Positive input ventilation (PIV) in Edmonton

For a typical Edmonton semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

Edmonton is about 101 miles from our base in Great Barr, Birmingham. We book Edmonton 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 Edmonton at a glance

Town: Edmonton, Greater London
Postcode districts: N9, N18 and N21
Nearby: Ponders End (1 mile), Northumberland Park (2 miles) and Tottenham (2 miles)
Price region: London
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.

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 Edmonton

Positive input ventilation (PIV) guide prices in Edmonton
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

These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

When to get it looked at

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

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 Edmonton

Is the survey free in Edmonton?

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.

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.

How do I get a price for a PIV unit in Edmonton?

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 Edmonton do you work in?

All of Greater London. Near Edmonton that includes Ponders End, Northumberland Park, Tottenham and Southgate.

Book a free Edmonton survey and we will say honestly whether PIV, extract fans or both are needed.