Positive input ventilation (PIV) in Nelson (Lancashire)

Condensation in Nelson homes usually has one of two answers: better extract fans, or PIV as well.

Work in Nelson follows the rules for England and finishes with a written record of what was fitted and how it was set up.

PIV in Nelson at a glance

Town: Nelson, Lancashire
Postcode districts: BB8, BB9 and BB10
Nearby: Brierfield (2 miles), Colne (2 miles) and Burnley (3 miles)
Price region: North West
Survey: Free survey (UK mainland)

PIV for Nelson homes

Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls.

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 Nelson

Positive input ventilation (PIV) guide prices in Nelson
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£750–£1,325 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£950–£1,600 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£140–£280 inc VAT

North West 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

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 Nelson

What area around Nelson do you work in?

All of Lancashire. Near Nelson that includes Brierfield, Colne, Burnley and Padiham.

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.

Do you cover Nelson and nearby?

Yes. We cover Nelson and nearby places including Brierfield, Colne, Burnley and Padiham. Send your postcode and we will confirm.

What is the price of a PIV unit in Nelson?

Guide prices for Nelson use North West rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home. We confirm a fixed price in writing before any work starts.

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