Positive input ventilation (PIV) in West Midlands

For a typical West Midlands semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

Across the West Midlands 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 West Bromwich, Birmingham, Coventry, Wolverhampton and Dudley.

PIV in the West Midlands at a glance

Area: West Midlands
Towns listed: 32, largest Birmingham
Postcode districts: WV12, DY1, DY4, WS2, WS3 and WV10
Price region: West Midlands
Survey: Free survey (UK mainland)

What the work involves

Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.

Heated PIV

A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.

Wall-mounted PIV for flats

Draws air from outside through an outside wall. Suits flats and homes with no loft space.

PIV with fan upgrades

PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.

Guide prices in the West Midlands

Positive input ventilation (PIV) guide prices in the West Midlands
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£795–£1,395 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£995–£1,695 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£145–£295 inc VAT

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

Signs it is time to call us

The house feels stuffy and damp rather than cold
Washing dried indoors makes everything worse
You have no loft but still need whole-flat ventilation (wall unit)

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

How the job runs

Survey
Fixed quote
Install
Set up
Hand over

Towns we cover in the West Midlands

Questions about positive input ventilation (PIV) in the West Midlands

Which rules apply to ventilation in the West Midlands?

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.

How much does PIV cost to run?

A standard PIV unit uses very little electricity, comparable to a low-energy light bulb on normal speed. A heated unit costs more in cold spells because the heater switches on when loft air is cold.

Will PIV make my house cold?

Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.

Which towns in the West Midlands do you cover?

All of the West Midlands, including West Bromwich, Birmingham, Coventry, Wolverhampton and Dudley. If your town is not listed, send the postcode and we will confirm.

Are prices different in the West Midlands?

Our guide prices are adjusted by region. In the West Midlands we use West Midlands rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £795 to £1,395 inc VAT per home.

Get a PIV guide price for your West Midlands home online, then confirm it on a free survey.

Positive input ventilation (PIV) in the West Midlands