AES Sustainability Consultants
Based in Tiverton, Devon · Covers England, Scotland and Wales Accreditation stated by provider: ATTMA, SITMA, Elmhurst, ECMK, TrustMark, BREEAM, PassivhausOwn websiteUK-wide
02 · Building Regulations · Part F
Ventilation commissioning
If a new home has mechanical ventilation, such as extract fans, continuous extract or MVHR, the air flow rates must be tested and the results given to building control. The same applies when mechanical ventilation is installed in an existing home as part of notifiable work.
DWGuide by Dan Wallis · Updated 27 September 2026
This guide covers the rules in England. See Wales, Scotland and Northern Ireland.
Who needs oneAnyone building a new home with extract fans or whole-house ventilation, and some work on existing homes
Who can do itA competent ventilation tester, often BPEC qualified
WhenAt completion; results to building control within 5 days of the final test
61 ventilation testers listed across the UK
Featured (paid) listings first, then A–Z · How we check listings
Find ventilation testers by region
London (17) South East (11) East of England (13) South West (7) West Midlands (8) East Midlands (6) Yorkshire and the Humber (6) North West (4) Northern Ireland (5)
National providers (29)
Air Testing UK Ltd
Based in Manchester · Covers Nationwide Accreditation stated by provider: iATS, BINDT, BPEC, AECBOwn websiteUK-wide
Airtight Testing Staffordshire
Based in Stoke-on-Trent · Covers Staffordshire and UK-wide Accreditation stated by provider: ATTMAOwn websiteUK-wide
ATSPACE
Based in Royston, Hertfordshire · Covers England and Wales Accreditation stated by provider: Elmhurst, NHER, SITMA, TrustMark, Passivhaus Trust (Patron), BPEC, BSRIA, Passivhaus Trust PatronOwn websiteUK-wide
Briary Energy
Based in Hatfield, Hertfordshire · Covers UK-wide Accreditation not yet checkedOwn websiteUK-wide
Build Energy
Based in UK (several offices) · Covers UK-wide Accreditation not yet checkedOwn websiteUK-wide
Building Energy Experts
Based in Bristol · Covers Nationwide Accreditation stated by provider: Elmhurst, ATTMA, TrustMark, Retrofit Academy (Corporate Member), Retrofit Academy Corporate Member, AECBOwn websiteUK-wide
Compliance 4 Buildings
Based in Hornchurch, Essex · Covers Nationwide (UK) Accreditation stated by provider: ATTMAOwn websiteUK-wide
Coventry Property Certification
Based in Coventry, West Midlands · Covers England and Wales Accreditation not yet checkedOwn websiteUK-wide
DAA Group
Based in London · Covers Nationwide across the UK Accreditation stated by provider: ATTMA, BPECOwn websiteUK-wide
E2 Specialist Consultants
Based in Birmingham office (head office Wakefield) · Covers Birmingham and 25+ West Midlands towns Accreditation stated by provider: SITMA, iATSOwn websiteUK-wide
Energy Counsel
Based in Manchester, Greater Manchester · Covers Manchester, the North West and nationwide Accreditation stated by provider: CIBSE, BPEC, iATS, SITMA, BREEAM, AECB, ConstructionlineOwn websiteUK-wide
Energytest
Based in Tunbridge Wells, Kent · Covers London and the South East; nationwide Accreditation stated by provider: ATTMAOwn websiteUK-wide
EnergyWise Services
Based in Belfast, Northern Ireland · Covers UK-wide (remote delivery available) Accreditation not yet checkedOwn websiteUK-wide
enevo
Based in Birstall, West Yorkshire · Covers UK-wide (national network of local assessors) Accreditation stated by provider: ATTMA, iATS, SITMA, Elmhurst, Stroma Certification, BREEAM, ABBEOwn websiteUK-wide
EPC Experts
Based in Coventry, West Midlands · Covers Coventry, Nuneaton, Rugby, Warwick and nationwide Accreditation not yet checkedOwn websiteUK-wide
Gradwell Group
Based in Doncaster, South Yorkshire · Covers England-wide Accreditation not yet checkedOwn websiteUK-wide
HA Acoustics
Based in Harlow, Essex · Covers East Anglia, London, South West and nationwide Accreditation stated by provider: UKAS, iATSOwn websiteUK-wide
Melin Energy Consultants
