Airflow testing and commissioning in Gwent

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.

Across Gwent the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Blackwood, Newport, Cwmbran, Pontypool and Ebbw Vale.

Airflow testing in Gwent at a glance

Area: Gwent, Wales
Towns listed: 17, largest Newport
Postcode districts: NP4, NP13, NP13, NP22, CF14 and CF15
Price region: Wales
Survey: Charged visit, price agreed first

What the work involves

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.

MEV and dMEV commissioning

Trickle and boost rates measured and set.

MVHR commissioning

Supply and extract at every valve measured and balanced.

Remedial advice

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

Guide prices in Gwent

Airflow testing and commissioning guide prices in Gwent
Work	Guide price
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£140–£280 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£235–£375 inc VAT
Rebalance and recommission an existing MVHR system (per system)	£235–£425 inc VAT

These ranges use our Wales rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

When to get it looked at

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

Rules in Wales

In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. Extract rates and commissioning are checked against the Welsh guidance on every job.

How the job runs

Book
Measure
Adjust
Record
Advise

Towns we cover in Gwent

Questions about airflow testing and commissioning in Gwent

Are prices different in Gwent?

Our guide prices are adjusted by region. In Gwent we use Wales rates, so airflow testing and commissioning sheet for extract fans (up to 6 fans) is typically £140 to £280 inc VAT per home.

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.

Is the survey free in Gwent?

This is a charged visit because it is servicing, testing or repair work. We tell you the cost before booking. Surveys for new installations on the UK mainland are free.

Which rules apply to ventilation in Gwent?

In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.