Devizes, Wiltshire
Positive input ventilation (PIV) in Devizes
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Devizes and SN10.
- From £825 inc VAT per home
- Free survey
PIV can suit Devizes houses and flats because it treats the whole home from one quiet unit.
Work in Devizes follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Devizes at a glance
- Town
- Devizes, Wiltshire
- Postcode districts
- SN10
- Nearby
- Calne (6 miles), Melksham (6 miles) and Chippenham (9 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we approach PIV in Devizes
Loft air is usually a little warmer and drier than outside air, and the unit filters it before it comes down into the house. 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.
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.
Guide prices in Devizes
| 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 |
Guide prices using South West rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
Rules that apply 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.
Questions from Devizes
What area around Devizes do you work in?
All of Wiltshire. Near Devizes that includes Calne, Melksham, Chippenham and Trowbridge.
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.
Do you cover Devizes and nearby?
Yes. We cover Devizes and nearby places including Calne, Melksham, Chippenham and Trowbridge. Send your postcode and we will confirm.
What is the price of a PIV unit in Devizes?
Guide prices for Devizes use South West rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,450 inc VAT per home. We confirm a fixed price in writing before any work starts.
Most Devizes PIV jobs are done in half a day, so ask about the next available date.
PIV near Devizes
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