Positive input ventilation (PIV) in East Sussex

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

Across East Sussex 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 Bexhill-on-Sea, Hailsham, Seaford, Rottingdean and Brighton.

PIV in East Sussex at a glance

Area: East Sussex
Towns listed: 15, largest Brighton
Postcode districts: BN3, BN41, BN2, BN9, BN8 and TN22
Price region: South East
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.

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 East Sussex

Positive input ventilation (PIV) guide prices in East Sussex
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£875–£1,525 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,100–£1,875 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£160–£325 inc VAT

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

Signs it is time to call us

The house feels stuffy and damp rather than cold
Washing dried indoors makes everything worse
You have no loft but still need whole-flat ventilation (wall unit)

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 East Sussex

Questions about positive input ventilation (PIV) in East Sussex

Which rules apply to ventilation in East Sussex?

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.

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.

Which towns in East Sussex do you cover?

All of East Sussex, including Bexhill-on-Sea, Hailsham, Seaford, Rottingdean and Brighton. If your town is not listed, send the postcode and we will confirm.

Are prices different in East Sussex?

Our guide prices are adjusted by region. In East Sussex we use South East rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home.

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