Carmarthen, Dyfed
Positive input ventilation (PIV) in Carmarthen
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Carmarthen and SA31 and SA33.
- From £750 inc VAT per home
- Free survey
Condensation in Carmarthen homes usually has one of two answers: better extract fans, or PIV as well.
We cover Carmarthen and the surrounding SA31 and SA33 postcodes as part of our work across Dyfed. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Carmarthen at a glance
- Town
- Carmarthen, Dyfed
- Postcode districts
- SA31 and SA33
- Nearby
- Llanelli (14 miles), Ammanford (14 miles) and Gorseinon (17 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
What the work involves
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 Carmarthen
| 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
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. We design to the Welsh rates and commission mechanical systems so the results can be recorded.
Questions from Carmarthen
What is the price of a PIV unit in Carmarthen?
Guide prices for Carmarthen use Wales rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home. We confirm a fixed price in writing before any work starts.
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.
Is the survey free in Carmarthen?
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 Carmarthen?
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.
Book a free Carmarthen survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Carmarthen
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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.