Series DH Tubular Air Duct Heaters feature Incoloy® 840 elements, stainless steel element support, stainless steel support rods, 3-1/2″ high temperature insulation below flange, NEMA 1 terminal enclosure, and replaceable element design.

High temperature (1200°F max.)

Features:

  • 20 watts per sq. inch on sheath
  • Incoloy 840 elements – 1700°F max. sheath temperature
  • Stainless steel element support
  • Stainless steel support rods
  • 3 12” high temp. insulation below flange
  • 14” or 38” thick painted steel flange
  • Nichrome A resistance wire sized for low wire watt density
  • Recompacted bends
  • Replaceable element design
  • NEMA 1 terminal enclosure
Recommended Operating Conditions
Air Speed
(ft. per second)
Maximum
Operating Temp.
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16
1200°F
Air Duct DH Series Tubular Heater
Volts
3-Phase
#
Circuits
KW
A
B
C
D
E
G
Wt.
(lbs.)
#
Elems.
Catalog #
240
480
1
1
6
27 34
20
3 58
5 58
10
2 12
25
6
DH6-6-3
DH6-6-5
240
480
1
1
12
27 34
20
5 58
7 58
10
3 12
35
12
DH12-12-3
DH12-12-5
240
480
1
1
18
27 34
20
7 58
9 58
12
3
45
18
DH18-18-3
DH18-18-5
240
480
2
2
24
27 34
20
9 58
11 58
14
2 34
55
24
DH24-24-3
DH24-24-5
240
480
2
1
30
27 34
20
11 58
13 58
14
3 14
65
30
DH30-30-3
DH30-30-5
240
480
2
1
36
27 34
20
13 58
15 58
14
3 34
75
36
DH36-36-3
DH36-36-5
240
480
2
1
42
27 34
20
15 58
17 58
14
4 14
85
42
DH42-42-3
DH42-42-5
240
480
4
2
48
27 34
20
17 58
19 58
14
4 34
100
48
DH48-48-3
DH48-48-5
240
480
3
3
54
27 34
20
19 58
21 58
14
5 14
110
54
DH54-54-3
DH54-54-5
240
480
5
2
60
27 34
20
21 58
23 58
14
5 34
120
60
DH60-60-3
DH60-60-5
240
480
2
2
75
32 34
25
21 58
23 58
14
5 34
135
60
DH60-75-3
DH60-75-5
240
480
5
4
100
40 14
32 12
21 58
23 58
14
5 34
160
60
DH60-100-3
DH60-100-5
240
480
5
5
125
49 14
41 12
21 58
23 58
14
5 34
185
60
DH60-125-3
DH60-125-5
240
480
6
4
150
49 14
41 12
25 58
27 58
18
4 12
220
72
DH72-150-3
DH72-150-5
240
480
8
8
200
49 14
41 12
33 58
35 58
22
4 38
260
96
DH96-200-3
DH96-200-5
240
480
10
8
250
49 14
41 12
41 58
43 58
22
5 38
325
120
DH120-250-3
DH120-250-5