Office Chairs: The EN1335 Standard

The revision of the EN1335 standard in late 2020 brought important changes to the world of office chairs. This standard, which we will provide a comprehensive overview of, places special emphasis on ergonomics and the implications for health and well-being in the workplace.

EN1335:2020 introduces new evaluation standards and an updated classification of office chairs, considering anthropometric variations and innovative materials used in their manufacture. A key aspect of this standard is the adoption of a new international measurement method for breathable mesh backrests.

The Ax, A, B and C classification

Office chairs are divided into four classes: Ax, A, B and C. We will now briefly examine each class.

• Class Ax: this class is derived from the old Dutch standard NPR1335 and is designed to accommodate the different sizes of people, typical of northern European markets. Class Ax chairs must offer a wide range of adjustments, including height, seat depth and armrests;
• Class A: the real innovation is Class A chairs, which have undergone major changes from the previous edition of the standard.
  These chairs require higher-performance components that are seamlessly combined. For example, they will need a gas piston that allows wide seat height adjustment (at least 13 cm) and a seat with a minimum height of at least 40 cm. The seat (depth adjustment of 70 mm), armrests and stability (verified by anti-tip testing) are also subject to strict standards;
• Class B: class B largely corresponds to the former Class A standard of EN1335. Class A chairs in the old standard should be largely approved as Class B chairs in the new edition.
• Class C: class C covers office chairs and introduces new adjustment parameters, although with fewer restrictions than previous classes. In this case, there is some continuity with Class C chairs in the previous regulations;

Solutions to promote well-being and excellence at work

In summary, the "new" EN1335 standard has two classes in continuity with the previous edition (Class B and Class C), one class that adopts the old NPR regulations (Class Ax), and an important new feature (Class A) that sets a higher standard for office chairs.

These changes require a more systematic approach by manufacturers, specially designed components that perform better. Precisely for this reason, tavolisedie.com offers a wide range of ergonomic and certified chairs in line with EN1335.

Our catalog is complete with next-generation items designed to meet Class A requirements and ensure superior performance. Contact us now for more information on EN1335:2020 compliance and to discover our office chair solutions.