Positive input ventilation (PIV) in Devon

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

Across Devon 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 Bideford, Plymouth, Exeter, Paignton and Torquay.

PIV in Devon at a glance

Area: Devon
Towns listed: 21, largest Plymouth
Postcode districts: TQ2, PL1, PL3, EX1, EX2 and TQ2
Price region: South West
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.

PIV with fan upgrades

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

Loft-mounted PIV

The most common option for houses with a loft. Usually fitted in half a day.

Heated PIV

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

Guide prices in Devon

Positive input ventilation (PIV) guide prices in Devon
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£825–£1,450 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,025–£1,775 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£150–£305 inc VAT

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

Common reasons people call

You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter
Black mould on window reveals and in corners of bedrooms

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 Devon

Questions about positive input ventilation (PIV) in Devon

Are prices different in Devon?

Our guide prices are adjusted by region. In Devon we use South West rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,450 inc VAT per home.

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.

Can PIV be fitted in a flat?

Yes. Flats without loft space use a wall-mounted PIV unit that draws air from outside through an outside wall.

Is the survey free in Devon?

For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.

Which rules apply to ventilation in Devon?

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.

Most Devon PIV jobs are done in half a day, so ask about the next available date.