1. Lumbar zone: integrated in the backrest, the lumbar zone provides comfortable and effective support for the lower back. The optional height-adjustable lumbar pad transitions smoothly into the flexible middle zone.
2. Sink-in zone: this flexible zone reduces back tension, removes pressure from the spinal discs and straightens the shoulders and head.
3. Shoulder zone: the support in the shoulder zone relaxes the neck muscles and enables the sitter to effortlessly maintain a horizontal viewing angle for computer work.
The multifunctional 3D armrests have 360 degree swivel movement, which is very useful for desk work.
The timeless appearance of AC 4 is just one aspect of its ecologically sustainable design. It bears the ‚Blue Angel‘ seal for low-emission upholstered furniture and GREENGUARD certification for indoor air quality.
Office swivel chair with 3D armrests according to EN 1335, Ergonomic Seal of Approval.
Mechanical unit: FlowMotion mechanism with synchronised forward tilt (can be disengaged) and with seat depth adjustment. Mechanical unit powder-coated in basic dark.
Backrest and seat: self-supporting backrest structure with horizontally stitched padding. Backrest mount in polished die-cast alumini- um. Optional height-adjustable lumbar support pad. Seat cushion in polyurethane foam. Cover in Plano or Twill fabric or in leather.
Armrests: optionally with fixed, polished die-cast aluminium ring armrests for conference areas (optional leather covers matched to the leather upholstery; for chairs with fabric covers, the leather armrest covers are in the colour nero) or with 3D armrests with polyurethane pads in basic dark.
Base: five-star polyamide base in basic dark or polished die-cast aluminium base with double castors (Ø 60 mm) in basic dark.
635-925 x 530-780 x 1010-1130 mm
AC 4 is available as an office swivel chair and in the version AC 4 Conference for meeting venues.