Trowbridge, Wiltshire
Positive input ventilation (PIV) in Trowbridge
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Trowbridge and BA13, BA14 and BA15.
- From £825 inc VAT per home
- Free survey
For a typical Trowbridge semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Whether the property is in the middle of Trowbridge or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
PIV in Trowbridge at a glance
- Town
- Trowbridge, Wiltshire
- Postcode districts
- BA13, BA14 and BA15
- Nearby
- Westbury (4 miles), Melksham (5 miles) and Neston (6 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we approach PIV in Trowbridge
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.
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 Trowbridge
| 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.
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
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.
Questions from Trowbridge
Do you cover Trowbridge and nearby?
Yes. We cover Trowbridge and nearby places including Westbury, Melksham, Neston and Bath. Send your postcode and we will confirm.
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.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
What is the price of a PIV unit in Trowbridge?
Guide prices for Trowbridge 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 Trowbridge?
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 Trowbridge home has a loft and we can price a PIV unit before visiting.
PIV near Trowbridge
More services in Trowbridge
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.