Richmond, Greater London
Positive input ventilation (PIV) in Richmond
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Richmond and SW13, SW14, TW1 and TW10.
- From £950 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Richmond, after checking the house first.
We cover Richmond and the surrounding SW13, SW14, TW1 and TW10 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 Richmond at a glance
- Town
- Richmond, Greater London
- Postcode districts
- SW13, SW14, TW1, TW10 and TW11
- Nearby
- Kew (2 miles), East Sheen (2 miles) and Brentford (2 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.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Guide prices in Richmond
| 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.
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
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 Richmond
What area around Richmond do you work in?
All of Greater London. Near Richmond that includes Kew, East Sheen, Brentford and Mortlake.
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 Richmond and nearby?
Yes. We cover Richmond and nearby places including Kew, East Sheen, Brentford and Mortlake. Send your postcode and we will confirm.
What is the price of a PIV unit in Richmond?
Guide prices for Richmond 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.
We will check the existing fans in your Richmond home at the same visit, because PIV works best with them working.
PIV near Richmond
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