EU Standards for Office Chairs

The primary standard for office chairs in the EU is EN 1335, officially titled 'Office Furniture - Office Chairs - Dimensions, Performance, and Safety Requirements'. It is a core regulatory standard developed for office chairs in the European market, and exporting to the EU requires passing this standard's testing to obtain CE marking compliance certification.

Three Parts of the EN 1335 Standard

1. EN 1335-1: Dimensions and Static Strength Criteria
   This section defines the basic parameters of office chairs, including key dimensions such as seat height, backrest height, and seat depth. It also introduces specific numerical requirements for the adjustability of lumbar support height. For example, seat height must accommodate users of different heights, and the backrest must provide sufficient lumbar support to reduce fatigue from prolonged sitting. These parameters are standardized to ensure office chairs meet basic ergonomic needs.

2. EN 1335-2: Safety Requirements
   This part specifies more than ten safety testing methods covering scenarios such as stability, chair wheel resistance, and seat and backrest durability. For example:

   • Stability Testing: Simulates the chair's resistance to tipping at different angles (e.g., leaning forward or backward);
   • Chair Wheel Resistance Testing: Evaluates whether the resistance of the wheels when moving on the ground falls within a safe range;
   • Durability Cycle Testing: Uses mechanical devices to simulate repeated sitting pressures and backrest leaning over a ten-year usage cycle to ensure no structural damage occurs.
     These tests aim to protect users from accidental injuries caused by chair failures during use.

3. EN 1335-3: Ergonomic Evaluation
   This section assesses the dynamic comfort of office chairs by combining subjective experiences with objective data. For example:

   • Seat Tilt Angle: Must maintain a reasonable angle under specific loads to avoid compressing leg blood vessels;
   • Armrest Height: Must coordinate with seat height to reduce shoulder fatigue;
   • Deflection Measurement: Uses instruments to record the degree of deformation of the chair under load to determine whether it meets the general expected support levels of the population.

Other Related Standards and Considerations

• EN 12520: Although this is a safety and performance standard for domestic seating furniture in Europe, it explicitly does not apply to office chairs and should not be confused with them.
• CE Marking Compliance: Office chairs exported to the EU must complete testing according to EN 1335 and display the CE mark on the product to prove compliance with EU health, safety, and environmental requirements.

EN 1335 provides a unified technical specification for the European market by covering dimensions, safety, and comfort of office chairs in a modular design. It is also an essential certification basis for companies exporting to the EU.