A comprehensive risk and hazard analysis forms the basis for effective explosion control measures.

WOLF air handling units with ATEX certificate to Directive 2014/34/EU guarantee protection from various ignition source types, such as static electricity, impermissible surface heating, mechanical sparks, flames, hot gases, lightning strike and adiabatic compression. WOLF air handling units are ideal for safe use in areas at risk of explosion.

The ATEX directive obliges manufacturers to conduct a comprehensive risk analysis for the appliance, to define a specific application field and to have conformance verified independently. TÜV SÜD confirms that WOLF appliances and components comply with Directive 2014/34/EU for their intended use in areas at risk of explosion in safety categories (2G and 3G), temperature classes (T1 to T4) or zones of use (1 and 2).

In parallel to ATEX Directive 2014/34/EU for the installer, ATEX Directive 1999/92/EC (ATEX 137) describes minimum requirements for the user, which must also be considered during planning. Compliance with both directives has been prescribed by law in all member states of the European Union since 1 July 2003.

Special features of WOLF air handling units, ATEX versions:

  • All casing components and fitted parts are electrically conductive and equipped with equipotential bonding
  • ATEX-certified air filters with conductive filter medium in conductive filter mounting frame
  • Fans with ATEX certification according to classification
  • All components (coils, silencers, louvre dampers, heat recovery, etc.) are electrically conductive and earthed
  • No materials are used that enable sparks or electrostatic charges All fitted parts also in ATEX-compliant design

A checklist specially developed by WOLF makes it easier for design engineers, operators and installers to classify air handling units according to the directives.