Woodford Green, Greater London
Positive input ventilation (PIV) in Woodford Green
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Woodford Green and E18, IG8 and IG9.
- From £950 inc VAT per home
- Free survey
Condensation in Woodford Green homes usually has one of two answers: better extract fans, or PIV as well.
Woodford Green is about 105 miles from our base in Great Barr, Birmingham. We book Woodford Green visits by appointment and confirm the date in writing. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Woodford Green at a glance
- Town
- Woodford Green, Greater London
- Postcode districts
- E18, IG8 and IG9
- Nearby
- Monkhams (under a mile), Buckhurst Hill (1 mile) and Highams Park (1 mile)
- 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 Woodford Green
| 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
- 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 Woodford Green
How do I get a price for a PIV unit in Woodford Green?
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.
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.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
What area around Woodford Green do you work in?
All of Greater London. Near Woodford Green that includes Monkhams, Buckhurst Hill, Highams Park and Snaresbrook.
Do you cover Woodford Green and nearby?
Yes. We cover Woodford Green and nearby places including Monkhams, Buckhurst Hill, Highams Park and Snaresbrook. Send your postcode and we will confirm.
Tell us whether your Woodford Green home has a loft and we can price a PIV unit before visiting.
PIV near Woodford Green
More services in Woodford Green
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.