Home ventilation, Dyfed
Positive input ventilation (PIV) in Dyfed
Loft or wall units that gently push filtered air into the home to tackle condensation, across Dyfed.
- From £750 inc VAT per home
- Free survey
PIV can suit Dyfed houses and flats because it treats the whole home from one quiet unit.
Our team is based in Great Barr, Birmingham, and we work throughout Dyfed, from Milford Haven, Llanelli, Ammanford, Aberystwyth and Carmarthen. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in Dyfed at a glance
- Area
- Dyfed, Wales
- Towns listed
- 6, largest Llanelli
- Postcode districts
- SA61, SA62, SA71, SA72, SA14 and SA15
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we do it
PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
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 Dyfed
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £750–£1,325 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,600 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£280 inc VAT |
Wales rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Common reasons people call
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
Rules in Wales
In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. Extract rates and commissioning are checked against the Welsh guidance on every job.
How the job runs
- Survey
- Fixed quote
- Install
- Set up
- Hand over
Towns we cover in Dyfed
Questions about positive input ventilation (PIV) in Dyfed
Which towns in Dyfed do you cover?
All of Dyfed, including Milford Haven, Llanelli, Ammanford, Aberystwyth and Carmarthen. If your town is not listed, send the 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.
Are prices different in Dyfed?
Our guide prices are adjusted by region. In Dyfed we use Wales rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home.
Is the survey free in Dyfed?
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 Dyfed home has a loft and we can price a PIV unit before visiting.
Other services in Dyfed
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.