CSN® air heater type 804

The industrial air heater type 804 is used to heat gaseous media. These screw-fitted heaters with integrated connection box can be used at overpressures of up to 10 mbar.


The industrial air heater type 804 is designed for direct air heating and is typically used in heating, ventilation, air conditioning and drying technology. These robust duct air heaters are ideal for environments with operating temperatures of up to 100°C.

Product advantages

  • Lightweight design, non-drilled flange frame connection
  • Replaceable, highly compressed tubular heating elements.
  • Precise temperature monitoring and control possible using electronic controls.
  • In contrast to combustion heaters, no combustion fumes or noise.

Technical data


Air and gaseous

Process data

Medium and temperature (up to 100°C) according to specification

Process connection

Flange frame, undrilled according to duct size

Heating elements

Tubular heating elements


Housing: Painted steel, 1.4301 (AISI 304)

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

Duct cross-section (mm x mm)

(250 x 250) to (2000 x 2000)

Temperature monitoring

Temperature controller

Safety temperature limiter


PT100 or thermocouple


3.6 to 500 kW


110 to 690 V

Protection class


Terminal box

Stainless steel

Customised versions on request

The following certifications are available on request:

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