Airflow testing and commissioning in Kent

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 Kent, from Maidstone, Gillingham, Chatham, Royal Tunbridge Wells and Folkestone. Servicing, testing and repair visits are charged, and we tell you the cost before booking.

Airflow testing in Kent at a glance

Area: Kent
Towns listed: 32, largest Maidstone
Postcode districts: ME19, CT9, CT10, ME14, ME15 and ME4
Price region: South East
Survey: Charged visit, price agreed first

What airflow testing and commissioning involves

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.

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.

MEV and dMEV commissioning

Trickle and boost rates measured and set.

Guide prices in Kent

Airflow testing and commissioning guide prices in Kent
Work	Guide price
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£160–£325 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£270–£435 inc VAT
Rebalance and recommission an existing MVHR system (per system)	£270–£490 inc VAT

Guide prices using South East rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

Common reasons people call

Fans seem weak and you want evidence
After MVHR or MEV installation by another company
A landlord file needs proof of ventilation

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

How the job runs

Book
Measure
Adjust
Record
Advise

Towns we cover in Kent

Questions about airflow testing and commissioning in Kent

Is the survey free in Kent?

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.

Is testing a legal requirement?

For new dwellings in England, mechanical ventilation must be commissioned and the results given to building control. For existing homes it is good practice and useful evidence.

How long does it take?

Most homes take under an hour; a full MVHR balance can take two to three hours.

Which rules apply to ventilation in Kent?

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.

Which towns in Kent do you cover?

All of Kent, including Maidstone, Gillingham, Chatham, Royal Tunbridge Wells and Folkestone. If your town is not listed, send the postcode and we will confirm.