Airflow testing and commissioning in Somerset

Airflow testing measures how much air each fan or valve actually moves, using a calibrated flow hood, and records it against the required rates. It is how you prove a ventilation system works, and for new homes it is part of the building regulations.

Our team is based in Great Barr, Birmingham, and we work throughout Somerset, from Taunton, Yeovil, Bridgwater, Portishead and Frome. Visits for this work are charged, with the price agreed before we arrive.

Airflow testing in Somerset at a glance

Area: Somerset
Towns listed: 19, largest Bath
Postcode districts: BS22, BS23, TA1, TA2, BA20 and BA21
Price region: South West
Survey: Charged visit, price agreed first

How we do it

Approved Document F expects mechanical ventilation in new dwellings to be tested with a flow device that has been calibrated within the last 12 months, and the results recorded on a commissioning sheet. The person commissioning should be registered with a competent person scheme for ventilation or show evidence of competence; we tell you who will sign your sheet when we quote. Testing is also useful outside new builds: it shows landlords and homeowners whether existing fans meet the rates, and it is the first step in rebalancing an MVHR system that no longer feels right.

MVHR commissioning

Supply and extract at every valve measured and balanced.

Remedial advice

If a fan fails, we explain why and quote the fix.

Extract fan tests

Each fan measured and compared with the Part F rate for the room.

Guide prices in Somerset

Airflow testing and commissioning guide prices in Somerset
Work	Guide price
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£150–£305 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£255–£410 inc VAT
Rebalance and recommission an existing MVHR system (per system)	£255–£465 inc VAT

South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Signs it is time to call us

After MVHR or MEV installation by another company
A landlord file needs proof of ventilation
After rebalancing or extending a system

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

How the job runs

Book
Measure
Adjust
Record
Advise

Towns we cover in Somerset

Questions about airflow testing and commissioning in Somerset

Which rules apply to ventilation in Somerset?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

Can you test commercial systems?

Yes. We measure and balance commercial supply and extract systems too.

How much does ventilation airflow testing cost?

Testing up to six extract fans costs £145 to £295 including VAT, and commissioning a full MVHR or MEV system £245 to £395.

Which towns in Somerset do you cover?

All of Somerset, including Taunton, Yeovil, Bridgwater, Portishead and Frome. If your town is not listed, send the postcode and we will confirm.

Are prices different in Somerset?

Our guide prices are adjusted by region. In Somerset we use South West rates, so airflow testing and commissioning sheet for extract fans (up to 6 fans) is typically £150 to £305 inc VAT per home.