Positive input ventilation (PIV) in Clwyd

PIV is often a good fix for Clwyd homes with condensation on every window.

Across Clwyd the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Flint, Rhyl, Hawarden, Rhosllannerchrugog and Wrexham.

PIV in Clwyd at a glance

Area: Clwyd, Wales
Towns listed: 13, largest Wrexham
Postcode districts: LL18, LL22, CH5, CH6, LL11 and LL12
Price region: Wales
Survey: Free survey (UK mainland)

What positive input ventilation (PIV) involves

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. Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole.

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.

PIV with fan upgrades

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

Guide prices in Clwyd

Positive input ventilation (PIV) guide prices in Clwyd
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.

When to get it looked at

Washing dried indoors makes everything worse
You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter

Rules 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.

How the job runs

Survey
Fixed quote
Install
Set up
Hand over

Towns we cover in Clwyd

Questions about positive input ventilation (PIV) in Clwyd

Which towns in Clwyd do you cover?

All of Clwyd, including Flint, Rhyl, Hawarden, Rhosllannerchrugog and Wrexham. If your town is not listed, send the postcode and we will confirm.

Will PIV make my house cold?

Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.

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.

Are prices different in Clwyd?

Our guide prices are adjusted by region. In Clwyd we use Wales rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home.

Is the survey free in Clwyd?

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 Clwyd survey and we will say honestly whether PIV, extract fans or both are needed.