Manualshelf

Engineering Bulletin

ManualsBrandsHart & Cooley ManualsAluminum Horizontal Return Air Grilles14" x 14" (Wall Opening Size) HX White Grille (HX Series)
12
Engineering Data
123
H and V Series (Page 42-46)
Deflection A
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 .156
cfm
Throw
60
6.5
80
8.5
95
10
110
12
125
13
140
15
155
16
170
18
185
19
205
22
220
23
250
26
280
29
310
33
10x4
Ak .198
cfm
Throw
80
7.5
100
9.5
120
12
140
13
160
15
180
17
200
19
220
20
240
22
260
24
275
26
315
29
355
33
395
37
12x4
Ak .240
cfm
Throw
95
8
120
10
145
12
170
14
190
16
215
18
240
20
265
22
290
25
310
26
335
28
385
33
430
36
480
41
14x4
Ak .282
cfm
Throw
115
9
140
11
170
13
195
15
225
18
255
20
280
22
310
24
340
27
365
29
395
31
450
35
510
40
565
44
12x5
Ak .310
cfm
Throw
125
9
155
12
185
14
215
16
250
19
280
21
310
23
340
25
370
28
405
30
435
32
495
37
560
42
620
46
10x6
Ak .313
cfm
Throw
125
9
155
12
190
14
220
16
250
19
280
21
315
23
345
26
375
28
405
30
440
33
500
37
565
42
625
46
14x5
Ak .364
cfm
Throw
145
10
180
12
220
15
255
18
290
20
330
23
365
25
400
28
435
30
475
33
510
35
580
40
655
45
730
50
12x6
Ak .379
cfm
Throw
150
10
190
13
225
15
265
18
305
21
340
23
380
26
415
28
455
31
495
33
530
36
605
41
680
46
760
51
16x5
Ak .418
cfm
Throw
165
11
210
13
250
16
295
19
335
22
375
24
420
27
460
30
500
32
545
35
585
38
670
43
750
48
835
54
14x6
Ak .446
cfm
Throw
180
11
225
14
270
17
310
19
355
22
400
25
445
28
490
30
535
33
580
36
625
39
715
44
805
50
890
55
16x6
Ak .512
cfm
Throw
205
11
255
14
305
17
360
20
410
22
460
25
510
28
565
31
615
34
665
36
715
39
820
45
920
50
1025
56
20x5
Ak .526
cfm
Throw
210
12
265
15
315
18
370
21
420
24
475
27
525
30
580
33
630
36
685
39
735
42
840
48
945
54
1050
60
24x5
Ak .634
cfm
Throw
255
13
315
16
380
20
445
23
505
26
570
30
635
33
695
36
760
40
825
43
890
46
1015
53
1140
59
1270
66
20x6
Ak .645
cfm
Throw
260
13
325
17
385
20
450
23
515
27
580
30
645
33
710
37
775
40
840
43
905
47
1030
53
1160
60
1290
67
24x6
Ak .777
cfm
Throw
310
15
390
18
465
22
545
26
620
29
700
33
775
37
855
40
930
44
1010
48
1090
51
1245
59
1400
66
1555
73
20x8
Ak .882
cfm
Throw
355
16
440
19
530
23
615
27
705
31
795
35
880
39
970
43
1060
47
1145
51
1235
55
1410
62
1590
70
1765
78
30x6
Ak .976
cfm
Throw
390
16
490
21
585
25
685
29
780
33
880
37
975
41
1075
45
1170
49
1270
53
1365
57
1560
66
1755
74
1950
82
24x8
Ak 1.06
cfm
Throw
425
17
530
21
635
23
740
30
850
34
955
38
1060
43
1165
47
1270
51
1380
56
1485
60
1695
68
1910
77
2120
85
30x8
Ak 1.34
cfm
Throw
535
19
670
24
805
29
940
34
1070
38
1205
43
1340
48
1475
53
1610
58
1740
62
1875
67
2145
77
2410
87
2680
96
24x10
Ak 1.35
cfm
Throw
540
19
675
24
810
29
945
34
1080
39
1215
43
1350
48
1485
53
1620
58
1755
63
1890
68
2160
77
2430
87
2700
97
36x8
Ak 1.61
cfm
Throw
645
21
805
26
965
32
1125
37
1290
42
1450
47
1610
52
1770
58
1930
63
2095
68
2255
73
2575
84
2900
94
3220
105
24x12
Ak 1.64
cfm
Throw
655
21
820
27
985
32
1150
37
1310
43
1475
48
1640
53
1805
59
1970
64
2130
69
2295
75
2625
85
2950
96
3280
107
30x10
Ak 1.69
cfm
Throw
675
21
845
27
1015
32
1185
38
1350
43
1520
48
1690
54
1860
59
2030
65
2195
70
2365
75
2705
86
3040
97
3380
108
36x10
Ak 2.04
cfm
Throw
815
24
1020
30
1225
36
1430
42
1630
47
1835
53
2040
59
2245
65
2450
71
2650
77
2855
83
3265
95
3670
107
4080
119
30x12
Ak 2.05
cfm
Throw
820
24
1025
30
1230
36
1435
42
1640
48
1845
54
2050
59
2255
65
2460
71
2665
77
2870
83
3280
95
3690
107
4100
119
36x12
Ak 2.47
cfm
