Coulsdon, Greater London
Positive input ventilation (PIV) in Coulsdon
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Coulsdon and CR5, CR8 and SM7.
- From £950 inc VAT per home
- Free survey
PIV is often a good fix for Coulsdon homes with condensation on every window.
Whether the property is in the middle of Coulsdon 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 Coulsdon at a glance
- Town
- Coulsdon, Greater London
- Postcode districts
- CR5, CR8 and SM7
- Nearby
- Purley (2 miles), Kenley (2 miles) and Banstead (3 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Coulsdon
| 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.
Signs it is time to call us
- 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
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 Coulsdon
What area around Coulsdon do you work in?
All of Greater London. Near Coulsdon that includes Purley, Kenley, Banstead and Sanderstead.
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 Coulsdon and nearby?
Yes. We cover Coulsdon and nearby places including Purley, Kenley, Banstead and Sanderstead. Send your postcode and we will confirm.
What is the price of a PIV unit in Coulsdon?
Guide prices for Coulsdon 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 Coulsdon PIV jobs are done in half a day, so ask about the next available date.
PIV near Coulsdon
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