Humanscale: Why We Carry America's Most Sustainable Ergonomic Furniture at Comosum

Humanscale is a New York-based ergonomic workspace furniture company founded in 1983. The company holds B Corp certification — achieved in April 2024 and the only major commercial furniture brand in the US to do so — and has 29 products certified as climate-positive, water-positive, and energy-positive by the International Living Future Institute's Living Product Challenge, representing over 55% of total sales revenue. We carry Humanscale at Comosum because it sits at the intersection of genuine sustainability leadership and enduring ergonomic design — exactly what purposeful, sustainable home office furniture should look like.

The Story Behind Humanscale

In 1983, Bob King founded Humanscale in New York City. It was the moment the personal computer was arriving on office desks at scale, and workers were beginning to feel the consequences in their necks, backs, and wrists. King's founding philosophy was precise: design tools that allow people to adjust their work to their bodies, not their bodies to their work.

The pivotal chapter came in 1997, when King met Niels Diffrient — widely regarded as the father of modern ergonomics. Diffrient had spent decades studying how furniture actually affects the human spine, going back to 1955 when he began analyzing X-rays of people seated in chairs. Over twenty years, he had been quietly developing a chair that adjusted to the sitter automatically — without levers, knobs, or manual configuration.

In 1999, that research became the Freedom Chair: the world's first self-adjusting ergonomic task chair, using the sitter's own body weight rather than springs or mechanical controls to calibrate recline support. Within months of its launch, the New York Times described it as setting "the gold standard" in seating. Over two million Freedom Chairs have since been sold globally, and the design now sits in the permanent collection of the Cooper Hewitt, Smithsonian Design Museum.

The 2004 Liberty Chair — also designed by Diffrient — followed as a lighter, mesh-back counterpart, applying the same body-weight recline logic in a more compact format. The Diffrient World Chair, another collaboration, extended the philosophy further. Where many office furniture brands prioritize complexity, Humanscale's approach has always been the opposite: fewer parts means fewer failure points, easier repair, and less waste. That is not an aesthetic choice — it is a sustainability strategy built into the design process from the beginning.

In 2025, Humanscale debuted "Humanscale Living" at Salone del Mobile in Milan, expanding deliberately into residential design — bringing ergonomic home office furniture into the same conversation as considered interior furnishing.

How Humanscale Builds Sustainably

Materials

Humanscale has 29 products certified by the International Living Future Institute's Living Product Challenge as climate-positive, water-positive, and energy-positive — the most rigorous sustainability standard for manufactured products anywhere in the world. These 29 certified products account for more than 55% of Humanscale's total sales revenue, meaning the majority of what Humanscale sells has been independently verified to give back more to the environment than it takes.

The Path Task Chair incorporates ocean-recovered materials: its Smart Ocean chair line uses nearly 2 lbs of reclaimed fishing nets per chair — giving Humanscale the highest number of ocean-plastic chairs in the commercial furniture industry. The Freedom Ocean Headrest chair is constructed with 19% post-consumer and 15% pre-consumer recycled content. Across the range, all products are designed to eliminate Red List chemicals — the class of substances identified as harmful to human health that remain common in conventional furniture manufacturing. Humanscale also holds FSC certification for wood-based components.

Manufacturing & Circularity

Humanscale is B Corp certified — achieved in April 2024, and the only major commercial furniture brand in the United States to hold this status. B Lab's certification evaluates governance, worker conditions, community impact, environmental stewardship, and customer accountability.

In 2022, Humanscale became the first furniture manufacturer in the world to earn TRUE® Zero Waste Gold and Silver certifications across all of its global factories — TRUE standing for Total Resource Use and Efficiency. The company hit a 90% global landfill diversion rate in 2020 and has set a target of 100% diversion by 2030. In 2024, Humanscale launched its "Refreshed" circularity program: returned and traded-in products are refurbished and reintroduced into inventory rather than being discarded, giving each piece a second life.

Humanscale also holds EcoVadis Gold certification and an A- rating on CDP climate disclosure (2024). In 2025, the MMQB ranked Humanscale #1 for sustainability across the entire contract furniture sector, placing first in 4 of 12 evaluated categories — a meaningful independent signal of where this brand stands among its peers.