Throw
990
26
1235
33
1480
39
1730
46
1975
52
2225
59
2470
65
2715
72
2965
78
3210
85
3460
91
3950
104
4451
17
4940
130
Terminal Velocity of 75 fpm
Deflection C
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 .141
cfm
Throw
55
5.0
70
6.5
85
7.5
100
9.0
115
10
125
11
140
13
155
14
170
15
185
17
195
18
225
20
255
23
10x4
Ak .178
cfm
Throw
70
5.5
90
7.0
105
8.5
125
10
140
11
160
13
180
14
195
16
215
17
230
18
250
20
285
23
320
26
12x4
Ak .216
cfm
Throw
85
6.0
110
8.0
130
9.5
150
11
175
13
195
14
215
16
240
18
260
19
280
20
300
22
345
25
390
28
14x4
Ak .254
cfm
Throw
100
7.0
125
8.5
150
10
180
12
205
14
230
16
255
17
280
19
305
21
330
22
355
24
405
27
455
31
12x5
Ak .279
cfm
Throw
110
7.0
140
9.0
165
11
195
13
225
14
250
16
280
18
305
20
335
22
365
23
390
25
445
29
500
32
10x6
Ak .282
cfm
Throw
115
7.5
140
9.0
170
11
195
12
225
14
255
16
280
18
310
20
340
22
365
23
395
25
450
29
510
33
14x5
Ak .328
cfm
Throw
130
7.5
165
10
195
12
230
14
260
15
295
17
330
20
360
21
395
23
425
25
460
27
525
31
590
35
12x6
Ak .342
cfm
Throw
135
8.0
170
10
205
12
240
14
275
16
310
18
340
20
375
22
410
24
445
26
480
28
545
32
615
36
16x5
Ak .377
cfm
Throw
150
8.5
190
11
225
12
265
15
300
17
340
19
375
21
415
23
450
25
490
27
525
29
605
34
680
38
14x6
Ak .412
cfm
Throw
165
9.0
205
11
245
13
290
16
330
18
370
20
410
22
455
24
495
27
535
28
575
31
660
35
740
40
16x6
Ak .462
cfm
Throw
185
9.0
230
11
275
13
325
15
370
18
415
20
460
22
510
24
555
26
600
28
645
31
740
35
830
39
20x5
Ak .474
cfm
Throw
190
9.5
235
12
285
14
330
16
380
19
425
21
475
23
520
26
570
28
615
30
665
33
760
38
855
42
24x5
Ak .572
cfm
Throw
230
10
285
13
345
15
400
18
460
21
515
23
570
26
630
28
685
33
745
33
800
36
915
41
1030
46
20x6
Ak .581
cfm
Throw
230
10
290
13
350
16
405
18
465
21
525
23
580
26
640
29
695
31
755
34
815
36
930
41
1045
47
24x6
Ak .701
cfm
Throw
280
11
350
14
420
17
490
20
560
23
630
26
700
28
770
31
840
34
910
37
980
40
1120
45
1260
51
20x8
Ak .795
cfm
Throw
320
12
400
15
475
18
555
21
635
24
715
27
795
30
875
33
955
36
1035
39
1115
42
1270
48
1430
54
30x6
Ak .880
cfm
Throw
350
13
440
16
530
19
615
22
705
26
790
29
880
32
970
35
1055
38
1145
41
1230
46
1410
51
1585
57
24x8
Ak .959
cfm
Throw
385
13
480
17
575
20
670
23
765
27
865
30
960
33
1055
37
1150
40
1245
43
1345
47
1535
53
1725
60
30x8
Ak 1.20
cfm
Throw
480
15
600
19
720
22
840
26
960
30
1080
33
1200
37
1320
41
1440
45
1560
48
1680
52
1920
60
2160
67
2400
74
24x10
Ak 1.22
cfm
Throw
490
15
610
19
730
22
855
26
975
30
1100
34
1220
38
1340
41
1465
45
1585
49
1710
53
1950
60
2200
68
2440
75
36x8
Ak 1.45
cfm
Throw
580
16
725
20
870
25
1015
29
1160
33
1305
37
1450
41
1595
45
1740
49
1885
53
2030
57
2320
65
2610
74
2900
82
24x12
Ak 1.47
cfm
Throw
590
17
735
21
880
25
1030
29
1175
33
1325
37
1470
41
1615
45
1765
49
1910
53
2060
58
2350
66
2645
74
2940
82
30x10
Ak 1.53
cfm
Throw
610
17
765
21
920
25
1070
29
1225
34
1375
38
1530
42
1685
46
1835
50
1990
55
2140
59
2450
67
2755
76
3060
84
36x10
Ak 1.84
cfm
Throw
735
18
920
23
1105
28
1290
32
1470
37
1655
42
1840
46
2025
51
2210
55
2390
60
2575
65
2945
74
3310
83
3680
92
30x12
Ak 1.85
cfm
Throw
740
19
925
23
1110
28
1295
32
1400
37
1665
42
1850
46
2035
51
2220
56
2405
60
2590
65
2960
74
3330
83
3700
93
36x12
Ak 2.23
cfm
Throw
890
20
1115
25
1340
31
1560
36
1785
41
2000
46
2230
51
2455
56
2675
61
2900
66
3120
71
3570
81
4015
92
4460
102
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.

Summary of content (2 pages)