Background Ventilation Testing

Thorough, reliable testing every time

Egni Energy Solutions provides professional Background Ventilation Testing (BVT) for PAS 2035 retrofit projects across North Wales.

As retrofit measures improve airtightness and thermal performance, ensuring adequate background ventilation becomes a key compliance requirement. Our role is to provide clear, independent verification that the dwelling can adequately breathe following improvement works.

This service is separate from extractor fan flow rate testing. It focuses specifically on whole-dwelling background ventilation provision within retrofit environments.

With experienced air tightness engineers and the latest Pulse 2.0 testing equipment, we understand how retrofit changes affect overall building performance — not just ventilation in isolation.

We work alongside retrofit installers to help projects progress smoothly to sign-off.

Built for Retrofit Delivery

We understand the realities of PAS 2035 projects — funding deadlines, audit scrutiny and programme pressures.

Our Background Ventilation Testing service provides:

• Independent verification for PAS 2035 documentation
• Clear, audit-ready reporting suitable for Retrofit Coordinators
• Rapid scheduling to avoid programme delays
• Straightforward feedback if minor improvements are needed

Our engineers are experienced in both airtightness and building performance testing, giving us a practical understanding of how insulation and draught-proofing measures impact airflow within a dwelling.

If properties have a history of mould or condensation, our assessment provides reassurance that ventilation has been properly considered post-retrofit.

Modern Equipment. Experienced Engineers.

We invest in the latest testing technology — including the most up-to-date Pulse 2.0 system — alongside calibrated diagnostic equipment to provide accurate, repeatable results.

Combined with our background in air permeability testing, this gives installers confidence that ventilation performance is being assessed by engineers who understand the wider building physics of retrofit.

Professional, efficient and respectful within occupied homes — we represent your project well on site.

Background Ventilation Testing from us…

Why work with Egni Energy Solutions?

• Experienced PAS 2035 retrofit testing partner
• Latest Pulse 2.0 equipment
• Qualified, experienced air tightness engineers
• Clear, scheme-ready documentation
• Responsive scheduling across North Wales
• Competitive rates for multi-property programmes

If you're delivering PAS 2035 projects and need a reliable testing partner who understands retrofit pressures, we’re ready to support your programme.