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Diffrient Smart Conference


+ Luxurious and Unique Fit

+ Weight-compensating recline utilizes the sitter’s weight to provide automatic and personalized support in any position without the need for adjusting knobs and levers

+ Form-Sensing Technology takes on the shape of the sitter’s back as if it was custom made from them

Optional return-to-height cylinders keeps chairs at one uniform height, bringing the chair back to its highest position when unoccupied

+Completely upholstered in healthy, sustainable, and luxurious chrome-free leather

+Carbon Negative, Free of Red List Chemicals and made in a True Zero certified facility. Supports users 5’ – 6’4”, 100 - 400 lbs.

+ Minimal assembly required. 15-year limited warranty on the frame, and 5-Year warranty on textiles, cushion and arm pads.

+ Diffrient Smart Conference is Living Product Certified, meeting the most rigorous sustainable manufacturing criteria to date.

Humanscale meet the highest environmental standards


Smart Conference shares the same intuitive, ergonomic, and sustainable design as our award-winning Smart chair. It adjusts instantly to the user’s body, providing a perfectly tailored sitting experience for all, and is upholstered in premium chrome-free leather. No matter their shape or size, each sitter enjoys the same comfort, support, and movement in a chair that feels made just for them.

As with all Niels Diffrient designs, Smart Conference emphasizes function above all else. This approach provides a streamlined sitting experience, with unparalleled support for nearly every body type. It also results in a timeless, minimalist, and universally appealing aesthetic, appropriate for any meeting or collaborative setting. 


About the designer

As the pioneer of ergonomics, Niels Diffrient aimed to redefine the concept of the traditional task chair and instead design seating solutions that efficiently adapt to users, allowing them to move freely from posture to posture. Diffrient’s unique approach removed complexities found in other chairs, such as cumbersome recline levers and back tension dials. He realized that movement during recline took the pressure off the user’s body, and transferred it to the back of the chair. As a result, he developed the weight-sensitive, self-locking recline mechanism, definitively reinventing the features of modern task seating to be truly simple, beautiful, and functional.  


Smart Conference is exclusively upholstered in Maribo. This European leather was consciously selected for its alternative tanning and semi-aniline characteristics that expose its natural beauty, remaining durable without harmful chromium processing. This contributes to its luxurious look, feel, and comfort, the softest chrome-free leather we have ever seen.


Fabric Durability

The fabric features durable properties that support users of all shapes and sizes. Rigorously tested, the textiles are backed by a robust warranty and guarantee the same, brilliant aesthetic and performance on day 1,000 as on day one.



• Chair Width: 26.50” 

• Base Size: 26”

• Seat Height Range: 17.63” – 22.8”

• Recline Range: 18° recline + 8° backrest tilt

• Chair Weight: 41 lbs arms / 39 lbs armless

• Weight Capacity: up to 400 lbs

Quickship models offer:

• Backrest/Seat Textile: all in Black

• Fixed Duron Arms with Matching Textile

• Frame & Base in Polished Aluminum

• Foam back & seat pan

• Standard, Soft, or Locking casters

• 5” Standard, 3” Return Height or 5” Return Height Cylinder

For further details, download the Smart Conference brochure or the cleaning instructions.

Chair Sustainability

Saving the planet, one product at a time. The Diffrient Smart chair was designed with a constant and genuine focus on its environmental impact at every stage of its development. Diffrient Smart is Living Product Certified, meeting the most rigorous sustainable manufacturing criteria to date. This means that Diffrient Smart is climate, water, and energy positive. Every time we sell one of these products, the planet is better off. The Diffrient Smart chair is also GREENGUARD Indoor Air Quality, GREENGUARD Gold, and level® 2 certified. Download the Diffrient World sustainability report.  

Shipping & Returns

The chair ships within 6 weeks.

Return Policy

The manufacturer accepts no returns on their chairs. 


Humanscale offers a 15-year limited warranty on Chair frames. 5 Year warranty on textiles, cushion and arm pads.

Freight Claims

Freight Claims must be filed within 2 calendar days from the date of delivery. Pictures of damaged goods and the original cartons are required and must accompany the claim.