Chelsea, Greater London
Positive input ventilation (PIV) in Chelsea
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Chelsea and SW3, SW7 and SW10.
- From £950 inc VAT per home
- Free survey
PIV is often a good fix for Chelsea homes with condensation on every window.
We cover Chelsea and the surrounding SW3, SW7 and SW10 postcodes as part of our work across Greater London. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Chelsea at a glance
- Town
- Chelsea, Greater London
- Postcode districts
- SW3, SW7 and SW10
- Nearby
- Battersea (1 mile), Queenstown (1 mile) and Knightsbridge and Belgravia (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Chelsea homes
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.
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 Chelsea
| 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 |
London rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Signs it is time to call us
- 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
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Chelsea
Do you cover Chelsea and nearby?
Yes. We cover Chelsea and nearby places including Battersea, Queenstown, Knightsbridge and Belgravia and Latchmere. Send your postcode and we will confirm.
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.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
What is the price of a PIV unit in Chelsea?
Guide prices for Chelsea 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.
Is the survey free in Chelsea?
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.
Book a free Chelsea survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Chelsea
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