Humanscale Diffrient Smart Ergonomic Mesh Task Chair

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Product ID: 19025
List Price: $1,084.00
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Humanscale Diffrient Smart chair is an intelligent mesh task chair with a striking linear aesthetic that complements any environment. Engineered to provide automatic lumbar support for every user, as well as simplicity and ease of use, Diffrient Smart offers comfort, style and flexibility. Diffrient Smart was created by designer Niels Diffrient and, like Humanscale’s Liberty and Diffrient World chairs, uses Humanscale’s revolutionary Form-Sensing Mesh Technology and mechanism-free recline for perfect support for every user.

Featuring  a unique linear design, the Diffrient Smart chair is ideal for any high design environment. Created with Humanscale’s revolutionary Form Sensing Mesh Technology, Diffrient Smart’s tri-panel backrest fits like a perfectly tailored shirt to provide exceptional lumbar support. Using Humanscale’s weight sensitive, self-locking recline mechanism, Diffrient Smart automatically adjust to each sitter and provides perfect support to any posture. Diffrient Smart is also available in Diffrient Smart Plus with a wider seat and additional support.

Featuring the same timeless aesthetic, Form-Sensing Mesh Technology and seamless functionality as Diffrient Smart, Smart Ocean is the embodiment of our commitment to sustainable manufacturing. Humanscale has partnered with Bureo - an emerging venture developing innovative solutions to prevent ocean plastic pollution. Smart Ocean is built with recycled material that originates from Bureo's Net+Positiva program, which facilitates waste disposal points for plastic fishing nets off the coast of Chile and provides incentives for the collection of discarded materials. Smart Ocean is the first-ever task chair to incorporate recycled ocean plastics in its material composition and is also Living Product Challenge-certified.

Technical Drawing

Technical Drawing for Humanscale Diffrient Smart Ergonomic Mesh Task Chair


Supports User height range of 5'0" - 6'4" and weight range of 100 lbs - 300 lbs
Contoured Seat Cushions Measure 19.25" wide and 2" thick
Seat Depth 16.25" - 18.75" adjustment range
Chair Weight 34 lbs with arms, 31 lbs without arms
Chair Width 26.5" with arms, 21" without arms
Base Size 26"
Seat Height Range 16.5" - 22.8"
Recline Range 18° recline + 8° backrest tilt
Stackable No
Warranty 15 years


  • Ease of Use - Featuring Humanscale’s weight-sensitive, mechanism-free recline, Smart automatically adjusts to the body weight of each sitter to provide perfect recline support. Using the laws of physics, all the user has to do is sit and the chair will provide the correct amount of tension for their shape.

  • Linear Visual Design - Free of manual controls, Diffrient Smart has a striking, sleek aesthetic, and its U-shaped back makes it the perfect fit for any high-design environment. With linear lines in the backrest and strong mesh for maximum support, it’s the ideal task chair for the modern, active workspace.

  • Tailored Backrest - To ensure every person who sits in Diffrient Smart would have perfect lumbar support, Diffrient created a tri-panel mesh backrest to automatically adapt to the user’s needs. Eliminating the need for complicated adjustments and external lumbar devices, Diffrient Smart uses Form-Sensing Mesh technology for easy, ongoing comfort.

  • The Diffrient Smart chair is ideal for Workstations, Conference Rooms, Reception Areas and Home Offices

  • Distinctive linear design that compliment any environment

  • Innovative weight-sensitive, self-locking recline mechanism with 20 degrees of movement uses each sitter’s body weight to perfectly adjust the tension and recline of the chair

  • Automatically pivoting backrest with seven-degree back tilt offers perfect lumbar comfort in all positions

  • Unique arm design attaches to the back frame to provide support during full range of recline

  • Tri-Panel non-stretch Mesh Technology provides perfectly tailored comfort and lumbar support for any posture

  • Modular design ensures easy maintenance and allows the user to update the chair’s aesthetic

  • Contoured seat cushions that closely follow the body’s shape and finished with a waterfall edge to offer long-term comfort, reduce pressure points and provide weight distribution

  • A variety of high-performance textiles and proprietary meshes complement the chair’s form

  • 15 year warranty


Niels Diffrient - Niels Diffrient's designs are grounded in the philosophy that form follows function. His work has spanned generations, consistently looking past trends to reinvent the tools we use for daily living.

