Series DH Tubular Air Duct Heaters

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.)

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Standard 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 1⁄2” high temp. insulation below flange

1⁄4” or 3⁄8” 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

Recommended Operating Conditions
Air Speed
(ft. per second)
Maximum
Operating Temp.
4
1000°F
9
1100°F
16
1200°F

Volts 3-Phase

Volts
3-Phase
#
Circuits
KW
A
B
C
D
E
G
Wt.
(lbs.)
#
Elems.
Catalog #
240
480
1
1
6
27 3⁄4
20
3 5⁄8
5 5⁄8
10
2 1⁄2
25
6
DH6-6-3
DH6-6-5
240
480
1
1
12
27 3⁄4
20
5 5⁄8
7 5⁄8
10
3 1⁄2
35
12
DH12-12-3
DH12-12-5
240
480
1
1
18
27 3⁄4
20
7 5⁄8
9 5⁄8
12
3
45
18
DH18-18-3
DH18-18-5
240
480
2
2
24
27 3⁄4
20
9 5⁄8
11 5⁄8
14
2 3⁄4
55
24
DH24-24-3
DH24-24-5
240
480
2
1
30
27 3⁄4
20
11 5⁄8
13 5⁄8
14
3 1⁄4
65
30
DH30-30-3
DH30-30-5
240
480
2
1
36
27 3⁄4
20
13 5⁄8
15 5⁄8
14
3 3⁄4
75
36
DH36-36-3
DH36-36-5
240
480
2
1
42
27 3⁄4
20
15 5⁄8
17 5⁄8
14
4 1⁄4
85
42
DH42-42-3
DH42-42-5
240
480
4
2
48
27 3⁄4
20
17 5⁄8
19 5⁄8
14
4 3⁄4
100
48
DH48-48-3
DH48-48-5
240
480
3
3
54
27 3⁄4
20
19 5⁄8
21 5⁄8
14
5 1⁄4
110
54
DH54-54-3
DH54-54-5
240
480
5
2
60
27 3⁄4
20
21 5⁄8
23 5⁄8
14
5 3⁄4
120
60
DH60-60-3
DH60-60-5
240
480
2
2
75
32 3⁄4
25
21 5⁄8
23 5⁄8
14
5 3⁄4
135
60
DH60-75-3
DH60-75-5
240
480
5
4
100
40 1⁄4
32 1⁄2
21 5⁄8
23 5⁄8
14
5 3⁄4
160
60
DH60-100-3
DH60-100-5
240
480
5
5
125
49 1⁄4
41 1⁄2
21 5⁄8
23 5⁄8
14
5 3⁄4
185
60
DH60-125-3
DH60-125-5
240
480
6
4
150
49 1⁄4
41 1⁄2
25 5⁄8
27 5⁄8
18
4 1⁄2
220
72
DH72-150-3
DH72-150-5
240
480
8
8
200
49 1⁄4
41 1⁄2
33 5⁄8
35 5⁄8
22
4 3⁄8
260
96
DH96-200-3
DH96-200-5
240
480
10
8
250
49 1⁄4
41 1⁄2
41 5⁄8
43 5⁄8
22
5 3⁄8
325
120
DH120-250-3
DH120-250-5

Brochures

Closed Tank Heating

Watt Density

Percentage of Wattage

Looking for a
heating solution?

Discuss your project in detail with one of our Application Engineers and they will provide a heating solution perfectly suited to the needs of your application, as well as your budget. Contact us today!

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