Positive input ventilation (PIV) in Caerphilly

We fit loft and wall-mounted PIV units across Caerphilly, after checking the house first.

We cover Caerphilly and the surrounding CF14, CF15 and CF83 postcodes as part of our work across Gwent. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.

PIV in Caerphilly at a glance

Town: Caerphilly, Gwent
Postcode districts: CF14, CF15 and CF83
Nearby: Rhiwbina (3 miles), Whitchurch (4 miles) and Risca (6 miles)
Price region: Wales
Survey: Free survey (UK mainland)

How we approach PIV in Caerphilly

Loft air is usually a little warmer and drier than outside air, and the unit filters it before it comes down into the house. Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught.

Wall-mounted PIV for flats

Draws air from outside through an outside wall. Suits flats and homes with no loft space.

PIV with fan upgrades

PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.

Guide prices in Caerphilly

Positive input ventilation (PIV) guide prices in Caerphilly
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

Wales rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Common reasons people call

Musty smell in wardrobes or behind furniture
The house feels stuffy and damp rather than cold
Washing dried indoors makes everything worse

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 Caerphilly

Do you cover Caerphilly and nearby?

Yes. We cover Caerphilly and nearby places including Rhiwbina, Whitchurch, Risca and Pontypridd. Send your postcode and we will confirm.

Can PIV be fitted in a flat?

Yes. Flats without loft space use a wall-mounted PIV unit that draws air from outside through an outside wall.

How long does PIV installation take?

A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.

What is the price of a PIV unit in Caerphilly?

Guide prices for Caerphilly 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.

Is the survey free in Caerphilly?

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.

Book a free Caerphilly survey and we will say honestly whether PIV, extract fans or both are needed.