With an academic foundation in design and architecture and a degree from Cranbrook Academy, Diffrient channels his knowledge of engineering, architecture, and human factors into the creation of highly functional and aesthetically timeless designs.

From his early work with the studios of Eero Saarinen, Marco Zanuso, and Henry Dreyfuss to his current work with Humanscale, Diffrient's visionary talent has been widely recognized. Included among his many honors are the 2002 National Design Award from the Smithsonian's Cooper-Hewitt, National Design Museum, and the 1999 Chrysler Design Award. In recent years, Diffrient had focused his energies on designs for the office environment, particularly seating - a category in which he has pioneered numerous breakthroughs, from pneumatic cylinders for seat height adjustment to weight-activated automatic recline.

Design Story

"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

Following the success of Liberty and Diffrient World, Niels Diffrient developed Diffrient Smart to offer a chair with strong visual features. He wanted to create a task chair that was in line with Humanscale’s philosophy of designing seating that is simple, beautiful and effortless to use. Diffrient Smart has straight, bold lines and a timeless horseshoe-shaped aluminum support, so its suit any environment it is placed in.

Environmental Story

Like all Humanscale products, the Diffrient Smart chair was designed with a constant and genuine focus on its environmental impact at every stage of its development. For us, the best designs in the world achieve more with less, and sustainability is the natural result of this focus.

The Diffrient Smart chair’s lightweight design minimizes the environmental impact of its shipping. Its use of highly recyclable aluminum and its simple, modular design makes it easy to disassemble and maintain rather than replace the chair completely. The Diffrient Smart chair is GREENGUARD Indoor Air Quality, GREENGUARD Gold and level 2 certified.

Option 1: Armrests

No Arms


Fixed Duron Arms

Fixed Duron Arms

Fixed Duron Arms with Textile

Fixed Duron Arms with Textile

Adjustable Duron Arms

Adjustable Duron Arms

Adjustable Duron Arms with Textile

Adjustable Duron Arms with Textile

Height Adjustable Duron Arms with Matching Textile Cover

4D Adjustable Duron Arms

Height Adjustable Duron Gel Arms

4D Adjustable Duron Arms with Textile

Option 2: Frame Color

Black with Black Trim

Black with Black Trim

Dark Gray Frame with Polished Aluminum Trim

Dark Gray Frame with Polished Aluminum Trim

Black Frame with Polished Aluminum Trim

Black Frame with Polished Aluminum Trim

Option 3: Mesh Color and Style

M - Monofilament Stripe

Made specifically for our tri-panel, mesh-backed chairs, Monofilament Stripe has an elastic composition that achieves strength through its distinctive weave structure to provide unmatched support. Its classic stripe pattern is available in various striking colors. Using only monofilament yarns that are thin and strong, a simple but classic stripe pattern is achieved through weave structure and yarn placement. This pattern has slight elasticity but terrific memory.

Monofilament Stripe Black


Monofilament Stripe Carbon


Monofilament Stripe Platinum


Monofilament Stripe Green


Monofilament Stripe Atlantic


Monofilament Stripe Amber


C - Silver Check

Woven with monofilament and silver-plated yarns, Silver Check has a subtle metallic shimmer that creates a sophisticated finish to any chair. This non-stretch mesh is flexible and strong, providing ergonomic support to every user. This unique translucent pattern is achieved using monofilament and a silver-plated yarn spun with polyester at its core. More than simply an aesthetic choice, the silver-plated yarn gives the textile flexibility and strength.

Silver Check Alloy


Silver Check Topaz


N - Pinstripe

Inspired by the Brooklyn Bridge, Pinstripe explores the idea of "suspension." Composed of two Monofilament stretch yarns, Pinstripe helps the chair’s tri-panel backrest cradle the user’s body and features a floating line of color for a distinctive aesthetic. Designed specifically to work with the Diffrient World Chair, this lightweight fabric provides the strength and support of a much heavier mesh by using two different monofilament stretch yarns to provide proper support.

