Ampthill, Bedfordshire
Positive input ventilation (PIV) in Ampthill
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Ampthill and MK45.
- From £825 inc VAT per home
- Free survey
For a typical Ampthill semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Work in Ampthill follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Ampthill at a glance
- Town
- Ampthill, Bedfordshire
- Postcode districts
- MK45
- Nearby
- Flitwick (2 miles), Kempston (6 miles) and Bedford (8 miles)
- Price region
- East of England
- 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 Ampthill
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,475 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,050–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£310 inc VAT |
Guide prices using East of England 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
- 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
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 Ampthill
What area around Ampthill do you work in?
All of Bedfordshire. Near Ampthill that includes Flitwick, Kempston, Bedford and Henlow.
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 Ampthill and nearby?
Yes. We cover Ampthill and nearby places including Flitwick, Kempston, Bedford and Henlow. Send your postcode and we will confirm.
What is the price of a PIV unit in Ampthill?
Guide prices for Ampthill use East of England rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,475 inc VAT per home. We confirm a fixed price in writing before any work starts.
Get a PIV guide price for your Ampthill home online, then confirm it on a free survey.
PIV near Ampthill
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