Caterham, Surrey
Positive input ventilation (PIV) in Caterham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Caterham and CR3, CR6 and RH9.
- From £875 inc VAT per home
- Free survey
PIV can suit Caterham houses and flats because it treats the whole home from one quiet unit.
Whether the property is in the middle of Caterham or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
PIV in Caterham at a glance
- Town
- Caterham, Surrey
- Postcode districts
- CR3, CR6 and RH9
- Nearby
- Kenley (3 miles), Oxted (4 miles) and Sanderstead (4 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
What the work involves
It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
Guide prices in Caterham
| 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.
Common reasons people call
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
Rules that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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 Caterham
Is the survey free in Caterham?
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 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.
Will PIV make my house cold?
Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.
How do I get a price for a PIV unit in Caterham?
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 Caterham do you work in?
All of Surrey. Near Caterham that includes Kenley, Oxted, Sanderstead and Coulsdon.
We will check the existing fans in your Caterham home at the same visit, because PIV works best with them working.
PIV near Caterham
More services in Caterham
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.