Turning Waste Into Waves: ZHA and Nagami Unveil the 3D-Printed Echo Chair

What happens when you mix high-end architectural math with discarded medical plastics? You get a piece of furniture that looks like it was grown in a sci-fi lab rather than built in a factory.

Renowned architecture studio ZHA (formerly Zaha Hadid Architects) has teamed up with Spanish 3D-printing trailblazers Nagami to launch the Echo Chair. Sculptural, looping, and entirely sustainable, this chair is a masterclass in how modern technology can rewrite the rules of recycled design.

One Continuous Line

At first glance, the Echo Chair looks like two separate fluid surfaces—an arching backrest that reaches down to the floor, and a scooped seat designed to cup whoever sits in it. But look closer.

The two forms actually emerge from a single, shared structural edge. ZHA used advanced parametric design software to calculate a geometry where one surface acts as a literal "echo" of the other. The entire chair was 3D-printed as a single, uninterrupted system, entirely dissolving the usual boundaries between structure, surface, and human comfort. Because it is printed layer by layer, it leaves behind a finely ribbed texture that gives the plastic an unexpectedly organic finish.

From Medical Waste to High Design

The real magic is in the material. Nagami crafted the piece using polyethylene terephthalate glycol (PET) derived from industrial waste—specifically, single-use medical plastics.

Instead of letting these materials sit in a landfill, the collaboration upgrades them into a durable, highly desirable piece of home decor. To make the plastic feel at home next to natural elements like stone or wood, the team developed four distinct colorways inspired by natural landscapes:

• Crisp white

• Deep black

• A striking white-to-translucent gradient

• A warm caramel tone (which gets its earthy hue from a bio-based cork composite)

As Sebastian Andia, ZHA’s project design director, puts it: "Our ambition was to transform an abundant, overlooked resource into an object people genuinely want to live with, demonstrating that sustainability and desirability can go hand in hand."

See It Live

If you happen to be in London, you can catch the Echo Chair in person. It’s currently on display as part of the London Creates architecture and design trade show at The Truman Brewery, running until July 26, 2026.

What is Parametric Design?

Instead of drawing a fixed shape, parametric design is an approach where you write a set of geometric rules, relationships, and parameters. Think of it like building a live digital equation rather than a static model: if you change one variable (like height, structural load, or curve radius), the entire design automatically recalculates, shifts, and adapts in real time.

For an object like the Echo Chair, a designer doesn't just sculpt a static curve. Instead, they define the mathematical relationship between the seat and the backrest. If you alter the height of the backrest, the program instantly adjusts the curvature of the seat to ensure the structural integrity and ergonomics remain flawless.

How Studios Like ZHA Leverage It

ZHA (formerly Zaha Hadid Architects) has been a global pioneer in this space, even helping coin the architectural movement known as Parametricism. They use advanced computational tools—most notably Rhino3D paired with Grasshopper—to push past the rigid constraints of traditional architecture.

Here is how that translates from theory into physical furniture and structures:

1. Materializing Complex, Fluid Forms

Traditional manufacturing relies on standard geometric shapes (cubes, cylinders, flat planes) because they are cheap to replicate. Parametric design breaks free from these constraints by allowing designers to model organic, undulating, and sculptural forms that mimic natural systems. Because the software manages the complex math behind double-curvature surfaces, studios can confidently design structures that look entirely fluid without worrying that the geometry is mathematically impossible to fabricate.

2. Optimizing Structural Performance (Topology Optimization)

Parametric software can run structural and environmental simulations directly inside the design script. For large-scale structures, the algorithm can analyze exactly where the highest stresses and forces will hit a building. It then automatically thickens the material in high-stress zones and thins it out where it isn't needed.

• In Architecture: This creates incredibly efficient, bone-like structural columns or sweeping canopies that use the absolute minimum amount of concrete or steel required.

• In Furniture: For the Echo Chair, it allowed ZHA to find the exact "shared structural edge" where the backrest and seat meet, ensuring the single continuous piece of 3D-printed plastic can easily support a person's weight without snapping.

3. Seamless Integration with Digital Fabrication

The beauty of a parametric model is that it generates pure, algorithmic data. This data can be fed directly into advanced robotic fabrication machinery, bypassing traditional blueprints entirely.

• When working with a brand like Nagami, the parametric code instructs the 3D-printing robotic arm exactly how to extrude the molten, recycled PET plastic in one continuous, layered path.

• On a construction site, this same data drives CNC milling machines, robotic stone cutters, or custom fabric molds, making the production of thousands of completely unique, non-standard panels both precise and highly feasible.

4. Environmental and Contextual Adaptation

On a structural scale, parameters can include environmental data like solar radiation, wind patterns, or acoustic requirements. For instance, a facade script can be programmed to read the angle of the sun throughout the day. The software will then automatically twist, angle, or resize thousands of individual louvers across a massive tower to maximize shade, reduce energy consumption, and optimize natural light—all while maintaining a cohesive, sweeping visual aesthetic.

In short, parametric design shifts the role of the designer from a traditional draftsman into a creator of systems. Studios like ZHA use it to ensure that even the most avant-garde, boundary-pushing concepts are rooted in strict structural logic and fluid efficiency.