Harringay, Greater London
Positive input ventilation (PIV) in Harringay
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Harringay and N4, N8 and N15.
- From £950 inc VAT per home
- Free survey
PIV can suit Harringay houses and flats because it treats the whole home from one quiet unit.
We cover Harringay and the surrounding N4, N8 and N15 postcodes as part of our work across Greater London. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in Harringay at a glance
- Town
- Harringay, Greater London
- Postcode districts
- N4, N8 and N15
- Nearby
- St Ann's (under a mile), Stroud Green (1 mile) and Seven Sisters (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Harringay homes
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.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
Guide prices in Harringay
| 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
- 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 Harringay
What area around Harringay do you work in?
All of Greater London. Near Harringay that includes St Ann's, Stroud Green, Seven Sisters and Hornsey.
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.
Do you cover Harringay and nearby?
Yes. We cover Harringay and nearby places including St Ann's, Stroud Green, Seven Sisters and Hornsey. Send your postcode and we will confirm.
What is the price of a PIV unit in Harringay?
Guide prices for Harringay 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.
Most Harringay PIV jobs are done in half a day, so ask about the next available date.
PIV near Harringay
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