Sevenoaks, Kent
Positive input ventilation (PIV) in Sevenoaks
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Sevenoaks and TN13, TN14 and TN15.
- From £875 inc VAT per home
- Free survey
PIV is often a good fix for Sevenoaks homes with condensation on every window.
Sevenoaks is about 126 miles from our base in Great Barr, Birmingham. We book Sevenoaks visits by appointment and confirm the date in writing. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Sevenoaks at a glance
- Town
- Sevenoaks, Kent
- Postcode districts
- TN13, TN14 and TN15
- Nearby
- Chelsfield (6 miles), Tonbridge (6 miles) and Biggin Hill (7 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
How we approach PIV in Sevenoaks
PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.
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 Sevenoaks
| 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.
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
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Sevenoaks
What is the price of a PIV unit in Sevenoaks?
Guide prices for Sevenoaks use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.
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.
Is the survey free in Sevenoaks?
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 Sevenoaks?
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.
Most Sevenoaks PIV jobs are done in half a day, so ask about the next available date.
PIV near Sevenoaks
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