Page 1
Enclosure Heaters
Silicone Rubber Enclosure Heaters
EHR Series
Built-in
air sensing
thermostat
Design Features
l Available with or without an Integrated Thermostat
(See EHA below for Remote Thermostats)
l Custom Design and Alternate Thermostat
Settings Available
l Heater Vulcanized to an Aluminum Mounting Plate
for Easy Installation
l 120V Standard; Custom Voltages Available
upon Request
l 1.2 m (48") PTFE Leads Standard
l Safe to Operate, No Exposed Electrical Connections
l 13 mm (
1
⁄2") Mounting Flange
Determining the Minimum Wattage for Your Application
1. Determine the lowest temperature to which the enclosure
is expected to be exposed
2. Determine the operating temperature to which you want
the enclosure heated
3. Subtract the ambient temperature from the enclosure
temperature to get the temperature change required
4. Calculate the surface area of the enclosure; For a
rectangular enclosure use the formula: 2 [(Length × Width)
+ (Length × Height) + (Width × Height)]
5. Select the correct table below depending upon whether
your box is insulated or non-insulated; Read from
the table the wattage required depending upon your
calculated temperature change and surface area
6. Add an additional 50% of the determined wattage if the
enclosure is to be located in windy conditions
Insulated Enclosure Wattage Selection Table
Δ Temperature
°C (°F)
11 (20) 10 10 15 20 20 25 30 35 50 65 80 100 130 160
22 (40) 15 20 30 35 40 50 60 65 100 130 160 195 260 320
33 (60) 20 30 45 50 60 75 90 100 145 195 240 290 385 480
44 (80) 30 40 55 65 80 100 115 130 195 260 320 320 515 640
56 (100) 35 50 65 80 100 125 145 160 240 320 400 400 640 800
67 (120) 40 60 80 100 115 150 175 195 290 385 480 480 770 960
78 (140) 45 70 90 115 135 175 205 225 340 450 560 560 900 1120
0.19
(2)
0.28
(3)
0.37
(4)
0.47
(5)
0.56
(6)
EHR Series silicone rubber heaters are designed for easy
installation and safe operation. These rectangular shaped
wire-wound silicone rubber heaters are vulcanized to an
aluminum mounting plate with mounting holes. They provide
superior protection for enclosures of all types against
condensation, humidity and freezing.
It is recommended that the enclosure heater be used with
a thermostat either built in or mounted remotely to limit the
maximum temperature reached and conserve energy. The
suggested mounting method is at the bottom of the enclosure,
mounted vertically. If a remote mounted thermostat is
preferred, mount the heater on the bottom of the enclosure
and the thermostat in the middle of the enclosure.
Selecting the Right Heater for Your Application
1. Determine the wattage of heater(s) that you need. See
the instructions on this page to determine your wattage
requirements.
2. Determine the type of heater that you need. Depending upon
conditions, one heater type might be better than others. Items
to take into consideration are space constraints inside the
enclosure and wattages required.
3. Determine the number of heaters you need. You can combine
multiple heaters to achieve your wattage requirements.
4. Determine how you will control the heaters. Will you use builtin thermostats to monitor the temperature? Or will you use a
single temperature control to monitor and control the heaters?
OMEGA manufactures a wide range of temperature control
devices.
0.93
(10)
2
(ft2)
1.40
(15)
1.86
(20)
2.33
(25)
2.79
(30)
Total Surface Area m
0.70
(7.5)
0.84
(9)
3.72
(40)
4.65
(50)
Uninsulated Enclosure Wattage Selection Table
0.93
(10)
2
(ft2)
1.40
(15)
1.86
(20)
2.33
(25)
2.79
(30)
3.72
(40)
Δ Temperature
°C (°F)
11 (20) 30 40 55 70 80 100 120 135 205 270 335 405 540 670
22 (40) 55 80 110 135 160 200 245 270 405 540 670 805 1075 1340
33 (60) 90 120 160 205 245 300 365 405 605 805 1005 1210 1610 2010
44 (80) 110 160 215 270 325 400 485 540 805 1075 1340 1610 2145 2680
56 (100) 135 200 270 335 405 500 605 670 1005 1340 1675 2010 2680 3350
67 (120) 165 240 320 405 485 600 725 805 1210 1610 2010 2415 3220 4020
78 (140) 190 280 375 470 565 700 845 940 1410 1880 2345 2815 3775 4690
0.19
(2)
0.28
(3)
0.37
(4)
0.47
(5)
Total Surface Area m
0.56
(6)
0.70
(7.5)
0.84
(9)
To order, call 1-800-826-6342 or shop online at omega.com
SM
4.65
(50)
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Enclosure Heaters
Silicone Rubber Enclosure Heaters (Continued)
To Order Visit omega.com/ehr_eha_series for Pricing and Details
Model No.
