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Blauberg ENH 200-1.7-1 S21

Duct heater for supply air reheating.
EAN codeEAN4058448057199
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Compatibility chart
  • Dimensions

The heater is designed for integration into a ventilation system and joint operation with an air handling unit equipped with a control system used to switch on the heater and control its operation. The heater maintains the supply duct air temperature at a point set by the unit controller.Compatible with Ø 125 up to 250 mm air ducts.


The heater design ensures its mounting on the round ducts in any position by means of clamps (included in delivery). The air flow direction shall match the direction of the arrow on the heater casing.In case of horizontal mounting the control box must be installed with the cover upwards. Swivel range from the normal position up to max. 90°. Do not install the control box with the cover downwards.


The casing, the junction box and the heater cover are made of galvanized steel with the heating elements in stainless steel. The heater casing is additionally heat-insulated with 20 mm non-flammable mineral wool layer. The heaters are equipped with rubber seals for airtight connection to the air ducts. The ENH duct heaters are equipped with a power and a signal cable for connection of the heater to the air handling unit controller. The temperature is controlled by a triac power controller by means of switching the full load on and off. Load commutation is carried out by the semiconductor device (triac). The heaters are equipped with overheat thermostats:

  • main overheat protection with automatic reset at +50 °С;
  • emergency overheat protection with manual reset at +90 °С.
Parameter ENH 200-1.7-1 S21 Measurement unit
Current 7.4 A
Power 1700 W
Min. air flow 160 m³/h
Min. air flow 44 l/s
Insulation incombustible mineral wool, 20 mm mm
Casing material galvanized steel -
Air duct for round air ducts -
Connection diameter 200 mm
Capacity diagram
Capacity diagram
  • Selection method:
  • Air capacity:
  • Pressure:
Operating point
  • Air capacity: --
  • Pressure: ---
Documents archieve
Documents archieve
Select a document type
  • Catalogues
  • Technical documentation
  • Certificates
ENH (round) - data sheet (pdf 432.84Kb)
ENH (round) - image (png 273.34Kb)
S21 - user's manual (pdf 611.32Kb)
Modbus table for connecting S21 automation to BMS - user's manual (pdf 137.99Kb)
Designation key
Designation key
Series Connected air duct diameter [mm]   Heater power [kW]   Number of phases Compatibility with automation
ENH 125; 150; 160; 200; 250 0.6; 0.8; 1.2; 1.7; 2.0; 3.0 1: single-phase S21: compatible with S21 automation
Compatibility chart
Compatibility chart
Heater model Unit model
ENH 200 ... S21 KOMFORT with spigot Ø 200 mm and S21 control panel

Model Overall dimensions [mm]
Ø D B H L L1
ENH 200-1.7-1 S21 199 195 337 306 190
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