Barnet, Greater London
Positive input ventilation (PIV) in Barnet
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Barnet and EN4, EN5, HA8 and N2.
- From £950 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Barnet, after checking the house first.
Whether the property is in the middle of Barnet or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
PIV in Barnet at a glance
- Town
- Barnet, Greater London
- Postcode districts
- EN4, EN5, HA8, N2 and N12
- Nearby
- New Barnet (1 mile), Totteridge (1 mile) and East Barnet (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Barnet homes
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 Barnet
| 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
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
Rules that apply in England
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). 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 Barnet
What area around Barnet do you work in?
All of Greater London. Near Barnet that includes New Barnet, Totteridge, East Barnet and Hadley Wood.
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.
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.
Do you cover Barnet and nearby?
Yes. We cover Barnet and nearby places including New Barnet, Totteridge, East Barnet and Hadley Wood. Send your postcode and we will confirm.
What is the price of a PIV unit in Barnet?
Guide prices for Barnet 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 Barnet home has a loft and we can price a PIV unit before visiting.
PIV near Barnet
More services in Barnet
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.