Humanscale Diffrient Smart Chair

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Humanscale Diffrient Smart Chair
from £ 774.00  excl. VAT
From £ 928.80 incl. VAT


Ergonomic task chair offering comfort, style and flexibility to complement your office.
  • The backrest tri-panel has Humanscale's revolutionary form-sensing mesh technology, which moulds around the user's spinal profile ergonomically.
  • Weight-sensitive, self-locking recline function automatically adjusts to each user, eliminating the need for levers and handles.
  • The backrest pivots automatically, offering perfect comfort and support in all positions.
  • The armrests are attached to the back of the chair, providing support with every move.
  • The seat cushion is sculpted to fit the body's natural contours, enhancing ergonomic comfort.
  • Modular design allows for continuing customisation.
  • Supports users between 5'0-6'4 tall and 7-21 stone weight.
  • The unique linear design creates a contemporary, eye-catching look.
  • Finished with high-performance textiles and meshes.
  • Made with recyclable aluminium and simple to disassemble.
  • 5-year guarantee on fabric/cushions and arm pads.
  • Complies with BS 7176: 2007 for Medium Hazard
  • yes
  • 15 years
  • yes
  • yes
  • yes

Product Information

Product Name Humanscale Diffrient Smart Chair
Brand HumanScale
Conditioning unit
Catalogue page 7

Technical Specification

Material Polyester
Back Min. height (mm) 984 mm
Back Max. height (mm) 1092 mm
Seating width (mm) 489 mm
Seat Min. depth (mm) 400 mm
Seat Max. depth (mm) 451 mm
Seat Min. height (mm) 413 mm
Seat Max. height (mm) 579 mm
Back width (mm) 470 mm
Max. weight supported (st) 21 st
Selection home office no
Seating time (h) 24 h
Weight (kg) 18.3 kg
Customer warranty 15 years
Adjustable seat height yes
Synchrone technic yes
Adjustable weight mechanism yes
Permanent contact mechanism yes
Adjustable lumber support (postair) yes


Quick info guide


Long-term comfort

Contoured seat cushions with a waterfall edge designed for long-term comfort, to reduce pressure points and provide weight distribution.


Supportive recline

Unique arm design attaches to the back frame to provide support throughout recline.


Lumbar support

Tri-Panel non-stretch mesh backrest for tailored comfort and lumbar support.



Innovative weight-sensitive, self-locking recline mechanism tailors to each sitters body weight to perfectly adjust the tension and recline of the chair.

Humanscale - freedom liberty task chair

Diffrient Smart

designed by Niels Diffrient

"My goal is always to design chairs that are so simple to use that the functionality is often invisible to the user."

Niels Diffrient

“As a result of seeking a really good adjustable arm, I was led in a direction that would allow me to do that in the best mechanical and serviceable way. That led me to the dominant visual feature of the chair... the horseshoe shaped aluminum support.”

Niels Diffrient, Designer