Extract Ventilation Testing & Commissioning

What is extract ventilation testing?

Extract ventilation testing or as it is commonly known as either Part F testing, vent testing or extractor fan testing is carried out to confirm the flow rate of the installed ventilation fans or system as required by Part F of the Building Regulations. The results will be required by your building control officer and any warranty or NHBC inspectors.

The onsite vent test measures the actual volume of air the extractor fans or ventilation system extracts in litres per second (l/s). The testing is non-destructive and usually takes up to 1 hour to complete for a single dwelling with the results being confirmed immediately onsite and the certificate issued same day.

Our experienced engineers are able to assist you before, during and after the ventilation extract test. Should an extract fan test fail our engineers can assist you to rectify the problem or suggest relevant remedial work to resolve the problem.

combine your vent test with

your air test and save £££'s

Vent testing expalined?

Want to know more about extract ventilation testing, get the complete low down on the why, how and what. To learn more click here and see our vent testing explained guide.

Extractor Fan Testing

  • 10 years vent testing experience 

  • Instant onsite test results

  • Sameday certificate issue

  • Free pre-test checklists

  • Free pre-test telephone support

  • Free sameday re-test in the event of a failure

  • BPEC certified & UKAS calibrated equipment

 

What are the requirements for ventilation testing in Part F?

The purpose of the testing is to ensure the correct flow rates have been achieved for the different room types dependent on the system type installed. For guidance on flow rates see below our summary of Part F requirements.

System 1 - Intermittent extract fans and background trickle vents

Minimum Extract Flow Rates

Kitchens (over hob) = 30 l/s

Kitchens (not over hob) = 60l/s

W/C's = 6l/s

Bathrooms = 15l/s

Utility Rooms = 30l/s

System 2 - Passive stack ventilation (PSV) (by specialist by design)

System 3 - Continuous mechanical extract (MEV)

Minimum Extract Flow Rates

Trickle Rate = by design based on number of occupants and property size

Minimum Boost Rates

Kitchens = 13l/s

W/C's = 6l/s

Bathrooms = 8l/s

Utility Rooms = 8l/s

System 4 - Continuous mechanical supply and extract with heat recovery (MVHR)

Minimum Supply & Extract Flow Rates

Trickle Rate = by design based on number of occupants and property size

Minimum Boost Rates

Kitchens = 13l/s

W/C's = 6l/s

Bathrooms = 8l/s

Utility Rooms = 8l/s

Want to know more about extract ventilation testing, get the complete low down on the why, how and what. To learn more click here.

Why Use BEAT?

BEAT Solutions are registered members of iATS scheme which means all our staff are able to provide certificates which are guaranteed to be accepted by all local building control inspectors. All our testing equipment is annually UKAS calibrated to ensure measure accuracy.

Very professional advice, friendly prompt service. Quick delivery of all certificates needed to complete building project.

B Foster - Farnham

When should I have my air test?


The air test should be conducted once all the building works are complete, this includes painting, decorating and floor coverings. Don't rush and get your air test too early. This increases the likelihood of a failure. We have a saying here at BEAT Solutions to establish whether the building is fit for testing. "would you let a paying customer move in yet?" If you can answer yes to this simple question, then it's is likely the building is ready.




How long quickly to i get my result and certificate?


The air test result is calculated onsite and for all air tests completed before 4pm we issue the certificate the same day via email.




What do we need to undertake an air test?


We require drawings including floor plans, sections, elevations and site plan to enable us to calculate the buildings envelope area. Additionally we'll require a copy of the design stage SAP calculation to establish the assumed air permeability score.




What happens if my air test score is too high and fails?


We are focused on helping all projects succeed. Therefore if your test fails we'll identify the areas that are leaking using the latest diagnostic equipment and techniques. We'll then allow yon upto 30 minutes remedial time to resolve the problematic areas and will re-test again for FREE. This is usually sufficient for most projects to achieve the required pass result. If for whatever reason the remedial works aren't to be completed during our visit, then a separate rechargeable retest will be required.




How to i get a quote?


Just send us your project drawings via email to info@beatsolutions.co.uk or use our quote request form and we'll send you an electronic quote by return.




How long does an air test take?


Depending on the size of the building the following can be used as a guide:- Small house or flat = upto 1.5hrs Large House = upto 2hrs Small commercial units i.e office, shop = upto 2hrs Medium commercial units i.e carehome, school = upto 4hrs Large commercial units i.e office blocks, hotels = upto 6hrs




Can you test multiple plots or units on the sameday?


Yes, generally as a guide we can test upto 10 plots in a single visit. For large volume projects we can test over multiple days if required.




What about my extractor fans and trickle vents?


The purpose of the test is to measure the amount of uncontrolled air movement. Therefore you are required to temporarily seal all extract ventilation fans including whole house ventilation systems. Also all trickle vents are closed, these can be temporarily sealed by the customer if you'd prefer. For further guidance on preparing for an air test see our site readiness checklist.





Frequently Asked Questions