Positive input ventilation (PIV) in South Yorkshire

For a typical South Yorkshire semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

If you are anywhere in South Yorkshire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Burngreave, Chapeltown, Darton, Sheffield and Rotherham.

PIV in South Yorkshire at a glance

Area: South Yorkshire
Towns listed: 27, largest Sheffield
Postcode districts: S35, S70, S71, S25, S26 and DN1
Price region: Yorkshire
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. Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole.

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 South Yorkshire

Positive input ventilation (PIV) guide prices in South Yorkshire
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£750–£1,300 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£925–£1,600 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£135–£275 inc VAT

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

When to get it looked at

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 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.

How the job runs

Survey
Fixed quote
Install
Set up
Hand over

Towns we cover in South Yorkshire

Questions about positive input ventilation (PIV) in South Yorkshire

Which towns in South Yorkshire do you cover?

All of South Yorkshire, including Burngreave, Chapeltown, Darton, Sheffield and Rotherham. If your town is not listed, send the postcode and we will confirm.

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 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.

Are prices different in South Yorkshire?

Our guide prices are adjusted by region. In South Yorkshire we use Yorkshire rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,300 inc VAT per home.

Is the survey free in South Yorkshire?

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 South Yorkshire home has a loft and we can price a PIV unit before visiting.