Coleraine, County Londonderry
Positive input ventilation (PIV) in Coleraine
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Coleraine and BT52, BT55 and BT56.
- From £725 inc VAT per home
- By arrangement

Condensation in Coleraine homes usually has one of two answers: better extract fans, or PIV as well.
Whether the property is in the middle of Coleraine or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
PIV in Coleraine at a glance
- Town
- Coleraine, County Londonderry
- Postcode districts
- BT52, BT55 and BT56
- Nearby
- Limavady (13 miles) and Ballymena (24 miles)
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
PIV for Coleraine homes
Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls.
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 Coleraine
| 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.
When to get it looked at
- 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. We design to the Northern Ireland guidance and measure the airflow achieved.
Questions from Coleraine
Is the survey free in Coleraine?
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.
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.
How do I get a price for a PIV unit in Coleraine?
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.
What area around Coleraine do you work in?
All of County Londonderry. Near Coleraine that includes Limavady and Ballymena.
Send a photo of your loft hatch area and landing ceiling for a quicker Coleraine quote.
PIV near Coleraine
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