Airflow testing and commissioning in Hampshire

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 Hampshire 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 Eastleigh, Winchester, Southampton, Portsmouth and Basingstoke.

Airflow testing in Hampshire at a glance

Area: Hampshire
Towns listed: 34, largest Southampton
Postcode districts: PO9, PO10, PO1, PO4, SO18 and SO19
Price region: South East
Survey: Charged visit, price agreed first

What the work 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.

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 Hampshire

Airflow testing and commissioning guide prices in Hampshire
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

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

When to get it looked at

A landlord file needs proof of ventilation
After rebalancing or extending a system
Building control needs a commissioning sheet

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 Hampshire

Questions about airflow testing and commissioning in Hampshire

Is the survey free in Hampshire?

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.

What equipment is used?

A flow hood that fits over the fan or valve and measures airflow in litres a second, calibrated within the last 12 months.

What happens if a fan fails the test?

We explain the likely cause, such as an undersized fan or a crushed duct, and quote to fix it. Many failures are cheap to put right.

Which rules apply to ventilation in Hampshire?

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 Hampshire do you cover?

All of Hampshire, including Eastleigh, Winchester, Southampton, Portsmouth and Basingstoke. If your town is not listed, send the postcode and we will confirm.