Air Leakage & Air Tightness Testing
Air leakage and air tightness testing in the UK — blower door testing of commercial units to Part L, with pass certificates and smoke-assisted leak tracing where a retest is needed.
About Air Leakage & Air Tightness Testing
Air leakage and air tightness testing in the UK — blower door testing of commercial units to Part L, with pass certificates and smoke-assisted leak tracing where a retest is needed.
Our air leakage & air tightness testing work in the UK is carried out to BESA TR/19 and SFG20 standards. We record pre- and post-clean surface deposit readings where applicable, airflow and static pressure, fan performance and access panel provision, and issue photographic evidence with every report.
We cover supply, extract and kitchen extraction ventilation, ductwork cleaning and installation, fire and volume control dampers, and system balancing for restaurants, hotels, schools, offices and industrial premises across the UK — scheduled out of hours where trading hours demand it.
Common issues include grease-laden kitchen extract ductwork, insufficient airflow and unbalanced systems, noisy or failed fans and belts, missing or inaccessible access hatches, blocked louvres and grilles, and damper faults that put you outside insurance and fire safety compliance.
What's Included in Air Leakage & Air Tightness Testing
- Blower door testing to ATTMA standards
- Part L air permeability certificates
- Smoke tracing to find leakage paths
- Free advisory retest guidance on failure
How Air Leakage & Air Tightness Testing Works
- 1
Get in touch
Call or book online for air leakage & air tightness testing anywhere in the UK. We confirm scope and a fixed price.
- 2
Engineer attends
An F-Gas registered HVAC engineer attends at the agreed time, fully equipped and qualified for the work.
- 3
Work completed & reported
Work is completed to manufacturer and industry standards (CIBSE, BESA, F-Gas) and you receive a written service report on the day.
Air Leakage & Air Tightness Testing: Quick Answer
We provide commercial air leakage and air tightness testing, including blower door testing to Part L, across London and the M25 area. Pass certificates are issued digitally on the day. Same-day and next-day appointments are available. Prices start from £395 + VAT per test, with fixed written quotes and no call-out fee.
Common Problems We Solve
Unsure if your commercial property meets air tightness standards?
We offer air leakage and air tightness testing for commercial units to Part L standards. Our service includes blower door testing, providing a pass certificate digitally on the day, ensuring compliance with building regulations.
Need to quickly identify and fix air leaks for retesting?
If your commercial unit requires retesting, we offer smoke-assisted leak tracing to pinpoint exact leakage points. This enables targeted repairs, improving efficiency and helping ensure your property achieves the necessary air tightness pass certificate.
Require prompt air tightness testing with clear pricing?
Our F-Gas certified engineers provide air leakage testing for commercial properties, with same-day or next-day appointments available. We offer fixed written quotes from £395 + VAT per test, ensuring transparent pricing with no call-out fee.
What People Ask About Air Leakage & Air Tightness Testing
How much does a commercial air tightness test cost?
Our air tightness testing for commercial units starts from £395 + VAT per test. We provide fixed written quotes with no call-out fee, ensuring transparency. Certificates are issued digitally on the day of the test, confirming compliance.
What is air barrier testing for commercial buildings?
Air barrier testing, or air tightness testing, assesses the air leakage of commercial units using blower door equipment. This ensures the building meets energy efficiency standards, such as Part L, and helps to identify points of air infiltration or exfiltration.
What is the standard for duct leakage testing?
While we specialise in whole-building air tightness testing for commercial units to Part L, specific duct leakage testing standards are different. Our service focuses on overall building envelope performance to meet regulatory requirements and issue pass certificates.
How can I check for air leakage in my commercial property?
We conduct professional air leakage testing using blower door equipment for commercial units. This method accurately measures the air permeability of your building, identifying drafts and energy loss. Smoke-assisted leak tracing is available if a retest is needed.
What is an acceptable air leakage rate for commercial units?
An acceptable air leakage rate for commercial units is determined by specific building regulations, primarily Part L. Our air tightness testing service assesses your property against these standards, aiming to provide a pass certificate upon successful completion.
Do you offer air leakage testing near me in London?
Yes, we provide air leakage and air tightness testing services across London and the wider M25 area, including Kent, Surrey, Essex, Hertfordshire, Berkshire, and Buckinghamshire. Our engineers are available 7 days a week, from 07:00 to 21:00.
How quickly can I get an air tightness test?
We offer same-day and next-day appointments for air tightness testing of commercial units. Our F-Gas certified engineers operate 7 days a week, from 07:00 to 21:00, ensuring swift service across London and the M25 area. Certificates are issued digitally on the day.
Key Terms
- Part L
- blower door testing
- smoke-assisted leak tracing
- F-Gas certified engineers
- pass certificates
- London
- M25
- Kent
- Surrey
- Essex
FAQs about Air Leakage & Air Tightness Testing
How much does air leakage & air tightness testing cost in the UK?+
Pricing for air leakage & air tightness testing in the UK depends on system size, access and equipment specification. We always provide a fixed written quote before any work starts.
What qualifications do your engineers hold for air leakage & air tightness testing?+
Every engineer is a directly employed, qualified commercial HVAC engineer working to BESA SFG20 and CIBSE standards, with the relevant safe-working, electrical and access qualifications for air leakage & air tightness testing in the UK.
How quickly can you attend in the UK?+
For most the UK jobs we attend the same day or next day. Emergency HVAC call-outs are available 24/7 across the UK and surrounding areas.
Do you provide a service report or certificate on completion?+
Yes — every visit ends with a full service report covering the readings taken and any parts fitted, plus an F-Gas logbook entry where refrigerant is involved and any applicable commissioning or compliance certificate.
Do you cover all sectors in the UK?+
Yes. We deliver air leakage & air tightness testing across offices, retail, restaurants, hotels, schools, hospitals, data centres and industrial sites in the UK and surrounding areas.
Related HVAC & Refrigeration Services
Our engineers can carry out any of the works below in the same visit across the UK.
Kitchen Extraction Cleaning & Service
TR/19 kitchen extraction cleaning in the UK — canopy, ductwork and extract fan deep clean with insurance-grade certificate. Eliminates grease-fire risk.
Ventilation System Installation
Commercial ventilation system installation in the UK — supply, extract, MVHR and fresh-air systems designed to Building Regs Part F and DW/144.
Evaporative Cooling Installation
Evaporative cooling installation in the UK — low-energy cooling for warehouses, factories and large open spaces. Up to 80% less energy than DX cooling.
Commercial Ventilation Repair
Commercial ventilation repair in the UK — extract fan failures, noisy ductwork, blocked grilles, leaking acoustic seals. Diagnosed and fixed first visit where possible.
Extractor Fan Installation
Commercial extractor fan installation in the UK — kitchen, toilet, plant room and warehouse fans sized, supplied and installed with safe electrical termination.
Fresh Air Ventilation Systems
Fresh air ventilation systems in the UK — bring filtered outside air into offices, gyms and meeting rooms to meet Part F and improve indoor air quality.
Ready to Book Your Air Leakage & Air Tightness Testing?
Book a air leakage & air tightness testing, maintenance visit or inspection with our commercial HVAC engineers.
- ✓ Qualified Commercial HVAC Engineers
From £395 + VAT per test