Positive input ventilation (PIV) in Corby

If your Corby flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.

Corby is about 52 miles from our base in Great Barr, Birmingham. We book Corby visits by appointment and confirm the date in writing. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.

PIV in Corby at a glance

Town: Corby, Northamptonshire
Postcode districts: NN17 and NN18
Nearby: Desborough (7 miles), Kettering (7 miles) and Market Harborough (10 miles)
Price region: East Midlands
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.

Heated PIV

A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.

Wall-mounted PIV for flats

Draws air from outside through an outside wall. Suits flats and homes with no loft space.

Guide prices in Corby

Positive input ventilation (PIV) guide prices in Corby
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

East Midlands rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Signs it is time to call us

Washing dried indoors makes everything worse
You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter

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 Corby

Is the survey free in Corby?

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 Corby?

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 Corby do you work in?

All of Northamptonshire. Near Corby that includes Desborough, Kettering, Market Harborough and Oakham.

Most Corby PIV jobs are done in half a day, so ask about the next available date.