CSN® air heater type 850

The electric industrial air heater type 850 is specially designed for use in round ducts in process engineering.


The industrial air heater type 850 is a first-class solution for the direct heating of gaseous, non-flammable media in industrial environments. Developed for outstanding performance and reliability, this electric air heater is widely used in process and process engineering systems. With its welded design, solutions for use at overpressures of up to 3 bar have already been realised.

Product advantages

  • For connection to round flow ducts
  • Welded housing
  • With integrated fan on request
  • Precise temperature monitoring and control possible with the aid of electronic controls
  • In contrast to combustion heaters, no combustion fumes or noise.

Technical data



Process data

Medium and temperature up to 400°C

Heating elements

Tubular heating elements


Housing: Painted steel; 1.4301 (AISI 304); 1.4571 (AISI 316 Ti)

Tubular heating element: 1.4571 (AISI 316 Ti); 1.4828 (AISI 309)

Duct connection diameter (mm)

Ø100 to Ø1400

Temperature monitoring

Temperature controller

Safety temperature limiter


PT100 or thermocouple


4 to 1000 kW


110 to 690 V

Protection class

IP54 to IP66

Terminal box

Powder-coated steel RAL 7035, stainless steel

Customised versions on request

The following certifications are available on request:

Your contact persons

Your request

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