Air warmer type HEF


Product inquiry

Click on the following button to get a contact form.

Product inquiry

ATEX / IECEx II 2 G Ex e II T4 Gb Zone 1 & 2

The HEF is self-regulating, automatically adjusting its output to match ambient temperatures. Coupled with its compact design, this makes the HEF ideal for anticondensation, frost protection and temperature control for all instrumentation and switch gear applications. The HEF range is certified for use in hazardous areas where the atmosphere is classified as a Zone 1 or 2 (IIC) gas group.

Features for air warmer type HEF

  • Certified and declared in accordance with ATEX directive 2014/34/EU
  • Certified to CSA (Divisions and Zones) for North America markets.
  • Compact, low profile, 316 stainless steel case, requires minimal space
  • Self-regulating for ambient temperatures from -60 °C (-55 °C for CSA certified models only) to +80 °C
  • Mounting of the heater can be in any orientation
  • Design allows for closer installation proximity to internal components and cables (minimum distance 100 mm away)

OhmEx - Your partner for industrial heaters

Contact now

OhmEx Industrielle Elektrowärme GmbH
Industriering 7
DE – 63868 Großwallstadt
Phone: +49 6022 / 26 12 00
Fax: +49 60 22 / 26 12 02

How to find us

Quality & Certificates

The OhmEx company regularly gets itself certified externally - so we keep our quality consistently high!
Currently we are certified according to
IQNet ISO 9001: 2015
and ISO 9001: 2015.
Download the certificate ISO 9001:2015 here:
ISO 9001-2015 Certificate
Download the certificate IQNet ISO 9001:2015 here:
IQNet ISO 9001-2015 Certificate

Your direct contact

You are also welcome to contact our sales department directly:

Matthias Volz
Tel.: +49 6022 / 26 12 01