EHC - Electric Heating Coil Cutsheet.pdf
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- Solicitation number
- 47PB5126R0008
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About this file
This is a product specification document for the Greenheck IDHE Series electric duct heater. The IDHE is the industry's first and only electric duct heater approved by UL for multiple mounting positions, allowing the control cabinet to be installed on either side of a horizontal duct or in any orientation on a vertical duct. The heater features UL 1996 certification, 50/60 Hz compatibility, zero clearance rating, hinged control cabinet cover, power and control terminal boards, automatic reset thermal safety switch, and heavy gauge G60 construction. The absolute maximum capacity is 478.8 kW, with individual maximum capacities dependent on voltage/phase, control type, and heater dimensions.
Standard construction specifications include universal airflow direction, magnetic contactor, universal control box offset, 24 Vac control voltage, standard 80/20 element wire, SCR or Vernier SCR heater control stages, slip-in or flange heater types, galvanized steel material, and unfused control transformer. Optional features include airflow switches, disconnect switches with door interlock, duct thermostats, dust-tight boxes, fan interlock, pilot lights, power fusing (required at 48 amps or larger), recesses for insulated ducts, room thermostats, stainless steel hardware, time delay relays, and vapor barriers. Available voltage/phase options are 120/1 (standard) and 208/1, 208/3, 240/1, 240/3, 277/1, 480/1, and 480/3 (optional). Size limitations range from 8 x 8 inches minimum to 120 x 144 inches maximum (consulting factory required for heights exceeding 90 inches). Air flow requirements specify a maximum inlet air temperature of 110°F and maximum heater capacity of 30 kW per square foot of duct cross section, with minimum air velocity determined by provided charts correlating inlet air temperature and CFM to kW minimum.
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Text version
The IDHE series is the industry’s first and only electric duct heater approved by UL for multiple mounting positions. This allows the control cabinet to be installed on either side of a horizontal duct or in any orientation on a vertical duct. The control cabinet is offset from the heating elements similar to traditional heaters.
However, the IDHE affords the installer the flexibility to position the offset on the left or right as preferred.
The IDHE has the following standard features:
| • UL 1996 certified |
| • 50/60 Hz compatibility |
| • Zero clearance rating |
| • Hinged control cabinet cover |
| • Power and control terminal boards |
| • Automatic reset thermal safety switch for |
| primary over temperature protection |
| • Heavy gauge G60 construction |
Individual maximum capacities are dependent on voltage/phase, control type, and heater dimensions.
Absolute maximum capacity: 478.8 kW
* The Greenheck model IDHE duct heater is universally configured to allow airflow in either direction in all mounting orientations.
Options available:
• Airflow switch (adjustable or fixed set point)
• Disconnect switch with door interlock
• Duct thermostat (available with SCR control)
• Dust tight box with gasketed door
• Fan interlock
• Pilot light
• Power fusing required when 48 amps or larger
• Recess for internally insulated ducts
• Room thermostat
• Stainless steel hardware
• Time delay relay - delay heater or delay stages
• Vapor barrier
* �Vernier SCR is required in heaters greater than 48 amps to comply with NEC requirements.
** �Slip in heaters are 1⁄8 in. (3 mm) undersized for the width and 1⁄4 in.
(6 mm) undersized for the height.
W x H Minimum Size Maximum Size
Inches 8 x 8 120 x 144* mm 203 x 203 3048 x 3658
* Consult factory for heights larger than 90 in. ( 2286mm)
Size Limitations
Standard Optional
Airflow Direction Universal -
Contactor Magnetic -
Control Box Offset Universal -
Control Voltage 24 Vac -
Element Wire Standard 80/20
Heater Control Stage SCR, Vernier SCR*
Heater Type Slip in** Flange
Heater Voltage/ Phase
120/1 208/1, 208/3, 240/1, 240/3, 277/1, 480/1, 480/3
Material Galvanized Steel -
Recess (in.) None 1, 2, 3
Control Transformer
Unfused Fused, None
Deration (kW) None .035, .025
Construction
IDHE
Duct Heater
Application
IDHE October 2025
IDHE: Air Flow Requirements Minimum Air Velocity: See charts below
Maximum Inlet Air Temp: 110°F
Maximum Heater KW: 30 KW per Square Foot of Duct Cross Section
IDHE October 2025
Document Links
TRIFOLDINSTALLATION
SPECIFICATIONS
SELECTION GUIDE
WARRANTY
IDHE
Duct Heater
Copyright ® 2025 Greenheck Fan Corporation
IDHE, R11, October 2025
Greenheck Fan Corporation reserves the right to make product changes without notice https://content.greenheck.com/public/DAMProd/Original/10011/DuctHeater_quadfold.pdf https://content.greenheck.com/public/DAMProd/Original/10001/478052ductheaters_iom.pdf https://content.greenheck.com/public/DAMProd/Original/10010/IDHBIDHE_spec.rtf https://content.greenheck.com/public/DAMProd/Original/10002/InteractiveDamperSelectionGuide.pdf https://content.greenheck.com/public/DAMProd/Original/10002/ductheater_warranty.pdf
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