Cardiff, South Glamorgan
Positive input ventilation (PIV) in Cardiff
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Cardiff and CF10, CF11 and CF24.
- From £750 inc VAT per home
- Free survey
PIV can suit Cardiff houses and flats because it treats the whole home from one quiet unit.
Work in Cardiff follows the rules for Wales and finishes with a written record of what was fitted and how it was set up.
PIV in Cardiff at a glance
- Town
- Cardiff, South Glamorgan
- Postcode districts
- CF10, CF11 and CF24
- Nearby
- Whitchurch (3 miles), Penarth (3 miles) and Rhiwbina (4 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we approach PIV in Cardiff
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.
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.
Guide prices in Cardiff
| 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.
Common reasons people call
- 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 Cardiff
How do I get a price for a PIV unit in Cardiff?
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 Cardiff do you work in?
All of South Glamorgan. Near Cardiff that includes Whitchurch, Penarth, Rhiwbina and Caerphilly.
Do you cover Cardiff and nearby?
Yes. We cover Cardiff and nearby places including Whitchurch, Penarth, Rhiwbina and Caerphilly. Send your postcode and we will confirm.
Book a free Cardiff survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Cardiff
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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.