfm
Throw
490
8.5
615
11
740
13
860
15
985
17
1105
19
1230
21
1355
24
1475
26
1600
28
1720
30
1970
34
2215
39
2460
43
30x10
Ak 1.28
cfm
Throw
510
8.5
640
11
770
13
900
15
1025
18
1150
20
1280
22
1410
24
1535
26
1665
28
1790
31
2050
35
2305
39
2560
44
36x10
Ak 1.54
cfm
Throw
615
9.5
770
12
925
14
1080
17
1230
19
1385
22
1540
24
1695
26
1850
29
2000
31
2155
34
2465
38
2770
43
3080
48
30x12
Ak 1.55
cfm
Throw
620
9.5
775
12
930
14
1085
17
1240
19
1395
22
1550
24
1705
26
1860
29
2015
31
2170
34
2480
38
2790
43
3100
48
36x12
Ak 1.86
cfm
Throw
745
11
930
13
1115
16
1300
18
1490
21
1675
24
1860
26
2045
29
2230
31
2420
34
2605
37
2975
42
3350
47
3720
52
Terminal Velocity of 75 fpm
*NC 30 NC 35 NC 40 **NC 45
* less than or equal to ** greater than or equal to
See Alternate Sizing Graph on Page 160.
See Deflections on Page 158.