King's Cross, Greater London
Positive input ventilation (PIV) in King's Cross
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering King's Cross and N1C, WC1H and WC1X.
- From £950 inc VAT per home
- Free survey
PIV can suit King's Cross houses and flats because it treats the whole home from one quiet unit.
Customers in King's Cross can get a guide price online in a couple of minutes. It uses London rates, which is what we would charge for the same job anywhere in Greater London. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in King's Cross at a glance
- Town
- King's Cross, Greater London
- Postcode districts
- N1C, WC1H and WC1X
- Nearby
- Barnsbury (1 mile), Holborn (1 mile) and Islington (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for King's Cross homes
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 King's Cross
| 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 King's Cross
What area around King's Cross do you work in?
All of Greater London. Near King's Cross that includes Barnsbury, Holborn, Islington 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 King's Cross and nearby?
Yes. We cover King's Cross and nearby places including Barnsbury, Holborn, Islington and Camden Town. Send your postcode and we will confirm.
What is the price of a PIV unit in King's Cross?
Guide prices for King's Cross 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 King's Cross home has a loft and we can price a PIV unit before visiting.
PIV near King's Cross
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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.