Office Chair EN Certification

The EN certification for office chairs is primarily based on the EN 1335 standard system, covering ergonomic design, structural safety, durability, and mechanical performance testing. Upon passing, the CE mark is obtained to enter the EU market.

I. Composition of the EN 1335 Standard

The EN 1335 standard is divided into three parts:
EN 1335-1 focuses on ergonomic dimensions, specifying parameters such as seat cushion depth, seat height, and backrest angle to ensure that the design conforms to the human body's physiological structure and reduces fatigue from prolonged sitting; EN 1335-2 stipulates structural and material safety requirements, including stability, strength, and durability testing methods. The 2018 updated version adopts the EN 1728:2012 standard, covering all non-domestic seating; EN 1335-3 establishes mechanical testing methods to simulate real-world usage scenarios (such as frequent standing up and leaning back) to verify long-term reliability.

II. Core Testing Items

1. Ergonomic Verification: Standard mannequins are used to simulate sitting postures and weights, calibrating parameters such as seat cushion depth and backrest angle to prevent waist and neck strain.
2. Stability Testing: Includes forward (simulating tipping over when reaching for objects), backward (leaning back and sideways tipping), and lateral (balancing when standing up on one side) stability tests.
3. Strength and Durability: Structural reliability is verified through seat static pressure testing (repeatedly applying loads), backrest cycle testing (simulating millions of leaning-back motions), and armrest/footrest testing (evaluating load-bearing capacity and connection stability).
4. Rolling Resistance Testing: Assesses the rolling performance of chair wheels on different floor materials and the need for floor protection.

III. Certification Process and Significance

To obtain certification, an application form, product specifications, and technical documents must be submitted to the certification body. After laboratory testing and document review, those who pass are awarded a CE certificate and affix the CE mark. EN 1335 is a mandatory requirement for market access in the EU and serves as a quality benchmark for the global office chair industry. By simulating real-world usage scenarios, it identifies structural failure risks (such as five-star base fractures) in advance, ensuring user safety while enhancing product credibility and meeting the quality control needs of global leading brands.

IV. Differences from Other Standards

Compared to the North American BIFMA standard, which places greater emphasis on impact strength testing, EN 1335 additionally includes chair wheel rolling resistance assessment; some Asian standards may only require basic stability testing, whereas EN 1335 offers more comprehensive testing items, covering all aspects of design, materials, structure, and usage performance.