Crystal Palace, Greater London
Positive input ventilation (PIV) in Crystal Palace
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Crystal Palace and SE19, SE20 and SE26.
- From £950 inc VAT per home
- Free survey
Condensation in Crystal Palace homes usually has one of two answers: better extract fans, or PIV as well.
We cover Crystal Palace and the surrounding SE19, SE20 and SE26 postcodes as part of our work across Greater London. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Crystal Palace at a glance
- Town
- Crystal Palace, Greater London
- Postcode districts
- SE19, SE20 and SE26
- Nearby
- Upper Norwood (1 mile), Gipsy Hill (1 mile) and South Norwood (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach PIV in Crystal Palace
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 Crystal Palace
| 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.
When to get it looked at
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
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 Crystal Palace
What is the price of a PIV unit in Crystal Palace?
Guide prices for Crystal Palace 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.
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 long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
Is the survey free in Crystal Palace?
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 do I get a price for a PIV unit in Crystal Palace?
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.
We will check the existing fans in your Crystal Palace home at the same visit, because PIV works best with them working.
PIV near Crystal Palace
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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.