Stanwell, Surrey
Positive input ventilation (PIV) in Stanwell
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Stanwell and TW6, TW15 and TW19.
- From £875 inc VAT per home
- Free survey
For a typical Stanwell semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
We cover Stanwell and the surrounding TW6, TW15 and TW19 postcodes as part of our work across Surrey. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Stanwell at a glance
- Town
- Stanwell, Surrey
- Postcode districts
- TW6, TW15 and TW19
- Nearby
- Ashford (2 miles), Staines (2 miles) and Feltham (3 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
PIV for Stanwell homes
Loft air is usually a little warmer and drier than outside air, and the unit filters it before it comes down into the house. Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Guide prices in Stanwell
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,100–£1,875 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £160–£325 inc VAT |
South East 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
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
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 Stanwell
How do I get a price for a PIV unit in Stanwell?
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 Stanwell do you work in?
All of Surrey. Near Stanwell that includes Ashford, Staines, Feltham and Cranford.
Do you cover Stanwell and nearby?
Yes. We cover Stanwell and nearby places including Ashford, Staines, Feltham and Cranford. Send your postcode and we will confirm.
Book a free Stanwell survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Stanwell
More services in Stanwell
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.