Northampton, Northamptonshire
Positive input ventilation (PIV) in Northampton
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Northampton and NN1, NN2, NN3 and NN4.
- From £775 inc VAT per home
- Free survey
PIV is often a good fix for Northampton homes with condensation on every window.
For positive input ventilation (PIV) in Northampton, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
PIV in Northampton at a glance
- Town
- Northampton, Northamptonshire
- Postcode districts
- NN1, NN2, NN3, NN4 and NN7
- Nearby
- Wellingborough (9 miles), Daventry (12 miles) and Rushden (12 miles)
- Price region
- East Midlands
- Survey
- Free survey (UK mainland)
What the work involves
PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Guide prices in Northampton
| 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
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
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). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Northampton
How do I get a price for a PIV unit in Northampton?
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.
How much does PIV cost to run?
A standard PIV unit uses very little electricity, comparable to a low-energy light bulb on normal speed. A heated unit costs more in cold spells because the heater switches on when loft air is cold.
Will PIV make my house cold?
Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.
What area around Northampton do you work in?
All of Northamptonshire. Near Northampton that includes Wellingborough, Daventry, Rushden and Kettering.
Do you cover Northampton and nearby?
Yes. We cover Northampton and nearby places including Wellingborough, Daventry, Rushden and Kettering. Send your postcode and we will confirm.
We will check the existing fans in your Northampton home at the same visit, because PIV works best with them working.
PIV near Northampton
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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.