Lisburn, County Antrim
Positive input ventilation (PIV) in Lisburn
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Lisburn and BT17, BT27 and BT28.
- From £725 inc VAT per home
- By arrangement
PIV is often a good fix for Lisburn homes with condensation on every window.
We cover Lisburn and the surrounding BT17, BT27 and BT28 postcodes as part of our work across County Antrim. Visits here are by arrangement: we quote travel separately and in writing before you commit.
PIV in Lisburn at a glance
- Town
- Lisburn, County Antrim
- Postcode districts
- BT17, BT27 and BT28
- Nearby
- Belfast (7 miles), Castlereagh (7 miles) and Dundonald (11 miles)
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
PIV for Lisburn 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.
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 Lisburn
| 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.
Signs it is time to call us
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
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 Lisburn
What is the price of a PIV unit in Lisburn?
Guide prices for Lisburn 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.
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.
Is the survey free in Lisburn?
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.
How do I get a price for a PIV unit in Lisburn?
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.
Send a photo of your loft hatch area and landing ceiling for a quicker Lisburn quote.
PIV near Lisburn
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.