Runcorn, Cheshire
Positive input ventilation (PIV) in Runcorn
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Runcorn and L24, WA7 and WA8.
- From £750 inc VAT per home
- Free survey
For a typical Runcorn semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Runcorn is about 64 miles from our base in Great Barr, Birmingham. We book Runcorn 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 Runcorn at a glance
- Town
- Runcorn, Cheshire
- Postcode districts
- L24, WA7 and WA8
- Nearby
- Widnes (1 mile), Halewood (4 miles) and Speke (4 miles)
- Price region
- North West
- 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.
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 Runcorn
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £750–£1,325 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,600 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£280 inc VAT |
Guide prices using North West 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
- 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. 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 Runcorn
What is the price of a PIV unit in Runcorn?
Guide prices for Runcorn use North West rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home. We confirm a fixed price in writing before any work starts.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
How much does PIV cost to install?
A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.
Is the survey free in Runcorn?
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 Runcorn?
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.
Book a free Runcorn survey and we will say honestly whether PIV, extract fans or both are needed.
PIV near Runcorn
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