Certifications at a Glance

• B Corp (April 2024) — only major US commercial furniture brand to hold this
• Living Product Challenge — climate-positive, water-positive, energy-positive (29 products, 55%+ of revenue)
• EcoVadis Gold
• CDP A- (2024)
• TRUE® Zero Waste Gold and Silver — all global factories (2022, first in the industry globally)
• FSC (Forest Stewardship Council)
• MMQB #1 ranked for sustainability in contract furniture (2025)
• 15-year warranty — a built-to-last design commitment

Why Humanscale Belongs at Comosum

The home office is no longer a temporary arrangement — it is a permanent room in millions of homes, and it deserves the same design intention as the rest of the house. For years, the ergonomic seating category has been dominated by brands that treat function and environmental responsibility as competing priorities. Humanscale proves they are not.

We carry Humanscale because it is the only major brand where genuine sustainability leadership and ergonomic excellence exist in the same product. The Freedom Ocean Headrest and the Diffrient World Chair are not office furniture in the disposable sense — they are long-form investments in how you work. The 15-year warranty reflects a design philosophy we share across every category at Comosum: buy once, buy well. Humanscale's Living Product Challenge certifications mean specific products actively regenerate more resources than their production consumes — an extremely rare claim in any manufacturing category, let alone furniture.

Comosum's catalog had a gap in purposeful home office furniture. Humanscale fills it without asking us to compromise on original design, material honesty, or sustainability rigour. We're proud to carry it alongside the other sustainable furniture brands in our collection. Learn about our ergonomic seating philosophy in our post on Varier: Norway's Ergonomic Seating Pioneer, or explore our spotlight on Anglepoise: Britain's B Corp Lighting Pioneer — another brand where certification and design craft coexist.

Browse the full range of task chairs, sit-stand desks, monitor arms, and task lighting in the Humanscale collection at Comosum.

Explore Humanscale at Comosum

Here are the Humanscale products currently available at Comosum, each selected for how it performs in a real home office context:

• Freedom Ocean Headrest — The iconic Freedom Chair in its most refined form, built with 19% post-consumer recycled content and ocean-recovered materials, with a self-adjusting recline that responds to body weight rather than manual levers.
• Path Task Chair — A Living Product Certified ergonomic task chair made with ocean-recovered fishing nets, designed to support natural movement throughout the workday without sacrificing environmental integrity.
• Trea Task Chair — A lightweight, Living Product Certified chair designed by Todd Bracher, using a solid-state recline mechanism with zero moving parts — elegant, low-maintenance, and built to last.
• World LM Task Chair — The Diffrient World Chair in its latest generation, combining the signature body-weight recline logic with a breathable mesh back and a refined profile suited to both home office and studio environments.
• Float Micro Desk — A compact sit-stand desk designed for smaller home office footprints, with a pneumatic lift mechanism and a cable management system that keeps surfaces clean and clutter-free.

Browse the full Humanscale collection at Comosum →

Frequently Asked Questions About Humanscale

Where is Humanscale furniture made?
Humanscale is headquartered in New York City and manufactures its products across multiple global facilities. The company holds TRUE® Zero Waste certifications for all its factories globally — the first furniture manufacturer in the world to achieve this across all production sites. Humanscale's sustainability program provides full transparency on manufacturing and environmental commitments.

Is Humanscale furniture sustainable?
Humanscale is the only major commercial furniture brand in the US to hold B Corp certification, achieved in April 2024. The company has 29 products certified as climate-positive, water-positive, and energy-positive by the International Living Future Institute's Living Product Challenge — the most rigorous sustainability standard for products in the world. These certified products represent over 55% of Humanscale's total sales revenue.

What materials does Humanscale use?
Humanscale uses recycled and reclaimed materials including ocean-recovered fishing nets in its Smart Ocean chair line, and post-consumer and pre-consumer recycled content across its seating range. All products are designed to eliminate Red List chemicals — harmful substances that are common in conventional furniture. Humanscale also holds FSC certification for wood-based components.

What is Humanscale's warranty?
Humanscale offers a 15-year, 24/7 warranty on its chairs (for users up to 300 lbs), reflecting a built-to-last design philosophy. This warranty period is one of the reasons Humanscale is a high-value investment for eco-friendly office chairs and home office setups rather than disposable task seating. Fabric, foam, and arm caps carry a 5-year limited warranty.

What makes the Freedom Chair different from other ergonomic chairs?
The Freedom Chair, designed by Niels Diffrient and launched in 1999, was the first task chair to use the sitter's own body weight rather than manual knobs and levers to adjust recline support. This self-adjusting mechanism means users never have to configure their chair — it adapts automatically to their body. The Freedom Chair has sold over 2 million units globally and is part of the permanent collection at the Cooper Hewitt, Smithsonian Design Museum.