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The H System® is tested to the latest security standards:

  • BS8621: 2007 - the latest standard for means of escape for enclosed areas of restricted access

  • BS3621: 2007 - the latest standard for key operation both sides for rooftops to ensure safe working conditions for operators

  • EN12209:2003 - the latest standard

  • EN1303:2005 - achieving the highest grades in all levels for attack resistance, durability and key related security

  • Anti bump testing (general vulnerability tests)

  • Integral cylinder within the lock so the cylinder cannot be extracted or snapped.

Weather Performance

As well as meeting the performance standards required for security and for fire, the H System offers a weather resistant option.


The H System® has been successfully tested in separate fire tests to BS476 part 22 1987 standard for 30 minutes and to BS EN1634-1, the standard European fire test for 60 minutes.


The H System® can be fitted to timber or steel doors. The fitting instructions detail a step-by-step guide on how to install the locks.

Gerda® Service Room Doorsets

Gerda® Service Room Doorsets offer the option of fire-ratings to half an hour or one hour and smoke-rated if required, as well as non fire rated options. The doorsets are factory fitted with the H System® and are tailored to requirements.

Options include:


• Electrical intake room doorsets

• Water tank room doorsets

• Boiler room doorsets

• Lift motor room doorsets

• Roof doorsets

• Dry riser cabinets






For further information on the options available, please refer to the

Gerda® Service Room Doorsets brochure


Product Information


              KM524079  BS8621


               KM524077 BS3621