ergonomic chairs

How do I choose the correct EN 1335 class (Ax, A, B or C)?

Match class to use and user diversity: Ax for intensive use (>8 h/day) and broad adjustability; A for daily use with full adjustments; B for standard workstations with essential settings; C for intermittent use (meeting rooms). For mixed teams, prefer Ax or A to cover a wider anthropometric range.

What documents should I request to prove compliance?

Ask for a third-party test report to EN 1335-1:2022 stating the class, the manufacturer’s Declaration of Conformity, and the technical data sheet with dimensional ranges (seat height/depth, backrest and armrest adjustments). Include user instructions and a label or QR referencing the exact model supplied.

Will an EN 1335 chair help with EU/UK H&S requirements?

Yes. EN 1335 defines minimum dimensions and adjustments that support DSE risk assessments and employer duties under EU directives and UK DSE regulations. Keep the compliance dossier on file and record basic user training on set-up to demonstrate good practice.

What really makes a task chair ergonomic in practice?

Look for: seat height and depth adjustment, synchronised mechanism with tension control, adjustable lumbar (height/depth), 3D/4D armrests, 5-star base and correct castors for the floor. Do a 60-second fit check: feet flat, 2–3 fingers behind the knees, elbows at 90° to the worktop, lumbar at L3–L5, backrest follows you smoothly.

What affects total cost of ownership over 7–10 years?

Spare-part availability (castors, gas lift, arm pads), replaceable upholstery/mesh, warranty length and on-site service SLAs, and a light maintenance plan (quarterly checks of bolts, castors and gas lift). Well-specified models reduce downtime and extend service life.

How to do a 60-second ergonomic reset at your workstation

1. Set seat height until knees are ~90–100° with feet fully supported (use a footrest if needed).
2. Slide the seat so 2–3 finger widths remain between seat edge and the back of the knees.
3. Raise lumbar to L3–L5 and adjust pressure so it supports without pushing.
4. Set armrests to keep shoulders relaxed and elbows at ~90° aligned to the desk surface.
5. Unlock the synchro, dial tension to your weight, and allow gentle movement through the day.

How to specify ergonomic chairs for a tender or multi-site order

1. Minimum spec: EN 1335 class A or Ax; seat height and depth adjustment; synchro with tension; adjustable lumbar; 3D/4D arms; 5-star base; floor-appropriate castors.
2. Documents: third-party test report stating class, Declaration of Conformity, technical data sheet with ranges, user guide, label/QR for model traceability.
3. Services: delivery and assembly, user briefing or QR set-up video, spare-parts commitment, and response times for warranty support.