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Ventilation
Testing

Ventilation flow rate and system testing (Part F compliance)

What is Ventilation Testing?

Ventilation testing is a requirement under Part F of the Building Regulations, introduced in 2010 to ensure that new dwellings provide a safe and healthy indoor environment. Ventilation means removing stale or polluted air from a building and replacing it with fresh outdoor air.

This is vital for several reasons:

-to make sure there is enough outdoor air for occupants to breathe comfortably
-to dilute and remove airborne pollutants, odours, and particulates
-to control humidity and reduce the risk of mould growth
-to supply air for fuel-burning appliances

Without a compliant ventilation test, Building Control cannot sign off your project. Evidence of testing must be submitted as part of the final approval process.

For developers, contractors, and building owners, ventilation testing reduces the risk of failed inspections and costly delays. It also provides assurance that your property meets essential health and safety standards, creating comfortable living and working spaces. Pollutants and airflow needs vary between domestic, commercial, and industrial buildings, but the principle is the same: systems must be proven to work as intended.

At enevo, we carry out accredited testing using calibrated equipment, giving you clear, practical evidence of compliance while keeping projects efficient and on schedule.

Send us your project details and we’ll send a quote

Our ventilation testing services

Our service covers all requirements of Part F, delivered by BPEC-qualified engineers with UKAS-calibrated equipment. We can also combine ventilation testing with air tightness and sound testing to save time and costs.

Our ventilation testing includes:

Flow rate checks to confirm correct operation. Icon

Mechanical Ventilation and Heat Recovery (MVHR) testing

Flow rate checks to confirm correct operation.
Assessment of multi-point and centralised extract systems. Icon

Mechanical Extract Ventilation (MEV) testing

Assessment of multi-point and centralised extract systems.
For kitchens, bathrooms, toilets, and utility rooms. Icon

Intermittent extract fan testing

For kitchens, bathrooms, toilets, and utility rooms.
Measuring airflow in litres per second against the required standards (e.g. 6 l/s for toilets, 13 l/s for bathrooms, 60 l/s for kitchens without cooker hoods) required to pass Building Regulations Part F and are measured using calibrated anemometers. Icon

Room-specific flow rate assessments

Measuring airflow in litres per second against the required standards (e.g. 6 l/s for toilets, 13 l/s for bathrooms, 60 l/s for kitchens without cooker hoods) required to pass Building Regulations Part F and are measured using calibrated anemometers.
Results recorded and issued for submission to your Building Control Body. Icon

Compliance documentation

Results recorded and issued for submission to your Building Control Body.
Flow rate checks to confirm correct operation. Icon

Mechanical Ventilation and Heat Recovery (MVHR) testing

Flow rate checks to confirm correct operation.
Assessment of multi-point and centralised extract systems. Icon

Mechanical Extract Ventilation (MEV) testing

Assessment of multi-point and centralised extract systems.
For kitchens, bathrooms, toilets, and utility rooms. Icon

Intermittent extract fan testing

For kitchens, bathrooms, toilets, and utility rooms.
Measuring airflow in litres per second against the required standards (e.g. 6 l/s for toilets, 13 l/s for bathrooms, 60 l/s for kitchens without cooker hoods) required to pass Building Regulations Part F and are measured using calibrated anemometers. Icon

Room-specific flow rate assessments

Measuring airflow in litres per second against the required standards (e.g. 6 l/s for toilets, 13 l/s for bathrooms, 60 l/s for kitchens without cooker hoods) required to pass Building Regulations Part F and are measured using calibrated anemometers.
Results recorded and issued for submission to your Building Control Body. Icon

Compliance documentation

Results recorded and issued for submission to your Building Control Body.

Ventilation testing

01

Initial consultation
Share your project details with our team and receive a clear quote.

02

On-site testing
Our engineers attend site with calibrated anemometers to measure flow rates in line with Part F.

03

System checks
We verify performance of MVHR, MEV, and extractor fans against regulatory requirements.

04

Results and reporting
Full test results provided, with certification for Building Control submission.

05

Support and guidance
If adjustments are needed, we advise on the most practical and cost-effective route to compliance.
Why choose enevo for ventilation testing? Image
Why choose enevo for ventilation testing? Icon

Ventilation Testing

Why choose enevo for ventilation testing?

- Experienced, BPEC-qualified engineers delivering accurate and compliant results.

- Nationwide service with the option to combine testing for time and cost savings.

- Practical advice to resolve issues quickly, avoiding re-tests and delays.

- A track record of supporting developers, contractors, and self-builders across the UK.

- Fast turnaround and clear communication, ensuring Building Control approval without unnecessary stress.

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How ventilation is tested

Part F of the Building Regulations requires that MHVR Systems (Mechanical Ventilation and Heat Recovery), MEVs (Mechanical Extract Ventilation) and intermittent extractor fans undergo a flow rate test to ensure they are working efficiently. Evidence of this test must be passed to the Building Control Body (BCB) as part of their sign-off procedure.

The assessment of ventilation is undertaken using an anemometer which measures an air flow rate in l/s (litres per second). Different levels of flow rate are applied to different rooms according to their purpose and the equipment within them. A toilet, for example, requires an intermittent extract ventilation rate of 6 l/s, whereas a kitchen without a cooker hood would require one at 60 l/s. An office room with a photocopier would require an extract rate of 20 l/s.

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How ventilation is tested Image

How can we help you
with your project?

Testimonial IconTrusted, Time And Time Again

5 Star Rating

Harry gave me excellent advice and clear understanding on what BREEAM means as well about the specific accredited assessing required by professionals like Harry.

Angela Singh

5 Star Rating

Very efficient and professional service. Cant recommend enevo enough, glad I chose them for my project.

William Brannon

5 Star Rating

Very impressive on all aspects of energy calcs. Responsive and cost competitive. Highly recommended

Nick Spencer

5 Star Rating

enevo are always helpful, friendly and efficient in carrying out SAP calculations for our clients.

Lizzie Hicks

5 Star Rating

Dan at enevo has completed for us SBEM Calculations and EPC Certificates for 6 commercial units on an industrial estate. The cost of the works was very competitive and the service we received was second to none. With very limited time to get these works completed Dan worked round the clock (and into his annual leave!!) to ensure that our completion date was achieved with very little notice. Would highly recommend!

Mollie Belton

5 Star Rating

We have always found enevo to provide an excellent service in the preparation of SAP Calculations and Assessments as well as EPC Certificates for projects that they have worked on for us. They are also reasonably priced so we would certainly recommend them to anyone looking for this type of service.

Martin Booker

5 Star Rating

Used enevo from start to completion of our recent project of 2No. new builds. Services included SAP/EPC and property air testing. Great service, understanding of requirements and cost. Person friendly company and good with communication.

Mark Radcliffe

5 Star Rating

Very efficient, personal, professional service, with a quick report turnaround. Highly recommended if you're a self-builder trying to navigate the complexities of the latest regulations.

Edward Broadhead

5 Star Rating

Always efficient and prompt service, enevo are an asset to my company, having used their services on multiple developments I wouldn't hesitate to recommend them.

Mac Chappell

5 Star Rating

Great service with a fast turnaround. Communication was excellent throughout. Richard the engineer was polite and professional. Will certainly be using enevo again.

ECO PROPERTY DEVELOPMENTS LTD

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Ventilation Flow Rate & System Testing

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Ventilation Flow Rate & System Testing

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