Perry Vale, Greater London
Positive input ventilation (PIV) in Perry Vale
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Perry Vale and SE6, SE23 and SE26.
- From £950 inc VAT per home
- Free survey
PIV is often a good fix for Perry Vale homes with condensation on every window.
We cover Perry Vale and the surrounding SE6, SE23 and SE26 postcodes as part of our work across Greater London. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Perry Vale at a glance
- Town
- Perry Vale, Greater London
- Postcode districts
- SE6, SE23 and SE26
- Nearby
- Forest Hill (1 mile), Crofton Park (1 mile) and Catford (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Perry Vale 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.
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 Perry Vale
| 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
- 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
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 Perry Vale
What area around Perry Vale do you work in?
All of Greater London. Near Perry Vale that includes Forest Hill, Crofton Park, Catford and Ladywell.
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 much does PIV cost to run?
A standard PIV unit uses very little electricity, comparable to a low-energy light bulb on normal speed. A heated unit costs more in cold spells because the heater switches on when loft air is cold.
Do you cover Perry Vale and nearby?
Yes. We cover Perry Vale and nearby places including Forest Hill, Crofton Park, Catford and Ladywell. Send your postcode and we will confirm.
What is the price of a PIV unit in Perry Vale?
Guide prices for Perry Vale 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.
Send a photo of your loft hatch area and landing ceiling for a quicker Perry Vale quote.
PIV near Perry Vale
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