Grantham, Lincolnshire
Positive input ventilation (PIV) in Grantham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Grantham and NG31 and NG32.
- From £775 inc VAT per home
- Free survey
PIV is often a good fix for Grantham homes with condensation on every window.
Whether the property is in the middle of Grantham 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 Grantham at a glance
- Town
- Grantham, Lincolnshire
- Postcode districts
- NG31 and NG32
- Nearby
- Sleaford (11 miles), Newark-on-Trent (13 miles) and Melton Mowbray (14 miles)
- Price region
- East Midlands
- Survey
- Free survey (UK mainland)
PIV for Grantham 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.
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 Grantham
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £775–£1,375 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £975–£1,650 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£290 inc VAT |
Guide prices using East Midlands rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Signs it is time to call us
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
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 Grantham
Do you cover Grantham and nearby?
Yes. We cover Grantham and nearby places including Sleaford, Newark-on-Trent, Melton Mowbray and Bourne. Send your postcode and we will confirm.
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.
What is the price of a PIV unit in Grantham?
Guide prices for Grantham use East Midlands rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £775 to £1,375 inc VAT per home. We confirm a fixed price in writing before any work starts.
Is the survey free in Grantham?
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.
Tell us whether your Grantham home has a loft and we can price a PIV unit before visiting.
PIV near Grantham
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