Hanworth, Greater London
Positive input ventilation (PIV) in Hanworth
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Hanworth and TW2, TW12 and TW13.
- From £950 inc VAT per home
- Free survey
For a typical Hanworth semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Whether the property is in the middle of Hanworth 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 Hanworth at a glance
- Town
- Hanworth, Greater London
- Postcode districts
- TW2, TW12 and TW13
- Nearby
- Hampton (2 miles), Feltham (2 miles) and West Molesey (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach PIV in Hanworth
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.
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 Hanworth
| 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
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
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 Hanworth
How do I get a price for a PIV unit in Hanworth?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
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 area around Hanworth do you work in?
All of Greater London. Near Hanworth that includes Hampton, Feltham, West Molesey and Sunbury-on-Thames.
Do you cover Hanworth and nearby?
Yes. We cover Hanworth and nearby places including Hampton, Feltham, West Molesey and Sunbury-on-Thames. Send your postcode and we will confirm.
Book a free Hanworth survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Hanworth
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.