Liverpool, Merseyside
Positive input ventilation (PIV) in Liverpool
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Liverpool and L3, L69 and L70.
- From £750 inc VAT per home
- Free survey
For a typical Liverpool semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Whether the property is in the middle of Liverpool 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 Liverpool at a glance
- Town
- Liverpool, Merseyside
- Postcode districts
- L3, L69 and L70
- Nearby
- Kensington (1 mile), Kirkdale (2 miles) and Birkenhead (2 miles)
- Price region
- North West
- Survey
- Free survey (UK mainland)
How we approach PIV in Liverpool
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 Liverpool
| 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 |
These ranges use our North West rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- 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. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Liverpool
What is the price of a PIV unit in Liverpool?
Guide prices for Liverpool 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 Liverpool?
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 Liverpool?
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.
We will check the existing fans in your Liverpool home at the same visit, because PIV works best with them working.
PIV near Liverpool
More services in Liverpool
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.