Home ventilation, Cornwall
Positive input ventilation (PIV) in Cornwall
Loft or wall units that gently push filtered air into the home to tackle condensation, across Cornwall.
- From £825 inc VAT per home
- Free survey
PIV can suit Cornwall houses and flats because it treats the whole home from one quiet unit.
Cornwall has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.
PIV in Cornwall at a glance
- Area
- Cornwall
- Towns listed
- 10, largest Redruth
- Postcode districts
- PL11, TR12, TR13, TR14, TR15 and TR3
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we do it
Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught. 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.
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 Cornwall
| 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 |
South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
When to get it looked at
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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
- Survey
- Fixed quote
- Install
- Set up
- Hand over
Towns we cover in Cornwall
Questions about positive input ventilation (PIV) in Cornwall
Is the survey free in Cornwall?
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.
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.
Which rules apply to ventilation in Cornwall?
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 Cornwall do you cover?
All of Cornwall, including Newquay, Penzance, Bodmin, Redruth and Falmouth. If your town is not listed, send the postcode and we will confirm.
Send a photo of your loft hatch area and landing ceiling for a quicker Cornwall quote.
Other services in Cornwall
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.