Brent, Greater London
Positive input ventilation (PIV) in Brent
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Brent and HA0, HA9, NW2 and NW9.
- From £950 inc VAT per home
- Free survey
PIV can suit Brent houses and flats because it treats the whole home from one quiet unit.
For positive input ventilation (PIV) in Brent, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
PIV in Brent at a glance
- Town
- Brent, Greater London
- Postcode districts
- HA0, HA9, NW2, NW9 and NW10
- Nearby
- Wembley (under a mile), Sudbury (1 mile) and Harrow on the Hill (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Brent
| 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
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
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 Brent
Is the survey free in Brent?
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.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
How much does PIV cost to install?
A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.
How do I get a price for a PIV unit in Brent?
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 Brent do you work in?
All of Greater London. Near Brent that includes Wembley, Sudbury, Harrow on the Hill and Harrow.
Book a free Brent survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Brent
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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.