Humanscale Diffrient Smart Chair

Intuitive weight-sensing recline mechanism eradicates need for manual adjustments

Effective 11/15/2021, Humanscale will require a signature upon delivery for all FedEx shipments.

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Upgrade your office seating and change your life with the Humanscale Diffrient Smart Chair.

With the introduction of the Diffrient Smart Chair by Humanscale into your work routine, you can have a chair that's ideally suited for any space in your office, from the boardroom to the breakroom. The ergonomic chair adjusts intuitively without many manual adjustments, and features a weight-sensitive recline mechanism designed to react to individual bodies, with form-sensing mesh delivering additional support on three panels.

Not only is the Diffrient Smart Chair optimally ergonomic, it's a stylish addition to most modern offices that need a serious seating upgrade.


  • Intuitive weight-sensing recline mechanism eradicates need for manual adjustments
  • Tri-panel, non-stretch mesh back provides complete comfort and superior lumbar support
  • Sculpted seat cushions designed to support your body ideally
  • Optional deluxe armrests offer full range of height and width adjustment
  • Lightweight modern design
  • Sustainable manufacturing process
  • Made in USA

The Design Story

Since the success of Liberty and Diffrient World chairs, Diffrient wanted to design the Diffrient Smart chair, offering a chair with powerful aesthetic features. His desire was to create a task chair based on Humanscale’s philosophy of design, with seating that is beautiful, functional and user-friendly. Having straight, bold lines and a timeless horseshoe-shaped aluminum support, the Diffrient Smart chair fits in anywhere.

"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


Chair height 40" - 44.8" H
Adjustable armrest height 6" - 9.6" H
Seat height 17.63" - 22.8" H
Seat depth 16.25" - 18.75" D
Weight capacity 300 lbs




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Choose from a variety of arm options available on your Diffrient Smart Chair:

  • No armrests
  • Fixed height armrests with a durable Duron foam
  • Fixed height armrests with a durable Duron foam covered with upholstery to match your seat cushion
  • Height-adjustable armrests with a Duron arm pad
  • Height-adjustable armrests with a Duron arm pad upholstered to match your seat cushion
  • 4D adjustable armrests with a Duron arm pad
  • 4D adjustable armrests with a Duron arm pad with matching upholstery

Our recommendation: Most people will benefit from having adjustable arms


Frame Color

The frame of the Humanscale Diffrient Smart Chair is available in three colors:

  • Black frame with black trim (standard)
  • Dark Gray Frame with Brushed Aluminum Trim
  • Black Frame with Brushed Aluminum Trim

Back Mesh

The backrest of the Humanscale Diffrient Smart Chair is available in the following mesh styles. Please note that certain meshes may cause a longer lead time than others. To check lead time on a certain configuration, please give us a call at 1-800-531-3746 before placing your order.


Dash is one of the newest meshes available in the Humanscale line. It is characterized by its strength and durability.

Monofilament Stripe

The luminous quality of each individual monofilament strand creates a translucent effect, while also providing strength and durability.

Silver Check

This brilliant weave of monofilament strands and silver-coated yarns offers resiliency combined with a low abrasion factor.


Pinstripe offers a simple stripe pattern in a variety of enlivening colors.


Catena offers a unique pattern in a variety of modern colors.


Seat Fabric

Fourtis - Grade 1

Inspired by the Latin word fortis, meaning strong, this fabric is the ultimate ratio of durability and flexibility thanks to a unique weave of two-blended colors, and offering a four-way stretch.

Corde 4 - Grade 1

Constructed from cotton, Corde 4 includes a four-way stretch and a small, modular weave. The result is a dimensionally ribbed surface on the face of the fabric that remains soft to the touch.

Lotus - Grade 1

This four-way stretch textile is water repellant and easy to clean, making it an ideal textile for healthcare and hospitality environments. Its polyurethane finish with nylon backing boasts a soft texture while offering exceptional durability. It exceeds all standards for contract upholstery and healthcare tests.

Sensuede - Grade 3

Sensuede was developed to be the best and most luxurious engineered suede available. The faux suede's soft touch comes from the use of breathable and wrinkle resistant recycled microfibers that are finer than a human hair but are extra-strong, resulting in a very resilient fabric. This material also was selected because of its environmentally sensitive content and manufacturing process.

Ticino Leather - Grade 1

Ticino is a semi-aniline dyed leather available in a variety of rich colors inspired by nature. It is a top, corrected grain leather to create a more natural aesthetic and ensure the leather remains as unique as the hide itself.

Corvara Leather - Grade 3

Corvara is a semi-aniline dyed leather that offers a smooth, silky feel and ultimate durability. It is a top, full grain leather that is embossed lightly for a consistent, uniform grain structure.


Box Stitching Color

Choose from a variety of different color box stitchings for your chair. This option is only available for leather upholstery.


Seat Height

The Humanscale Diffrient Smart Chair is available in your choice of four cylinder heights. Seat heights are measured from the floor to the compressed front center of the seat cushion:

Standard 16'' - 21'' H
Low 15.25'' - 19.5'' H
Tall 17'' - 22.25'' H
Return to height 17.7'' - 19.9'' H


The Humanscale Diffrient Smart Chair is available with your choice of standard casters or soft casters for hard floors.

Standard Hard Casters 2 1/2" double-wheeled for carpeted floors
Soft Casters 2 1/2" soft double-wheeled for hard floors


The Humanscale Diffrient Smart Chair can be ordered with either standard plastic components or CAL 133 compliant components.


No Returns or Cancellations

Due to manufacturer policy, this item cannot be returned once received nor canceled once ordered.
If you have any questions about the Humanscale products we offer, or about the no return policy on Humanscale items contact us.

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Warranty Policy

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Return Policy

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