Northolt, Greater London
Positive input ventilation (PIV) in Northolt
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Northolt and HA2, UB5 and UB6.
- From £950 inc VAT per home
- Free survey
PIV can suit Northolt houses and flats because it treats the whole home from one quiet unit.
Customers in Northolt can get a guide price online in a couple of minutes. It uses London rates, which is what we would charge for the same job anywhere in Greater London. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in Northolt at a glance
- Town
- Northolt, Greater London
- Postcode districts
- HA2, UB5 and UB6
- Nearby
- Greenford (2 miles), South Ruislip (2 miles) and Sudbury (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Northolt
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £950–£1,675 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,200–£2,025 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £175–£355 inc VAT |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
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 England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Northolt
What area around Northolt do you work in?
All of Greater London. Near Northolt that includes Greenford, South Ruislip, Sudbury and Harrow on the Hill.
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.
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.
Do you cover Northolt and nearby?
Yes. We cover Northolt and nearby places including Greenford, South Ruislip, Sudbury and Harrow on the Hill. Send your postcode and we will confirm.
What is the price of a PIV unit in Northolt?
Guide prices for Northolt use London rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £950 to £1,675 inc VAT per home. We confirm a fixed price in writing before any work starts.
Tell us whether your Northolt home has a loft and we can price a PIV unit before visiting.
PIV near Northolt
More services in Northolt
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.