Electric duct heaters ERH NI/NV/NIS HAVACO

HAVACO's ERH NI/NV/NIS is a series of electric duct heaters with a built-in automation system that includes a heater power regulator. The regulation takes place on the basis of pulsation. The time between switching on and off the heaters is adjusted by the regulator so as to ensure that the set temperature value is maintained.

NV/NI/NIS series differ in the way the target value is set:

  • - NI - Temperature setting by means of a potentiometer located on the heater housing.
  • - NV - Temperature setting by means of an external HR5K referencing device.
  • - NIS - Temperature setting using an external 0-10V control signal.


ERH heaters are adapted for installation in rectangular ducts. Heating power range: from 6.0 to 66.0 kW. Each heater has a two-stage overheating protection:

  • - I stage at 50°C - automatic reset.
  • - II stage at 100°C - manual reset required.

  • Variants & availability
  • Catalogue card
  • Downloads

Product name

Diameter [mm]

Heating power [kW]

Power supply [V]

Availability

Product name

Electric duct heaters ERH-NI-5025/150/3F

Diameter [mm]

500x250

Heating power [kW]

15,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NI-5030/180/3F

Diameter [mm]

500x300

Heating power [kW]

18,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NI-6030/180/3F

Diameter [mm]

600x300

Heating power [kW]

18,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NI-7040/510/3F

Diameter [mm]

700x400

Heating power [kW]

51,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-10050/360/3F

Diameter [mm]

1000x500

Heating power [kW]

36,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-10050/450/3F

Diameter [mm]

1000x500

Heating power [kW]

45,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-10050/90/3F

Diameter [mm]

1000x500

Heating power [kW]

9,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-4020/60/3F

Diameter [mm]

400x200

Heating power [kW]

6,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-5025/60/3F

Diameter [mm]

500x250

Heating power [kW]

6,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-5030/180/3F

Diameter [mm]

500x300

Heating power [kW]

18,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-5030/270/3F

Diameter [mm]

500x300

Heating power [kW]

27,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-5030/90/3F

Diameter [mm]

500x300

Heating power [kW]

9,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-6030/120/3F

Diameter [mm]

600x300

Heating power [kW]

12,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-6030/90/3F

Diameter [mm]

600x300

Heating power [kW]

9,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-6035/180/3F

Diameter [mm]

600x350

Heating power [kW]

18,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-6035/210/3F

Diameter [mm]

600x350

Heating power [kW]

21,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-6035/270/3F

Diameter [mm]

600x350

Heating power [kW]

27,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-7040/180/3F

Diameter [mm]

700x400

Heating power [kW]

18,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-7040/90/3F

Diameter [mm]

700x400

Heating power [kW]

9,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-8050/240/3F

Diameter [mm]

800x500

Heating power [kW]

24,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NIS-8050/360/3F

Diameter [mm]

800x500

Heating power [kW]

36,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NV-6035/270/3F

Diameter [mm]

600x350

Heating power [kW]

27,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NV-7040/510/3F

Diameter [mm]

700x400

Heating power [kW]

51,0

Power supply [V]

3x400

Availability

Product name

Electric duct heaters ERH-NV-7040/90/3F

Diameter [mm]

700x400

Heating power [kW]

9,0

Power supply [V]

3x400

Availability

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Electric heaters ERH NV NI NIS HAVACO catalogue card