Positive input ventilation (PIV) in Lancashire

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

If you are anywhere in Lancashire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Blackburn, Blackpool, Rossendale, Morecambe and Lancaster.

PIV in Lancashire at a glance

Area: Lancashire
Towns listed: 29, largest Preston
Postcode districts: L40, WN5, PR5, PR25, BB1 and BB5
Price region: North West
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. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.

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.

PIV with fan upgrades

PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.

Guide prices in Lancashire

Positive input ventilation (PIV) guide prices in Lancashire
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

These ranges use our North West rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

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 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.

How the job runs

Survey
Fixed quote
Install
Set up
Hand over

Towns we cover in Lancashire

Questions about positive input ventilation (PIV) in Lancashire

Is the survey free in Lancashire?

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 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.

Which rules apply to ventilation in Lancashire?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

Which towns in Lancashire do you cover?

All of Lancashire, including Blackburn, Blackpool, Rossendale, Morecambe and Lancaster. If your town is not listed, send the postcode and we will confirm.

Send a photo of your loft hatch area and landing ceiling for a quicker Lancashire quote.