New Malden, Greater London
Positive input ventilation (PIV) in New Malden
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering New Malden and KT1, KT3 and KT5.
- From £950 inc VAT per home
- Free survey
If your New Malden flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Work in New Malden follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in New Malden at a glance
- Town
- New Malden, Greater London
- Postcode districts
- KT1, KT3 and KT5
- Nearby
- Norbiton (1 mile), Worcester Park (2 miles) and Surbiton (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for New Malden homes
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.
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 New Malden
| 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.
Signs it is time to call us
- 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 New Malden
Is the survey free in New Malden?
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.
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.
How do I get a price for a PIV unit in New Malden?
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 New Malden do you work in?
All of Greater London. Near New Malden that includes Norbiton, Worcester Park, Surbiton and Kingston upon Thames.
Book a free New Malden survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near New Malden
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