St Austell, Cornwall
Positive input ventilation (PIV) in St Austell
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering St Austell and PL24, PL25 and PL26.
- From £825 inc VAT per home
- Free survey
Condensation in St Austell homes usually has one of two answers: better extract fans, or PIV as well.
St Austell is about 196 miles from our base in Great Barr, Birmingham. We book St Austell visits by appointment and confirm the date in writing. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in St Austell at a glance
- Town
- St Austell, Cornwall
- Postcode districts
- PL24, PL25 and PL26
- Nearby
- Bodmin (9 miles), Truro (14 miles) and Newquay (14 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we approach PIV in St Austell
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.
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 St Austell
| 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
- 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 that apply 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.
Questions from St Austell
Is the survey free in St Austell?
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.
How much does PIV cost to install?
A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
How do I get a price for a PIV unit in St Austell?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
What area around St Austell do you work in?
All of Cornwall. Near St Austell that includes Bodmin, Truro, Newquay and Falmouth.
Most St Austell PIV jobs are done in half a day, so ask about the next available date.
PIV near St Austell
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.