Harlesden, Greater London
Positive input ventilation (PIV) in Harlesden
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Harlesden and NW2, NW10 and W10.
- From £950 inc VAT per home
- Free survey
PIV can suit Harlesden houses and flats because it treats the whole home from one quiet unit.
Work in Harlesden follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Harlesden at a glance
- Town
- Harlesden, Greater London
- Postcode districts
- NW2, NW10 and W10
- Nearby
- Willesden (1 mile), Kensal Green (1 mile) and Queen's Park (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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 Harlesden
| 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 |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- 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 England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.
Questions from Harlesden
Is the survey free in Harlesden?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
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 Harlesden?
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 Harlesden do you work in?
All of Greater London. Near Harlesden that includes Willesden, Kensal Green, Queen's Park and Cricklewood.
Get a PIV guide price for your Harlesden home online, then confirm it on a free survey.
PIV near Harlesden
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