Working with architects on low-energy and MVHR projects

Airtightness — design and achievement

We don't just test airtightness — we design and build it. Our recent projects have achieved results as low as 0.22 m³/h.m² @ 50Pa, approaching Passivhaus standard. We provide membrane specifications, junction details and on-site supervision to ensure the design airtightness target is actually achieved, not just specified.

The Future Homes Standard airtightness target is 3 m³/h.m². Our recent projects achieve six to fourteen times better than that.

Why early involvement matters

MVHR duct routes are one of the most commonly under-coordinated elements in new build design. A system designed after the structural layout is fixed almost always involves compromises — longer duct runs, plant room locations that don't work, intake and exhaust positions that conflict with architectural intent.

We've resolved all of these on projects where we were brought in late. The projects where we're involved early are simpler, cheaper to build, and perform better.

MVHR

We work with architects at design stage — not as an afterthought. Whether you're specifying MVHR for a new build or coordinating fabric-first construction, early involvement produces better buildings and fewer site problems.

What we bring to the design team

• MVHR duct layout design from your drawings at RIBA Stage 2 or 3 — coordinated against structure, services and finishes before anything is committed to site

• Flow rate calculations to Part F, with room-by-room schedules your M&E consultant can work from

• Airtightness strategy and detailing — membrane specifications, junction details, service penetration schedules

• SAP10 input data for your energy assessor

• Single point of contact from design through to commissioning certificate