Andover, Hampshire
Positive input ventilation (PIV) in Andover
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Andover and SP10 and SP11.
- From £875 inc VAT per home
- Free survey
Condensation in Andover homes usually has one of two answers: better extract fans, or PIV as well.
Customers in Andover can get a guide price online in a couple of minutes. It uses South East rates, which is what we would charge for the same job anywhere in Hampshire. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Andover at a glance
- Town
- Andover, Hampshire
- Postcode districts
- SP10 and SP11
- Nearby
- Tidworth (8 miles), Winchester (13 miles) and Amesbury (13 miles)
- Price region
- South East
- 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.
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 Andover
| 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 |
South East rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
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
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 Andover
Is the survey free in Andover?
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 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.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
How do I get a price for a PIV unit in Andover?
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.
What area around Andover do you work in?
All of Hampshire. Near Andover that includes Tidworth, Winchester, Amesbury and Newbury.
We will check the existing fans in your Andover home at the same visit, because PIV works best with them working.
PIV near Andover
More services in Andover
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.