Alton, Hampshire
Positive input ventilation (PIV) in Alton
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Alton and GU34 and GU35.
- From £875 inc VAT per home
- Free survey
Condensation in Alton homes usually has one of two answers: better extract fans, or PIV as well.
Whether the property is in the middle of Alton 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 Alton at a glance
- Town
- Alton, Hampshire
- Postcode districts
- GU34 and GU35
- Nearby
- Bordon (6 miles), Farnham (9 miles) and Basingstoke (9 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
PIV for Alton homes
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.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Guide prices in Alton
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,100–£1,875 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £160–£325 inc VAT |
These ranges use our South East rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
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 Alton
Do you cover Alton and nearby?
Yes. We cover Alton and nearby places including Bordon, Farnham, Basingstoke and Hale. Send your postcode and we will confirm.
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.
What is the price of a PIV unit in Alton?
Guide prices for Alton use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.
Is the survey free in Alton?
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.
Most Alton PIV jobs are done in half a day, so ask about the next available date.
PIV near Alton
More services in Alton
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.