HD110301-1 Rev2
Page 15 of 23
Table 1 cont.
WATTS PER FOOT PIPE REQUIRED
Pipe Dia.
Ambient Temp.
Insulation Thickness
Inch
°F
°C
½"
1"
1 ½"
2"
2 ½"
3"
4"
6
0
-18
11.0
6.0
4.6
3.4
2.8
2.5
2.0
-10
-23
13.5
7.4
5.3
4.2
3.5
3.1
2.5
-20
-29
16.0
8.8
6.3
5.0
4.2
3.7
3.0
-40
-40
21.1
11.6
8.2
6.5
5.5
4.8
3.9
8
0
-18
14.0
7.5
5.3
4.2
3.5
3.0
2.4
-10
-23
17.2
9.3
6.6
5.2
4.3
3.8
3.0
-20
-29
20.5
11.0
7.8
6.2
5.2
4.5
3.6
-40
-40
27.0
14.6
10.3
8.1
6.8
5.9
4.7
10
0
-18
17.0
9.2
6.4
5.0
4.2
4.0
3.0
-10
-23
21.0
11.4
8.0
6.2
5.2
5.0
4.0
-20
-29
26.0
13.6
10.0
7.4
6.2
5.3
4.2
-40
-40
34.0
18.0
13.0
10.0
8.1
7.0
6.0
12
0
-18
20.0
11.0
8.0
6.0
5.0
4.2
3.3
-10
-23
25.0
13.3
9.3
7.2
6.0
5.1
4.1
-20
-29
30.0
16.0
11.0
9.0
7.0
6.1
5.0
-40
-40
39.0
21.0
15.0
11.3
9.3
8.0
6.4
14
0
-18
22.0
12.0
8.0
6.3
5.2
5.0
4.0
-10
-23
27.2
15.0
10.0
8.0
7.0
6.0
4.4
-20
-29
33.0
17.3
12.0
9.3
8.0
7.0
5.2
-40
-40
43.0
23.0
16.0
12.2
10.1
9.0
7.0
16
0
-18
25.0
13.2
9.2
7.1
6.0
5.0
4.0
-10
-23
31.0
17.0
11.4
9.0
7.3
6.2
5.0
-20
-29
37.0
20.0
14.0
11.0
9.0
7.4
6.0
-40
-40
48.5
26.0
18.0
14.0
11.3
10.0
8.0
18
0
-18
28.0
15.0
10.2
8.0
7.0
6.0
4.3
-10
-23
35.0
19.0
13.0
10.0
8.0
7.0
5.4
-20
-29
42.0
22.0
15.0
12.0
10.0
8.2
6.4
-40
-40
54.3
29.0
20.0
15.3
13.0
11.0
8.4
20
0
-18
31.0
17.0
11.3
9.0
7.0
6.1
5.0
-10
-23
38.0
21.0
14.0
11.0
9.0
8.0
6.0
-20
-29
46.0
24.0
17.0
13.0
11.0
9.0
7.0
-40
-40
60.2
32.0
22.0
17.0
14.0
12.0
9.2
24
0
-18
37.0
20.0
14.0
11.0
9.0
7.1
6.0
-10
-23
46.0
24.0
17.0
13.0
11.0
9.0
7.0
-20
-29
55.0
29.0
20.0
15.0
13.0
11.0
8.0
-40
-40
72.0
38.0
26.0
20.0
16.3
14.0
11.0