Pinstripe Black


Pinstripe Cadmium


Pinstripe Citron


Pinstripe Crimson


Pinstripe Cyan


Pinstripe Graphite


Pinstripe Silver


Pinstripe White


A - Dash

Named for the way color dashes across the surface of this textile, Dash was designed to resemble embroidery floss. It maintains a strong, responsive and lightweight composition to accommodate the user’s every move. Designed to resemble embroidery floss, Dash is stronger, more responsive, lighter weight and uses less material than most mesh textiles. It gives the user support, comfort and ease of movement, while meeting Humanscale’s seating requirements.

Dash Platinum


Dash Zinc


J - Catena

Catena features a pure, clean weave - free of any additional patterns or motifs - in colors inspired by the rich hues of spices, which allow the chair to seamlessly integrate into its setting. It’s simple aesthetic makes it a classic design choice for modern and contemporary environments. Catena’s dense and rich hues are inspired by the vibrant spice markets of India. When used as a backrest textile, this proprietary non-stretch mesh provides a customized lumbar support through its tri-panel patented design that fits the user like a tailored shirt.

Catena Black


Catena Poppy Seed

Poppy Seed

Catena Caraway


Catena Bayberry


Catena Cornflower


Option 4: Textile

Grade 1 - K Lotus

Water repellant and easy to clean, Lotus is an ideal textile for the healthcare and hospitality environments. Its polyurethane finish with nylon backing boasts a soft texture that is pleasant to the touch while offering exceptional durability.

Grade 1: K - Lotus: Black (K101)

Black K101

Grade 1: K - Lotus: White (K128)

White K128

Grade 1: K - Lotus: Shale (K158)

Shale K158

Grade 1: K - Lotus: Hematite (K182)

Hematite K182

Grade 1: K - Lotus: Umber (K2C4)

Umber K2C4

Grade 1: K - Lotus: Walnut (K281)

Walnut K281

Grade 1: K - Lotus: Ochre (K302)

Ochre K302

Grade 1: K - Lotus: Verdant (K459)

Verdant K459

Grade 1: K - Lotus: Navy (K507)

Navy K507

Grade 1: K - Lotus: Plum (K603)

Plum K603

Grade 1: K - Lotus: Crocus (K608)

Crocus K608

Grade 1: K - Lotus: Eggplant (K624)

Eggplant K624

Grade 1: K - Lotus: Earth Red (K757)

Earth Red K757

Grade 1: K - Lotus: Lucky Red (K758)

Lucky Red K758

Grade 1 - CF Corde 4

Corde 4 is a four-way stretch design which moves with the sitter as they adjust positions in their chair, providing ultimate comfort. Its intricate weave structure, dimensional surface and wide array of neutral and vibrant shades are visually appealing and engaging to the touch.

Grade 1: CF - Corde 4: Black (CF10)

Black CF10

Grade 1: CF - Corde 4: Graphite (CF12)

Graphite CF12

Grade 1: CF - Corde 4: Dark Brown (CF21)

Dark Brown CF21

Grade 1: CF - Corde 4: Driftwood (CF22)

Driftwood CF22

Grade 1: CF - Corde 4: Balsam (CF43)

Balsam CF43

Grade 1: CF - Corde 4: Peacock (CF45)

Peacock CF45

Grade 1: CF - Corde 4: Thalo (CF52)

Thalo CF52

Grade 1: CF - Corde 4: Medium Gray (CF56)

Medium Gray CF56

Grade 1: CF - Corde 4: Navy (CF57)

Navy CF57

Grade 1: CF - Corde 4: Azure (CF58)

Azure CF58

Grade 1: CF - Corde 4: Deep Violet (CF62)

Deep Violet CF62

Grade 1: CF - Corde 4: Parma Red (CF78)

Parma Red CF78

Grade 1: CF - Corde 4: Pumpkin (CF86)

Pumpkin CF86

Grade 1 - FT Fourtis

Fourtis is a four-way stretch fabric that easily conforms to our cushions for the ultimate in comfort and flexibility. While still adjustable, its satin crepe weave structure is highly durable and creates a strong, high-performance fabric.

