Holloway, Greater London
Positive input ventilation (PIV) in Holloway
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Holloway and N7, N19 and NW5.
- From £950 inc VAT per home
- Free survey
PIV can suit Holloway houses and flats because it treats the whole home from one quiet unit.
We cover Holloway and the surrounding N7, N19 and NW5 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 Holloway at a glance
- Town
- Holloway, Greater London
- Postcode districts
- N7, N19 and NW5
- Nearby
- Barnsbury (1 mile), Highbury (1 mile) and Archway (1 mile)
- 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.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Guide prices in Holloway
| 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 Holloway
What area around Holloway do you work in?
All of Greater London. Near Holloway that includes Barnsbury, Highbury, Archway and Camden Town.
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.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
Do you cover Holloway and nearby?
Yes. We cover Holloway and nearby places including Barnsbury, Highbury, Archway and Camden Town. Send your postcode and we will confirm.
What is the price of a PIV unit in Holloway?
Guide prices for Holloway 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.
Send a photo of your loft hatch area and landing ceiling for a quicker Holloway quote.
PIV near Holloway
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