Air Testing Certification
A commercial air test measures air leakage through the building envelope, demonstrates Part L compliance and helps reduce energy costs, heat loss and carbon emissions.
​
Better airtightness reduces heat loss, energy costs and carbon emissions while improving occupant comfort and overall building performance. The test can also identify leakage points that should be sealed before final handover.
​
Fast Turnaround
Prompt testing and certification to keep projects moving.
Experienced Professionals
Expert knowledge across virtually all commercial building types.
Compliance Focused
Accurate testing to meet Part L Building Regulations.
Competitive Pricing
Cost-effective rates with discounts for multiple units.
Energy Statements
What is a Air Test Certificate
Air tightness is a key component of a building's overall energy performance.
Excessive uncontrolled air leakage can increase heating and cooling demand, reduce occupant comfort and adversely affect the building's calculated energy performance.
​
British EPC provides independent air permeability testing for commercial developments, working alongside SBEM calculations and Part L assessments to provide a coordinated approach from design through to completion.
​
Part L Air Tightness Testing
Air tightness testing measures the amount of uncontrolled air leakage through the building envelope and establishes the building's air permeability rate, typically expressed as:
m³/(h·m²) @ 50 Pa
​
The achieved result can then be incorporated into the final as-built SBEM assessment, helping demonstrate compliance with the applicable requirements of Approved Document Part L.
​
Why Air Tightness Matters
​
Good air tightness can contribute to:
-
Reduced uncontrolled heat loss
-
Lower heating and cooling demand
-
Improved building energy performance
-
Improved BER and BPER results
-
Reduced operational energy consumption
-
Greater occupant comfort
-
Successful completion of the as-built Part L assessment
​
Design Stage Advice
Air tightness should be considered before construction is complete.
Where required, we can work alongside the project team during the design-stage SBEM assessment to establish the air permeability target required by the energy model.
​
This allows the design team and contractor to understand the required performance before the final test and can reduce the risk of compliance issues at completion.
​
Commercial & Non-Domestic Buildings
Our air tightness testing service is suitable for a wide range of commercial properties, including:
Offices • Retail • Industrial Units • Warehouses • Restaurants • Leisure • Healthcare • Education • Mixed-Use Developments
From individual commercial units to larger developments, our approach provides clear technical advice and efficient coordination with the project's energy assessment.
​
Air Testing & SBEM — One Coordinated Service
Where British EPC is undertaking the project's SBEM assessment, the final air test result can be incorporated directly into the as-built energy model, providing a streamlined route towards Part L completion.
​
SBEM Assessment → Air Tightness Test → As-Built Compliance → EPC
​
Nationwide Commercial Air Tightness Testing
We provide commercial air tightness testing and energy consultancy throughout the UK, supporting developers, contractors, architects, property professionals and building owners.
​
Our focus is simple: accurate testing, practical advice and a clear route to compliance.
Commercial Air Testing Without the Complication
Independent Testing. Part L Expertise. Fast Certification.
Contact British EPC today for a no-obligation quotation for your commercial air tightness testing requirements.