Grade 1: FT - Fourtis: Black (FT10)

Black FT10

Grade 1: FT - Fourtis: Granite (FT12)

Granite FT12

Grade 1: FT - Fourtis: Ash (FT16)

Ash FT16

Grade 1: FT - Fourtis: Alaria (FT44)

Alaria FT44

Grade 1: FT - Fourtis: Clover (FT49)

Clover FT49

Grade 1: FT - Fourtis: Nimbus (FT56)

Nimbus FT56

Grade 1: FT - Fourtis: Navy (FT57)

Navy FT57

Grade 1: FT - Fourtis: Boysenberry (FT63)

Boysenberry FT63

Grade 1: FT - Fourtis: Hyacinth (FT68)

Hyacinth FT68

Grade 1: FT - Fourtis: Winterberry (FT78)

Winterberry FT78

Grade 2 - F Ginkgo

Composed of 90% Wool, Ginkgo offers a pleasing texture and durability. Its subtle and elegant pattern makes this textile appropriate for a variety of environments. Ginkgo comes in vibrant and saturated colors, expanding the scope of Humanscale’s upholstery line.

Grade 2: F - Ginkgo: Black (F101)

Black F101

Grade 2: F - Ginkgo: Charcoal (F197)

Charcoal F197

Grade 2: F - Ginkgo: Walnut (F281)

Walnut F281

Grade 2: F - Ginkgo: Wheat (F315)

Wheat F315

Grade 2: F - Ginkgo: Green (F463)

Green F463

Grade 2: F - Ginkgo: Navy (F507)

Navy F507

Grade 2: F - Ginkgo: Storm (F556)

Storm F556

Grade 2: F - Ginkgo: Horizon (F568)

Horizon F568

Grade 2: F - Ginkgo: Harvest Orange (F816)

Harvest Orange F816

Grade 3 - D Sensuede

Offering style and performance, Sensuede was developed to be the best and most luxurious engineered suede available. The silky feel is the result of recycled microfibers that are breathable, extra-strong, and resistant to most stains and wrinkles.

Grade 3: D - Sensuede: Ebony (D111)

Ebony D111

Grade 3: D - Sensuede: Pewter (D115)

Pewter D115

Grade 3: D - Sensuede: Persian (D517)

Persian D517

Chrome-Free Leather Grade 1 - TL Ticino

Ticino is a semi-aniline dyed leather available in a variety of rich colours 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. Learn More about our Chrome-Free Leather.

Chrome-Free Leather Grade 1: TL Ticino Obsidian TL10

Obsidian TL10

Chrome-Free Leather Grade 1: TL Ticino Umber TL21

Umber TL21

Chrome-Free Leather Grade 1: TL Ticino Canyon TL22

Canyon TL22

Chrome-Free Leather Grade 1: TL Ticino Charcoal TL12

Charcoal TL12

Chrome-Free Leather Grade 1: TL Ticino Pebble TL11

Pebble TL11

Chrome-Free Leather Grade 1: TL Ticino Sand TL31

Sand TL31

Chrome-Free Leather Grade 1: TL Ticino Glacier TL13

Glacier TL13

Chrome-Free Leather Grade 3 - CL Corvara

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. Learn more about our Chrome-Free Leather.

