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Heightec DUON-Air Vented Height Safety Helmet


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DUON Air™ vented height safety helmet is a high specification helmet with dual certification, meeting both industrial and climbing standards

Heightec DUON Safety Helmet have a unique chinstrap buckle (see below) which can be switched between ‘strong’ and ‘weak’ to give conformity with either standard, allowing wearers to be fully compliant in complex environments containing different, changing hazards

DUON is the only helmet that has full compliance with two European standards, EN 397 and EN 12492, having a special chin strap buckle with a variable fastening power and variable venting

Heightec DUON Safety Helmet vented version has vents that can be switched to give conformity with either standard. All switching is carried out without tools

The DUON’s maximum lifespan has been increased to 10 years use. Previously this was limited to 5 years use and 5 years storage (a total of 10 years)


  • 30mm ‘T-slot’ side fittings for standard ear defenders etc
  • Clips for elastic strap mounted lights, cameras etc
  • Brackets front and rear for popular cap lamps and other accessories


  • Main adjustment to small/medium/large helps keep the helmet centred on the head
  • Fine adjustment by ratchet wheel, can be operated with one hand even whilst being worn
  • Headband height adjustment allows user to maintain field of view
  • 6 point head cradle for stability


  • EN397 (‘industrial’) has a weak chinstrap to prevent injury if the helmet becomes trapped in machinery etc. and small vents to prevent items such as sparks hitting the wearer
  • EN12492 (‘mountaineering’) has a strong chinstrap so the helmet stays in place in a fall – protecting the head, and large vents to help prevent workers getting too hot – an occupational health improvement


  • Variable ventilation system
  • Controllable buckle release force
  • Seven points of adjustment
  • Contoured for unhindered upward vision
  • Compatible with range of accessories
  • Full range of colours & bespoke sticker options
  • Replacement sweat bands and pads
  • Dual certification
  • Sizing: 52cm to 66cm circumference
  • Weight: 0.35kg
  • Conformity: EN397, EN12492
Weight 0.3 kg
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Heightec DUON-Air Vented Height Safety Helmet