Belfast, County Antrim
Positive input ventilation (PIV) in Belfast
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Belfast and BT1, BT2 and BT7.
- From £725 inc VAT per home
- By arrangement
We fit loft and wall-mounted PIV units across Belfast, after checking the house first.
We cover Belfast and the surrounding BT1, BT2 and BT7 postcodes as part of our work across County Antrim. Because of the travel involved, visits here are by arrangement and travel is quoted before booking.
PIV in Belfast at a glance
- Town
- Belfast, County Antrim
- Postcode districts
- BT1, BT2 and BT7
- Nearby
- Castlereagh (2 miles), Newtownabbey (4 miles) and Holywood (5 miles)
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
How we approach PIV in Belfast
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 Belfast
| 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 |
Guide prices using Northern Ireland rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first. 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. We design to the Northern Ireland guidance and measure the airflow achieved.
Questions from Belfast
What area around Belfast do you work in?
All of County Antrim. Near Belfast that includes Castlereagh, Newtownabbey, Holywood and Dundonald.
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.
Do you cover Belfast and nearby?
Yes. We cover Belfast and nearby places including Castlereagh, Newtownabbey, Holywood and Dundonald. Send your postcode and we will confirm.
What is the price of a PIV unit in Belfast?
Guide prices for Belfast 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.
Most Belfast PIV jobs are done in half a day, so ask about the next available date.
PIV near Belfast
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