Penarth, South Glamorgan
Positive input ventilation (PIV) in Penarth
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Penarth and CF10, CF11 and CF64.
- From £750 inc VAT per home
- Free survey

If your Penarth flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Whether the property is in the middle of Penarth 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 Penarth at a glance
- Town
- Penarth, South Glamorgan
- Postcode districts
- CF10, CF11 and CF64
- Nearby
- Cardiff (3 miles), Whitchurch (5 miles) and Barry (6 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
PIV for Penarth homes
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.
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 Penarth
| 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.
Signs it is time to call us
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
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 Penarth
How do I get a price for a PIV unit in Penarth?
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 long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
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.
What area around Penarth do you work in?
All of South Glamorgan. Near Penarth that includes Cardiff, Whitchurch, Barry and Rhiwbina.
Do you cover Penarth and nearby?
Yes. We cover Penarth and nearby places including Cardiff, Whitchurch, Barry and Rhiwbina. Send your postcode and we will confirm.
We will check the existing fans in your Penarth home at the same visit, because PIV works best with them working.
PIV near Penarth
More services in Penarth
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.