Wallington, Greater London
Positive input ventilation (PIV) in Wallington
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Wallington and SM1, SM5 and SM6.
- From £950 inc VAT per home
- Free survey
Condensation in Wallington homes usually has one of two answers: better extract fans, or PIV as well.
We cover Wallington and the surrounding SM1, SM5 and SM6 postcodes as part of our work across Greater London. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Wallington at a glance
- Town
- Wallington, Greater London
- Postcode districts
- SM1, SM5 and SM6
- Nearby
- Carshalton (1 mile), St Helier (2 miles) and Sutton (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Wallington
| 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.
When to get it looked at
- 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
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 Wallington
What area around Wallington do you work in?
All of Greater London. Near Wallington that includes Carshalton, St Helier, Sutton and Belmont.
Will PIV make my house cold?
Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.
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.
Do you cover Wallington and nearby?
Yes. We cover Wallington and nearby places including Carshalton, St Helier, Sutton and Belmont. Send your postcode and we will confirm.
What is the price of a PIV unit in Wallington?
Guide prices for Wallington 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.
Get a PIV guide price for your Wallington home online, then confirm it on a free survey.
PIV near Wallington
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