EHR00001
EHR00002
EHR00003
EHR00037
EHR00039
EHR00004
EHR00005
EHR00048
EHR00006
EHR00007
EHR00008
EHR00009
EHR00010
EHR00047
EHR00049
EHR00035
EHR00011
EHR00012
EHR00028
EHR00032
EHR00013
EHR00014
EHR00015
EHR00016
EHR00034
EHR00017
EHR00018
EHR00019
EHR00044
Note: Dimensions listed are for heater and bracket; actual heater width is 12.7 mm (1⁄2") less.
Note: Mounting slot size is 6 x 4 mm (1⁄4 x 5⁄32").
mm (inch)
64 (21⁄2) 127 (5) 3 25 120 1.2 (48) — —
64 (21⁄2) 127 (5) 3 25 120 1.2 (48) 16 (60) 4 (40)
64 (21⁄2) 127 (5) 3 35 120 1.2 (48) — —
64 (21⁄2) 127 (5) 3 50 12 1.2 (48) 16 (60) 4 (40)
64 (21⁄2) 127 (5) 3 50 24 1.2 (48) — —
1
⁄2) 127 (5) 3 50 120 1.2 (48) — —
64 (2
64 (21⁄2) 127 (5) 3 50 120 1.2 (48) 16 (60) 4 (40)
64 (21⁄2) 152 (6) 4 60 24 1.2 (48) 60 (140) 43 (110)
64 (21⁄2) 152 (6) 4 60 120 1.2 (48) — —
64 (21⁄2) 152 (6) 4 60 120 1.2 (48) 16 (60) 4 (40)
1
⁄2) 152 (6) 4 60 120 1.2 (48) 60 (140) 43 (110)
64 (2
64 (21⁄2) 152 (6) 4 60 120 1.2 (48) 82 (180) 66 (150)
64 (21⁄2) 254 (10) 7 70 120 1.2 (48) — —
1
⁄2) 254 (10) 7 100 12 1.2 (48) 16 (60) 4 (40)
64 (2
64 (21⁄2) 254 (10) 7 100 12 1.2 (48) — —
1
⁄2) 254 (10) 7 100 24 1.2 (48) 16 (60) 4 (40)
64 (2
64 (21⁄2) 254 (10) 7 100 120 1.2 (48) — —
1
⁄2) 254 (10) 7 100 120 1.2 (48) 16 (60) 4 (40)
64 (2
64 (21⁄2) 254 (10) 7 100 230 1.2 (48) 16 (60) 4 (40)
1
⁄2) 305 (12) 9 80 240 1.2 (48) 16 (60) 4 (40)
64 (2
1
⁄2) 305 (12) 9 120 120 1.2 (48) — —
64 (2
64 (21⁄2) 305 (12) 9 120 120 1.2 (48) 16 (60) 4 (40)
1
⁄2) 305 (12) 9 120 120 1.2 (48) 60 (140) 43 (110)
64 (2
64 (21⁄2) 305 (12) 9 120 120 1.2 (48) 82 (180) 66 (150)
1
⁄2) 305 (12) 9 120 240 1.2 (48) 16 (60) 4 (40)
64 (2
114 (41⁄2) 254 (10) 7 140 120 1.2 (48) — —
1
⁄2) 254 (10) 7 250 120 1.2 (48) — —
114 (4
114 (41⁄2) 254 (10) 7 250 120 1.2 (48) 16 (60) 4 (40)
1
⁄2) 254 (10) 7 250 240 1.2 (48) 60 (140) 43 (110)
114 (4
Width
Length
mm (inch)
Mounting
Center Watts Volts
Length
m (inch)
Lead
Thermostat °C (°F)
Opens Closes
Remote Thermostats for Enclosure Heaters
EHA Series
Design Features
l Standard PTFE Lead Length: 1.2 m (48")
l Can Easily be Located Anywhere in the Enclosure
Using the Pressure Sensitive Adhesive
l Any Standard Thermostat can be Used
l Silicone Rubber Base and Enclosure
l Ratings: 10A/250 Vac, 15A/120 Vac
Ordering Information
Select a remote thermostat from the list to the right
Custom engineered/manufactured heaters available
consult OMEGA.
Please specify the following:
l Range: Select from the list of thermostats at omega.com
l Lead Length: Specify any special lead length you require
2
To order, call 1-800-826-6342 or shop online at omega.com
Pressure Sensitive Adhesive
for easy mounting
16 mm
0.625"
38 mm
1.5"
To Order Visit omega.com/ehr_eha_
EHA00001 EHA00005
EHA00002 —
EHA00003 —
EHA00005 D-ring and strap
mounting thermostat. Can be
applied to sense the air around an
object or an object directly.
51 mm
2.0"
series for Pricing and Details
Model Number
Opens °F Closes °FPSA D-ring and Strap
60±5 40±7
140±5 110±10
180±5 150±10
SM
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