Wealdstone, Greater London
Positive input ventilation (PIV) in Wealdstone
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Wealdstone and HA1, HA3 and HA7.
- From £950 inc VAT per home
- Free survey
For a typical Wealdstone semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Wealdstone is about 94 miles from our base in Great Barr, Birmingham. We book Wealdstone 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 Wealdstone at a glance
- Town
- Wealdstone, Greater London
- Postcode districts
- HA1, HA3 and HA7
- Nearby
- Headstone (1 mile), Harrow Weald (1 mile) and Harrow (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach PIV in Wealdstone
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 Wealdstone
| 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 |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
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. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Wealdstone
What area around Wealdstone do you work in?
All of Greater London. Near Wealdstone that includes Headstone, Harrow Weald, Harrow and Harrow on the Hill.
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.
Do you cover Wealdstone and nearby?
Yes. We cover Wealdstone and nearby places including Headstone, Harrow Weald, Harrow and Harrow on the Hill. Send your postcode and we will confirm.
What is the price of a PIV unit in Wealdstone?
Guide prices for Wealdstone 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 Wealdstone home at the same visit, because PIV works best with them working.
PIV near Wealdstone
More services in Wealdstone
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