Gorseinon, West Glamorgan
Positive input ventilation (PIV) in Gorseinon
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Gorseinon and SA2, SA4 and SA5.
- From £750 inc VAT per home
- Free survey

For a typical Gorseinon semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Gorseinon is about 109 miles from our base in Great Barr, Birmingham. We book Gorseinon visits by appointment and confirm the date in writing. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Gorseinon at a glance
- Town
- Gorseinon, West Glamorgan
- Postcode districts
- SA2, SA4 and SA5
- Nearby
- Llanelli (5 miles), Swansea (5 miles) and Clydach (6 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
PIV for Gorseinon homes
Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls.
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 Gorseinon
| 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 |
These ranges use our Wales 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 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.
Questions from Gorseinon
How do I get a price for a PIV unit in Gorseinon?
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.
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.
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.
What area around Gorseinon do you work in?
All of West Glamorgan. Near Gorseinon that includes Llanelli, Swansea, Clydach and Ammanford.
Do you cover Gorseinon and nearby?
Yes. We cover Gorseinon and nearby places including Llanelli, Swansea, Clydach and Ammanford. Send your postcode and we will confirm.
Most Gorseinon PIV jobs are done in half a day, so ask about the next available date.
PIV near Gorseinon
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.