Office Chairs in Europe: Regulations and Standards

The core regulatory standard that office chairs must adhere to in the European market is EN 1335, which ensures product compliance through specifications in dimensions, safety, and ergonomics.

EN 1335-1: Dimensions and Static Strength Benchmarks

EN 1335-1 defines the basic parameters of office chairs, including seat height, backrest height, and seat depth, ensuring that users of different body types can find a suitable fit. Recent revisions have added specific numerical requirements for the adjustability of lumbar support height, such as the support point needing to be in the middle-lower part of the backrest (typically 40-60 centimeters from the seat surface) to accommodate the lumbar curves of users of different heights. Additionally, this section specifies static strength indicators such as seat width and armrest spacing to ensure that the chair does not deform during long-term use.

EN 1335-2: Safety Testing Requirements

This section is the core safety specification of the standard, encompassing over a dozen testing methods:

• Stability Testing: Simulates the chair's resistance to tipping when tilted or subjected to force, such as applying lateral force to a chair with a reclining function to ensure it does not overturn.
• Durability Testing: Simulates a decade of use through cyclic loading, such as subjecting the seat to continuous pressure impacts 100,000 times and the reclining mechanism to 120,000 cycles of operation to verify structural reliability.
• Chair Wheel Resistance Testing: Evaluates the chair's mobility resistance on different surfaces (such as carpets and hard floors) to ensure smooth and safe use. The EN 1335-2:2018 update, released in 2018, replaced the previous version and adopted EN 1728:2012 as the strength testing method, further enhancing testing rigor.

EN 1335-3: Ergonomic Evaluation

This section assesses the chair's dynamic comfort by combining subjective experience with objective data:

• Seat Tilt Angle: Requires the tilt angle to be within a reasonable range (typically 5°-15°) to prevent users from sliding off or experiencing excessive lumbar strain.
• Armrest Height: Must allow the forearms to rest naturally, reducing shoulder and neck fatigue.
• Deflection Testing: Measures the degree of deformation of the chair under specific loads using instruments, such as ensuring that the seat edge does not sink more than 10mm under a 100kg pressure, to guarantee long-term use without deformation.

Compliance and CE Marking

After completing the full series of EN 1335 tests, companies can be considered to have met the core requirements of the EU's General Product Safety Directive (GPSD), thereby legally using the CE mark. It is important to note that countries like Germany may adopt localized versions (such as DIN EN 1335-1 corresponding to EN 1335-1:2020+A1:2022), but the core content remains consistent with EU standards.