EU-Certified Office Chair

EU-certified office chairs primarily adhere to the EN 1335 standard, which covers design, safety, and ergonomic requirements and serves as the core basis for the legality of the CE mark. The following provides an explanation from three aspects: standard composition, test content, and compliance significance:

I. Three Parts of the EN 1335 Standard

EN 1335 is the core regulation formulated by the EU for office chairs and is divided into three independent parts:

1. EN 1335-1: Dimensional Specifications
   Defines the basic parameters of office chairs, including seat height (typically 40-53 cm), backrest height (≥45 cm), seat depth (38-48 cm), etc. Recent revisions have added specific numerical requirements for the adjustability of lumbar support height, such as the support point needing to be within the range of 15-22 cm above the seat surface to accommodate users of different body types.

2. EN 1335-2: Safety Performance Testing
   Specifies more than ten test methods to simulate typical wear scenarios over a ten-year service life:

   • Stability Testing: Includes forward, backward, and lateral stability to ensure the chair does not tip over during normal use or minor collisions;
   • Chair Wheel Resistance Testing: Verifies whether the sliding resistance of the chair wheels on different surfaces (such as carpets and hard floors) complies with safety ranges;
   • Durability Cycle Testing: Conducts tens of thousands of load-unload cycles on the seat and backrest to detect material fatigue and structural stability.
     The updated EN 1335-2:2018 in 2018 replaced the previous version of the standard, adopting the strength testing method of EN 1728:2012 to further increase the rigor of the tests.

3. EN 1335-3: Ergonomic Evaluation
   Combines subjective experience with objective indicators to assess the dynamic comfort of the chair:

   • Seat Inclination Angle: Needs to be within the range of 5°-15° to avoid sliding forward or excessive pressure on the lower back;
   • Armrest Height: Should allow the forearms to rest naturally parallel to the desktop;
   • Deformation Measurement Testing: Records the degree of deformation of the chair under specific loads using measuring instruments to determine whether it meets ergonomic expectations.

II. Compliance Requirements for the CE Mark

Under the EU product safety framework, the CE mark is a self-declaration by the manufacturer that the product complies with relevant directives. For office chairs, the physical performance and ergonomic evaluation system established by the EN 1335 standard is the core basis for the legality of the CE mark. If a product fails to pass all tests of the standard (such as substandard safety performance or ergonomic design flaws), the declaration of the CE mark will be invalid, and the product may face market bans or legal penalties.

III. Significance of Standard Revisions

The continuous revisions of EN 1335 (such as the 2018 update) reflect the EU's higher requirements for the safety and comfort of office chairs. For example, the addition of requirements for the adjustability of lumbar support aims to reduce the risk of lumbar spine diseases caused by prolonged sitting; strengthening durability testing ensures that the product has a longer lifespan in actual use. These revisions not only protect consumer rights but also drive technological upgrades in the industry.