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Blauberg EVH 200-1.2-1 S21 V.2

Electric duct preheater for heat exchanger freeze protection.
  • Description
  • Characteristics
  • Capacity diagram
  • Downloads
  • Designation key
  • Compatibility chart
  • Dimensions

Heat exchanger freeze protection by means of preheating of the intake air. Maintains the duct air temperature at a point that prevents the heat exchanger freezing. Compatible with Ø 125 up to 315 mm air ducts.


Equipped with a power cable. The signal cable for connection to the controller of the air handling unit. Equipped with a triac power regulator.Regulation is carried out via switching-on and switching-off the full load. Load commutation is carried out by the semiconductor device (triac). The switching unit has no wearing mechanical elements. Equipped with overheat thermostats:

  • main protection with automatic restart at +60 °С;
  • emergency protection with manual restart at +90 °С.

The casing is internally filled with 20 mm layer of non-flammable mineral wool. The casing and the junction box are made of galvanized steel. Heating elements are made of stainless steel. Airtight connection to air ducts due to rubber seals.


Fixation to round air ducts by means of clamp (included in the delivery). The heater is controlled by the air handling unit through the cable supplied and connected to the heater at the factory.In case of horizontal mounting position the control box cover must be directed upwards only. Permitted deviation up to 90°. The control box cover may not be positioned downwards!

Parameter EVH 200-1.2-1 S21 V.2 Measurement unit
Current 5.2 A
Power 1200 W
Min. air flow 150 m³/h
Min. air flow 42 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
S21 - user's manual (pdf 611.32Kb)
EVH S21 V.2 - image (png 574.82Kb)
EVH S21 V.2 / ENH S21 V.2 - user's manual (pdf 1.5Mb)
EVH S21 V.2 - data sheet (pdf 439.58Kb)
Designation key
Designation key
Series Connected air duct diameter [mm]   Heater power [kW]   Number of phases Compatibility with automation
EVH 125; 150; 160; 200; 250; 315 0.6; 0.8; 1.2; 1.7; 2.0; 3.0 1: single-phase S21 V.2: compatible with an S21 automation without a DB-9M connector
Compatibility chart
Compatibility chart
Heater model Unit model
EVH 200 S21 V.2 KOMFORT EC SB unit with a ∅ 200 pipe and an S21 automation without a DB-9M connector

Model Overall dimensions [mm]
Ø D B H L L1
EVH 200-1.2-1 S21 V.2 200 239 336 306 192
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