heightec Duon Helmet - Zero VAT If bought for personal use

(Zero VAT)

Only Zero VAT - If purchased by an individual for personal use. Please do not order more than 1 at a time!

heightec Duon Work at Height and Confined Spaces Helmet

This heightec Duon is the ultimate helmet for work at height and confined spaces. The Duon unvented helmet allows wearers to be fully compliant in complex environments containing different, changing hazards.

Full description


heightec Duon Work at Height and Confined Spaces Helmet

IMPORTANT NOTICE: This helmet is Zero VAT when purchased by an individual for industrial use. These must not be supplied to persons for use by their employees (buying for employees requires the purchaser to pay VAT).
Please note we will call to take payment for the VAT if more than one is ordered.

Please click here for VAT inclusive helmet.

The Duon unvented helmet is a high specification confined space helmet suitable for work at height, with dual certification meeting both industrial standards. It is the first and only safety helmet meeting all of the technical requirements for working at height and confined areas.

The heightec Duon helmets have a unique chinstrap buckle 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.

This unvented height safety helmet complies with European standards, EN 397, having a special chin strap buckle (see below) with a variable fastening power. It also conforms to MM 440 V a.c.

The Duon is suitable as a confined space helmet – a versatile safety helmet for every industry. Industrial safety helmets are designed to protect not only the upper part of a wearer’s head but also to provide lateral protection. Advanced cradle design enables optimum comfort and sized to fit between 52cm to 66cm.

MH01 – DUON™ standard – unvented EN 397

The heightec Duon Unvented helmet standard colours are White, Green and Orange. Other colours may be available subject to quantity required, please contact us for details.

Key Features

  • Instant configuration
  • 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


  • ‘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.



Manufacturer's Downloads




Helmet Shell
Helmet Protection
Electrical, Molten-metal splash, Lateral deformation, Low temperatures,
Head Circumference Min
Head Circumference Max
Chinstrap Strength
Weaker - EN397


Industrial or Sport Use
CE EN397
Weight (g)

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heightec Duon Helmet