Treharris, Mid Glamorgan
Positive input ventilation (PIV) in Treharris
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Treharris and CF45, CF46 and CF82.
- From £750 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Treharris, after checking the house first.
For positive input ventilation (PIV) in Treharris, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
PIV in Treharris at a glance
- Town
- Treharris, Mid Glamorgan
- Postcode districts
- CF45, CF46 and CF82
- Nearby
- Nelson (1 mile), Gelligaer (2 miles) and Mountain Ash (3 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we approach PIV in Treharris
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.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Guide prices in Treharris
| 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 |
Guide prices using Wales rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- 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
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 Treharris
How do I get a price for a PIV unit in Treharris?
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.
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.
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.
What area around Treharris do you work in?
All of Mid Glamorgan. Near Treharris that includes Nelson, Gelligaer, Mountain Ash and Bargoed.
Do you cover Treharris and nearby?
Yes. We cover Treharris and nearby places including Nelson, Gelligaer, Mountain Ash and Bargoed. Send your postcode and we will confirm.
Tell us whether your Treharris home has a loft and we can price a PIV unit before visiting.
PIV near Treharris
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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.