Positive input ventilation (PIV) in Norfolk

PIV is often a good fix for Norfolk homes with condensation on every window.

Across Norfolk the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Bowthorpe, East Dereham, North Walsham, Downham Market and Norwich.

PIV in Norfolk at a glance

Area: Norfolk
Towns listed: 11, largest Norwich
Postcode districts: NR12, PE33, PE38, IP21, IP22 and NR16
Price region: East of England
Survey: Free survey (UK mainland)

What positive input ventilation (PIV) 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.

Loft-mounted PIV

The most common option for houses with a loft. Usually fitted in half a day.

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 Norfolk

Positive input ventilation (PIV) guide prices in Norfolk
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£825–£1,475 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,050–£1,775 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£150–£310 inc VAT

Guide prices using East of England rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

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 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.

How the job runs

Survey
Fixed quote
Install
Set up
Hand over

Towns we cover in Norfolk

Questions about positive input ventilation (PIV) in Norfolk

Which towns in Norfolk do you cover?

All of Norfolk, including Bowthorpe, East Dereham, North Walsham, Downham Market and Norwich. If your town is not listed, send the postcode and we will confirm.

How long does PIV installation take?

A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.

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.

Are prices different in Norfolk?

Our guide prices are adjusted by region. In Norfolk we use East of England rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,475 inc VAT per home.

Is the survey free in Norfolk?

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.

Book a free Norfolk survey and we will say honestly whether PIV, extract fans or both are needed.