Calne, Wiltshire
Positive input ventilation (PIV) in Calne
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Calne and SN11 and SN15.
- From £825 inc VAT per home
- Free survey
PIV can suit Calne houses and flats because it treats the whole home from one quiet unit.
Work in Calne follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Calne at a glance
- Town
- Calne, Wiltshire
- Postcode districts
- SN11 and SN15
- Nearby
- Chippenham (5 miles), Devizes (6 miles) and Melksham (7 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
What the work involves
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 Calne
| 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
- 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 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 Calne
Is the survey free in Calne?
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 long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
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.
How do I get a price for a PIV unit in Calne?
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 Calne do you work in?
All of Wiltshire. Near Calne that includes Chippenham, Devizes, Melksham and Corsham.
We will check the existing fans in your Calne home at the same visit, because PIV works best with them working.
PIV near Calne
More services in Calne
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.