Hadley Wood, Greater London
Positive input ventilation (PIV) in Hadley Wood
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Hadley Wood and EN4, EN5 and EN6.
- From £950 inc VAT per home
- Free survey
For a typical Hadley Wood semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Hadley Wood is about 96 miles from our base in Great Barr, Birmingham. We book Hadley Wood visits by appointment and confirm the date in writing. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Hadley Wood at a glance
- Town
- Hadley Wood, Greater London
- Postcode districts
- EN4, EN5 and EN6
- Nearby
- New Barnet (1 mile), East Barnet (1 mile) and Cockfosters (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Hadley Wood 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.
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 Hadley Wood
| 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.
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
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 Hadley Wood
Do you cover Hadley Wood and nearby?
Yes. We cover Hadley Wood and nearby places including New Barnet, East Barnet, Cockfosters and Barnet. Send your postcode and we will confirm.
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.
What is the price of a PIV unit in Hadley Wood?
Guide prices for Hadley Wood 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.
Is the survey free in Hadley Wood?
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.
Tell us whether your Hadley Wood home has a loft and we can price a PIV unit before visiting.
PIV near Hadley Wood
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