Chrome-Free Leather Grade 3: CL Corvara Onyx CL10

Onyx CL10

Chrome-Free Leather Grade 3: CL Corvara Java CL21

Java CL21

Chrome-Free Leather Grade 3: CL Corvara Midnight CL57

Midnight CL57

Chrome-Free Leather Grade 3: CL Corvara Jasper CL71

Jasper CL71

Chrome-Free Leather Grade 3: CL Corvara Saddle CL23

Saddle CL23

Chrome-Free Leather Grade 3: CL Corvara Mineral CL11

Mineral CL11

Option 5: Seat Height - Cylinders

Standard 5

Standard 5" Cylinder


3" Return to Height Cylinder

Low 3.75

Low 3.75" Cylinder

Tall 5

Tall 5" Cylinder

High 8

High 8" Cylinder with 18" footring

High 8

High 8" Cylinder with 21" footring

Option 6: Casters - Wheels

Standard Hard Casters

Standard Hard Casters

Soft Casters

Soft Casters

Option 7: Base Style

Standard Matching Base

Standard Matching Base

Polished Aluminum Base

Polished Aluminum Base

Model Diffrient Smart
Manufacturer Humanscale
Part Number Diffrient Smart
Height Range User 5'0" - 6'4"
Weight Range User 100 lbs - 300 lbs
Seat Depth 16.25" - 18.75"
Seat Cushion 19.25" wide and 2" thick
Weight Chair: 34 lbs with arms, 31 lbs without arms
Width 26.5" with arms, 21" without arms
Seat Height 16.5" - 22.8"
Base Size 26"
Recline Range 18° recline + 8° backrest tilt
Warranty 15 years

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Humanscale Diffrient Smart Ergonomic Mesh Task Chair

Limited Warranty

Humanscale offers the following warranties on its products, subject to any exclusions and limitations as set forth below:

Product Warranty
Customer’s Own Material (COM, COL) No Warranty
Switch Mouse 1 Year, 24/7 Warranty
Technology Products 3 Years, Limited Warranty
Element Series Lights 10 Years, 24/7 Warranty
Horizon Series Lights 10 Years, 24/7 Warranty
Diffrient Series Lights 5 Years, 24/7 Warranty
Float Table, (Mechanical) 5 Years, 24/7 Warranty
eFloat and Electric Float 5 Years, 24/7 Warranty
QuickStand Sit/Stand Workstation, QuickStand Lite, QuickStand Eco, QuickStand Underdesk 5 Years, 24/7 Warranty
Fabric/Cushions/Arm Pads 5 Years, Single-Shift Warranty
M2, M/Flex & Para/Flex Monitor Arms 15 Years, 24/7 Warranty
M4, M7 & M8 Monitor Arms with Gas Cylinder Components 10 Years, 24/7 Warranty
Ballo Stool 3 Years, Single-Shift Warranty
Vessel Lights 10 Years, 24/7 Warranty, 3 Years 24/7 Warranty for the power supply driver
M/Connect 3 Years, 24/7 Warranty
M/Power 3 Years, 24/7 Warranty
M/Connect 2 3 Years, 24/7 Warranty
Monarch Mat 3 Years, 24/7 Warranty
Office IQ 1 Year, 24/7 Warranty
All other seating and products detailed in a current Humanscale Price Guide, unless otherwise specified 15 Years, 24/7 Warranty
All other products NOT detailed in a current Humanscale Price Guide Varies; consult your Humanscale representative for details

Modifying or tampering with any part of the base of the Float Table will render the warranty void. The warranty on the Float Table applies to the base and work surface if the table top is provided by Humanscale, and only to base if the table top is provided by a third-party, provided that the third-party table top meets the following requirements: (i) has a depth of 36" or less, (ii) has a width of 72" or less, and (iii) the total weight load including work surface is no more than 130 lbs for the standard base and no more than 160 lbs for the heavy duty base.

Note: Ballo is not a task chair. It has not passed the BIFMA or European EN standards for office seating. The Ballo in an exercise chair that is designed for dynamic seating and frequent movement. All Ballo instructions should be followed to ensure a comfortable experience.

Modifying or tampering with any part of the base of the eFloat or electric Float will render the warranty void. The warranty on the eFloat and electric Float applies to the base and work surface if the table top is provided by Humanscale, and only to base if the table top is provided by a third-party, provided that the third-party table top meets the following requirements: (i) has a depth of 36" or less, (ii) has a width of 72" or less, and (iii) a total weight load including work surface of no more than 200 lbs.

The warranties for the Vessel lights exclude labor and other costs associated with the installation and/or removal of the lights from ceilings, walls, fixtures, etc. Further, Humanscale has no warranty obligations if the product is affected by internal or external environmental conditions (including but not limited to water, moisture, outdoor use, or temperature damage), power fluctuations, improper power supply, or if the product is not installed and used in compliance will all applicable standards and electrical codes.

