Walthamstow, Greater London
Positive input ventilation (PIV) in Walthamstow
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Walthamstow and E4, E10, E11 and E17.
- From £950 inc VAT per home
- Free survey
PIV is often a good fix for Walthamstow homes with condensation on every window.
Whether the property is in the middle of Walthamstow 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 Walthamstow at a glance
- Town
- Walthamstow, Greater London
- Postcode districts
- E4, E10, E11 and E17
- Nearby
- Highams Park (1 mile), Tottenham Hale (2 miles) and Snaresbrook (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach PIV in Walthamstow
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 Walthamstow
| 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
- 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 Walthamstow
Is the survey free in Walthamstow?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
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.
How do I get a price for a PIV unit in Walthamstow?
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.
What area around Walthamstow do you work in?
All of Greater London. Near Walthamstow that includes Highams Park, Tottenham Hale, Snaresbrook and Northumberland Park.
Tell us whether your Walthamstow home has a loft and we can price a PIV unit before visiting.
PIV near Walthamstow
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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.