Based in Swansea · Covers UK-wide (offices in Swansea, Bristol and London) Accreditation stated by provider: Elmhurst (Approved Psi Value Competency Scheme), BREEAM AP, CIBSE, UK Thermography AssociationOwn websiteUK-wide
MES Building Solutions
Based in Newark, Nottinghamshire · Covers Throughout the UK (offices in Newark, London and Birmingham) Accreditation stated by provider: ATTMA, Elmhurst, AECB, TrustMarkOwn websiteUK-wide
MSAFE
Based in Bournemouth, Dorset · Covers Nationwide Accreditation stated by provider: UKAS (sound insulation testing)Own websiteUK-wide
Purple Energy Solutions
Based in UK (several offices) · Covers Nationwide Accreditation stated by provider: ATTMA, UKASOwn websiteUK-wide
QuinnRoss Energy
Based in Sittingbourne, Kent · Covers UK-wide, with a focus on Greater London and the South East Accreditation stated by provider: Elmhurst, UKAS, BRE Global, CIBSE Low Carbon Consultant, Low Carbon Energy AssessorOwn websiteUK-wide
SEES
Based in Durley, Southampton, Hampshire · Covers UK-wide Accreditation stated by provider: Elmhurst, ATTMA, BREEAM licensed assessor company, Stroma certifiedOwn websiteUK-wide
Southern Assessors
Based in Salisbury, Wiltshire · Covers UK-wide, with offices in London, Bristol and Birmingham Accreditation stated by provider: NHEROwn websiteUK-wide
Spratt + Hamer
Based in Liverpool · Covers England, Wales and Northern Ireland Accreditation stated by provider: UKAS (No. 4088), ATTMAOwn websiteUK-wide
Stroma Built Environment
Based in Wakefield, West Yorkshire · Covers UK-wide Accreditation stated by provider: UKAS (No. 2731), ATTMAOwn websiteUK-wide
UK Building Compliance
Based in Hinckley, Leicestershire · Covers UK-wide (England, Wales, Scotland and Northern Ireland) Accreditation stated by provider: ATTMA, Elmhurst, SITMA, BPEC, UKASOwn websiteUK-wide
Regional providers (check they cover your area) (1)
UKSAPS
Based in Royston, Hertfordshire · Coverage not stated, so check with the provider Accreditation not yet checkedOwn website
What gets tested
- Extract rates from kitchens, bathrooms and utility rooms
- Supply and extract rates for whole-house systems such as MVHR
- That controls, boost settings and filters are set up correctly
Deadlines and paperwork
The person carrying out the work must make sure the air flow rates are tested using the approved procedure, and give the results to building control no later than five days after the final test. The homeowner should also be given information on how to use and maintain the system.
In Wales, Scotland and Northern Ireland
This guide describes the rules in England. Building regulations are devolved, so here is how ventilation commissioning works in the rest of the UK.
Wales
The same as England: mechanical ventilation air flows are tested, and the results go to building control within 5 days of the final test. This also covers notifiable ventilation work in existing homes.
Scotland
Mechanical ventilation must be commissioned, with air flows measured at each fan or vent and recorded on a commissioning sheet. There is no national 5-day deadline, but building standards will want the evidence with the completion certificate.
Northern Ireland
Under Technical Booklet K, mechanical ventilation is commissioned and air flows are tested where practicable. The results go to the council within 5 days.
Common questions
Do trickle vents need testing?
No. Testing applies to mechanical ventilation. Trickle vents and other background ventilation are checked as part of the design.
Can my electrician do it?
Possibly, if they are competent to test and commission ventilation systems. Many firms use testers with a BPEC domestic ventilation qualification.
What gets tested?
Extract rates from kitchens, bathrooms and utility rooms, supply and extract rates for whole-house systems such as MVHR, and that controls, boost settings and filters are set up correctly.
When do the results go to building control?
No later than five days after the final test. The homeowner should also be given information on how to use and maintain the system.
New to the jargon? See our glossary of terms, from air permeability to TrustMark.