These warranties are available to the original end-user customer only and are non-transferable. For these warranties to be valid, the Humanscale product must have been purchased directly from Humanscale and/or an authorized dealership, distributor, retailer and/or reseller of Humanscale products. If products are procured through an authorized dealership, distributor, retailer and/or reseller, the end-user customer must be registered with Humanscale for the warranty to be in effect. Humanscale warrants that, at the time of customer’s receipt, the product will be in good working order and will be free from defects in materials and workmanship for the duration of the warranty term, as set forth above. These warranties do not apply to normal wear and tear or damage caused by accident, neglect, product abuse, misuse and/or failure to follow instructions relating to the product’s installation or intended use. Humanscale will not be responsible for damage due to service, maintenance, modifications or tampering by anyone other than a Humanscale authorized representative. Humanscale will not be responsible for injury or damage caused by or associated with the installation and/or use of products in any manner other than in strict conformance with the instructions set forth in its installation manuals and instruction sheets and/or product literature. These warranties do not cover damage caused by a carrier or transportation of the product from one location to another, or alterations made by owner. Humanscale does not warrant damages or defects to the products under the following conditions: an Act of God, damage from electrical power problems, usage of parts or components not supplied by Humanscale, failure to perform preventative maintenance, or damage caused by peripherals not supplied by Humanscale.

In the event a product or product part is defective in material or workmanship during the warranty period, and Humanscale receives written notice of the defect within the warranty period, Humanscale will determine with customer if the defect is covered under warranty. Humanscale, at its option, may repair or replace the defective product or product part determined to be under warranty with the same or comparable product or product part as determined by Humanscale, at customer’s location or at a designated Humanscale location. The labor costs associated with the repair of the product or product part may be the responsibility of Humanscale if the product or product part is determined to be under warranty. Humanscale must pre-approve the labor costs prior to the repair or replacement of warranty products or product parts. Customer must contact Humanscale to obtain a Return Authorization through the Humanscale Customer Service Department. Performance of any repair or replacement does not renew or extend the warranty period. If, after examining and testing a returned product or product part, Humanscale determines that the product or product part is not defective, Humanscale will notify customer and return the product or product part to customer. Customer will be responsible for the freight charges associated with the return of non-defective products or product parts. To return a product or product part for repair that is not covered by warranty, Customer must request a Return Authorization through the Humanscale Customer Service Department. Customer will bear the costs of labor and freight charges associated with non-warranty repair. Customer will be charged a standard repair fee, specific to the product, for any product that is repaired outside of the warranty period. Repairs on products out of warranty also carry a 90-day warranty, effective the day that Customer receives the repaired product or product part. For products that are not covered under warranty: Customer may upgrade to a newer, functionally equivalent product at the list price; the product or product part will be returned to Customer; or Customer can request in writing that Humanscale dispose of the product or product part for Customer, in which case a fee may apply as designated by local law.


Humanscale does not warrant that customer’s use of the Humanscale product will be uninterrupted or error free. Any implied warranties that may be imposed by law are limited in duration to the Limited Warranty period, to the greatest extent allowed by law. Some states or countries do not allow a limitation on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages for consumer products. In such states or countries, some exclusions or limitations of this Limited Warranty may not apply. This Limited Warranty is subject to change without notification.

Limitation of Liability
Purchaser’s remedies set forth herein are exclusive and the liability of Humanscale with respect to the breach of this agreement or any contract entered into between the parties pursuant hereto shall not exceed the price of the product or part on which such liability is based. In no event will Humanscale be liable to purchasers for any special, collateral, incidental or consequential damages however caused, whether by Humanscale’s negligence or otherwise. The remedies provided above are the purchaser’s sole remedies for any failure of Humanscale to comply with its obligations regarding the workmanship of its products. Correction of any nonconformity in the manner and for the period of time provided shall constitute complete fulfillment of all liabilities of Humanscale, with respect to or arising out of the product furnished hereunder.

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