RH Logic 400 Ergonomic Office Chair


RH Logic 400 Ergonomic Office Chair

The RH Logic 400 is perfect for both remedial and preventative back care solutions, as well as 24/7 use in control rooms.

Based on the unique ‘two-point principle’ of upright posture and active sitting, the chair improves breathing and circulation, and stimulates the muscles. The one to one tilt action ensures that lower back support remains constant, whatever position the user sits in.

The RH Logic 400 Chair has a high backrest and comes as standard with lumbar pump, seat slide, luxuriously comfortable 20 mm extra foam in seat, back with improved ventilation, castors for carpeted floors, base in graphite aluminium and 24/7 Flax fabric.

The RH Logic 400 chair can also be enhanced with optional extras including armrests, extra large seat, neckrest and coccyx cut-out seat.

  • Ideal for your Working From Home Chair – WFH

Delivery & Assembly *

Our specialists can assemble your chair at your own premises, install all the components and demonstrate all the usage features.

Please note that these special delivery and installation prices are for Mainland UK only.


RH Logic 400 Chair Features

  • Fully adjustable for seat height, back rake angle, back height, seat slide and lumbar support
  • Unique ‘2PP’ principle ensures optimum support and blood circulation during dynamic sitting
  • Exchangeable seat and back pads to increase longevity and reduce cost of ownership
  • Memory foam and coccyx cut-out seat pads available, as well as 3D armrests
  • ESD version is available
  • Environmental impact is traceable through EPD (Environmental Product Declaration)
  • Ideal for your Working From Home Chair – WFH


Fabric Colour

  • Available in black, navy and royal blue


  • 8S Class A Armrests – Black – Black Frame. Adjustable in height and width. Rotating. Armrest height above seat 215-295 mm.
  • 8E Class A Armrests – Black – Silver Frame. Adjustable in height, depth and width. Armrest height above seat 215-295 mm.
  • 8R3D Relax Armrests. Adjustable height, depth and sideways position. Single arm option also available.


  • Height and depth adjustable

XL Seat

  • XL Seat – 485(w) x 515(d) mm – suitable for larger users

Coccyx Cut-out Seat

  • Coccyx relief recess cut out for injured coccyx

Gas Stem

  • Standard Height Gas Stem (410-530 mm)
  • 4Q Standard Height Black Gas Stem – Same gas stem as standard, but all in black rather than silver
  • High gas stem B (480-610 mm) – suitable for taller users
  • Upgrade to Black High Gas Stem B (480-610 mm) – Same gas stem as the high gas stem, but all in black rather than silver


  • Silver graphite 5X aluminium base (as standard)
  • Black 5X aluminium base
  • Polished 5X aluminium base


  • Castors for carpeted floors (as standard)
  • Castors for hard floors

Memory Foam Seat

  • Memory foam seat pad for extra comfort

CMHR Foam Seat

  • CMHR (Combustion Modified High Resilient) foam is used when the strictest fire code standards are required, such as in hotel lobbies, hospitals, schools, mass transit (airplanes, buses). The foam has a high density which helps it last a long time. Fire retardant chemicals in the foam give the texture a grainy feel

How to set up your RH Logic 400 Office Chair

Additional information

Fabric Colour

RH Logic 400 High Back Chair – Black, RH Logic 400 High Back Chair – Navy, RH Logic 400 High Back Chair – Royal Blue

Seat Width

457 mm

Seat Depth

465 mm

Seat Height

430 – 550 mm

Seat sliding range

60 mm

Backrest Width

447 mm

Backrest Height

620 mm

Weight Rating

23.5 Stone (150 kgs)





Back Size

Medium Back


10 Years, based on 8 hour use

5 years when used as 24/7 chair

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