Positive input ventilation (PIV) in Dundonald

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

For positive input ventilation (PIV) in Dundonald, 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 Dundonald at a glance

Town: Dundonald, County Down
Postcode districts: BT4, BT5 and BT16
Nearby: Holywood (3 miles), Castlereagh (4 miles) and Newtownards (4 miles)
Price region: Northern Ireland
Survey: By arrangement, travel quoted first

PIV for Dundonald homes

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.

Loft-mounted PIV

The most common option for houses with a loft. Usually fitted in half a day.

Heated PIV

A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.

Guide prices in Dundonald

Positive input ventilation (PIV) guide prices in Dundonald
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£725–£1,275 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£925–£1,550 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£135–£270 inc VAT

Northern Ireland rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job. Travel is quoted separately for this area.

Common reasons people call

You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter
Black mould on window reveals and in corners of bedrooms

Rules that apply in Northern Ireland

In Northern Ireland, ventilation is covered by the Building Regulations (Northern Ireland) and Technical Booklet K. Extract rates follow the Northern Ireland guidance and are measured at handover.

Questions from Dundonald

Do you cover Dundonald and nearby?

Yes. We cover Dundonald and nearby places including Holywood, Castlereagh, Newtownards and Belfast. Send your postcode and we will confirm.

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 is the price of a PIV unit in Dundonald?

Guide prices for Dundonald use Northern Ireland rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £725 to £1,275 inc VAT per home. We confirm a fixed price in writing before any work starts.

Is the survey free in Dundonald?

Visits here are by arrangement. Because of the ferry or long travel involved, we quote travel separately and in writing before you commit, and we can often combine visits to keep the cost down.

Most Dundonald PIV jobs are done in half a day, so ask about the next available date.