Temp-O-Matic TMP-105 Manual page 9

3 Connect supply and return ducts
Duct sizing
(continued)
Table 4 Typical duct sizing for systems not over 100 feet equivalent length – round or rectangular galvanized
(For approximately 0.10 inch w.c. in a typical residential installation of galvanized metal duct)
Rectangular duct equivalent sizes
Round
Minimum width (inches) for duct heights (inches) of :
duct
CFM
diameter 4
(inches) x
45 4 4
65 5 6
100 8
6
150 12
7
200 8 14
250 9 18
300 20
9
400 26
10
500 12 32
600 12 38
700 12 46
800 52
14
900 58
14
1000 16 64
1100 16 72
1200 -
16
1300 -
16
1400 18 -
1500 18 -
1600 -
18
1700 -
18
1800 -
18
1900 20 -
2000 20 -
2200 -
20
2400 -
22
2600 22 -
2800 22 -
3000 -
22
3500 -
24
4000 26 -
Do not apply this table for duct systems over approximately 100 equivalent feet in length. For longer systems or systems
using other duct materials, refer to ACCA Manual D. Incorrectly sizing duct systems can result in unsafe or uncomfortable
operation.
670-000-004/1010
Typical duct sizing
5 6 7 8 9
x x x x x
4 4 - - -
5 4 4 - -
6 5 5 4 4
9 7 6 5 5
11 9 8 7 6
13 10 9 8 7
15 12 10 9 8
19 15 13 11 10
23 18 15 13 12
28 22 18 15 13
32 25 20 17 15
36 28 23 19 17
41 31 25 21 19
45 34 28 23 20
49 38 30 25 22
54 41 33 27 24
58 44 35 29 25
63 47 38 31 27
68 51 40 34 29
72 54 43 36 30
- 58 45 38 32
- 61 48 40 34
- 64 51 42 35
- 68 53 44 37
- - 59 48 41
- - 64 52 44
- - 69 56 47
- - - 61 51
- - - 65 54
- - - - 63
- - - - 72
TMP
(continued)
10 12 14 16 18
x x x x x
- - - - -
- - - - -
- - - - -
5 4 4 - -
6 5 4 4 -
6 6 5 5 4
7 6 6 5 5
9 8 7 6 6
11 9 8 7 6
12 10 9 8 7
14 11 10 9 8
15 13 11 10 9
17 14 12 11 10
18 15 13 11 10
19 16 14 12 11
21 17 15 13 12
22 18 16 14 12
24 19 16 14 13
25 20 17 15 14
27 21 18 16 14
28 23 19 17 15
29 24 20 17 16
31 25 21 18 16
32 26 22 19 17
35 28 23 20 18
38 30 25 22 19
41 32 27 23 21
44 34 29 25 22
47 37 30 26 23
54 42 34 29 26
61 47 39 33 29
– Furnace Manual
Oil Furnaces
20 22 24 26
x x x x
- - - -
- - - -
- - - -
- - - -
- - - -
4 - - -
4 4 - -
5 5 5 4
6 6 5 5
7 6 6 6
7 7 7 6
8 8 7 7
9 8 8 7
9 9 8 8
10 9 9 8
11 10 9 9
11 10 10 9
12 11 10 10
12 12 11 10
13 12 11 11
14 13 12 11
14 13 12 11
15 14 13 12
15 14 13 12
16 15 14 13
17 16 15 14
19 17 16 15
20 18 17 15
21 19 17 16
23 21 19 18
26 23 21 20
28 30
x x
- -
- -
- -
- -
- -
- -
- -
4 -
5 5
5 5
6 6
6 6
7 7
7 7
8 7
8 8
9 8
9 9
10 9
10 9
10 10
11 10
11 11
12 11
12 12
13 12
14 13
15 14
15 14
17 16
19 18
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