Lymm, Cheshire
Positive input ventilation (PIV) in Lymm
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Lymm and M31, WA1 and WA13.
- From £750 inc VAT per home
- Free survey
PIV is often a good fix for Lymm homes with condensation on every window.
Work in Lymm follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Lymm at a glance
- Town
- Lymm, Cheshire
- Postcode districts
- M31, WA1 and WA13
- Nearby
- Warrington (4 miles), Irlam (5 miles) and Altrincham (5 miles)
- Price region
- North West
- Survey
- Free survey (UK mainland)
What the work involves
Loft air is usually a little warmer and drier than outside air, and the unit filters it before it comes down into the house. Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught.
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 Lymm
| 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 |
North West 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
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
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). 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 Lymm
What area around Lymm do you work in?
All of Cheshire. Near Lymm that includes Warrington, Irlam, Altrincham and Hale.
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.
Do you cover Lymm and nearby?
Yes. We cover Lymm and nearby places including Warrington, Irlam, Altrincham and Hale. Send your postcode and we will confirm.
What is the price of a PIV unit in Lymm?
Guide prices for Lymm 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.
Most Lymm PIV jobs are done in half a day, so ask about the next available date.
PIV near Lymm
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