Chippenham, Wiltshire
Positive input ventilation (PIV) in Chippenham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Chippenham and SN13, SN14 and SN15.
- From £825 inc VAT per home
- Free survey
Condensation in Chippenham homes usually has one of two answers: better extract fans, or PIV as well.
We cover Chippenham and the surrounding SN13, SN14 and SN15 postcodes as part of our work across Wiltshire. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Chippenham at a glance
- Town
- Chippenham, Wiltshire
- Postcode districts
- SN13, SN14 and SN15
- Nearby
- Corsham (3 miles), Neston (5 miles) and Calne (5 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
PIV for Chippenham homes
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.
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.
Guide prices in Chippenham
| 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
- 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
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). 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.
Questions from Chippenham
Do you cover Chippenham and nearby?
Yes. We cover Chippenham and nearby places including Corsham, Neston, Calne and Melksham. Send your postcode and we will confirm.
How much does PIV cost to run?
A standard PIV unit uses very little electricity, comparable to a low-energy light bulb on normal speed. A heated unit costs more in cold spells because the heater switches on when loft air is cold.
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.
What is the price of a PIV unit in Chippenham?
Guide prices for Chippenham 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.
Is the survey free in Chippenham?
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.
Tell us whether your Chippenham home has a loft and we can price a PIV unit before visiting.
PIV near Chippenham
More services in Chippenham
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.