Warminster, Wiltshire
Positive input ventilation (PIV) in Warminster
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Warminster and BA12 and BA13.
- From £825 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Warminster, after checking the house first.
We cover Warminster and the surrounding BA12 and BA13 postcodes as part of our work across Wiltshire. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in Warminster at a glance
- Town
- Warminster, Wiltshire
- Postcode districts
- BA12 and BA13
- Nearby
- Westbury (4 miles), Frome (6 miles) and Trowbridge (8 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
PIV for Warminster homes
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.
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 Warminster
| 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
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
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 Warminster
What is the price of a PIV unit in Warminster?
Guide prices for Warminster 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.
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 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.
Is the survey free in Warminster?
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 do I get a price for a PIV unit in Warminster?
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.
We will check the existing fans in your Warminster home at the same visit, because PIV works best with them working.
PIV near Warminster
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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.