UK Company Vench Moves Beyond Net Zero —Rethinking the Indoor Environment

United Kingdom, February 22, 2026 -- UK Founder Launches PASSAIR™ — A New Framework Extending Passivhaus Thinking Into Indoor Ecology

For more than three decades, Passivhaus and high-performance building standards have transformed architecture by solving energy loss, airtightness and thermal performance.

Now, a UK founder is proposing the next evolutionary step.

Richard Greenwood today announces the launch of PASSAIR™, a new framework focused on internal ecological performance in airtight buildings.

“Energy efficiency was the first revolution in building design,” says Greenwood. “Internal ecology is the next.”

PASSAIR™ does not challenge Passivhaus principles — it extends them.

While modern buildings have been optimised for energy retention and controlled ventilation, little attention has been given to how ultra-stable, highly controlled indoor environments influence particulate behaviour, microbial settlement patterns and long-term environmental balance.

“Air is the largest surface inside any building,” Greenwood explains. “It influences every other surface. Yet we treat it as empty space.”

PASSAIR™ reframes indoor air as part of a living internal system rather than simply something to move, filter or dilute.

From Energy Physics to Biological Physics

The framework introduces the concept of internal ecological dynamics — how particles move, where microflora settle, and how stability forms within airtight architectural systems.

Alongside PASSAIR™, two applied components form part of the broader indoor ecological architecture:

• AtmosField™ — a passive, architectural approach to particulate stabilisation within defined treatment zones.
• Probacterial® — a correction in language and approach to microbial balance on surfaces, shifting from sterilisation toward stabilisation.

Together, they represent a move beyond sterility and toward environmental balance.

“Passivhaus solved energy performance. The next question is biological performance,” Greenwood adds.

A Shift in How We Interact With Indoor Environments

As buildings become increasingly airtight and mechanically controlled, the importance of internal ecological stability grows.

Rather than positioning this as a new category of mechanical air purification, PASSAIR™ proposes a reframing:

From control to balance.
From sterilisation to stabilisation.
From fighting nature to working with it.

The launch signals what Greenwood describes as “the beginning of indoor ecology as a recognised design discipline.”

For media enquiries, interviews or further information: https://vench.co.uk

LinkedIn: https://www.linkedin.com/in/richard-greenwood-92946133/

Contact Info:
Name: Richard Greenwood
Email: Send Email
Organization: PASSAIR
Website: https://passair.co.uk

Release ID: 89183929