Positive input ventilation (PIV) in Herefordshire

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

If you are anywhere in Herefordshire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Hereford, Leominster and Ross-on-Wye.

PIV in Herefordshire at a glance

Area: Herefordshire
Towns listed: 3, largest Hereford
Postcode districts: GL17, HR9, HR1, HR2 and HR6
Price region: West Midlands
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 Herefordshire

Positive input ventilation (PIV) guide prices in Herefordshire
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£795–£1,395 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£995–£1,695 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£145–£295 inc VAT

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

Common reasons people call

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 Herefordshire

Questions about positive input ventilation (PIV) in Herefordshire

Are prices different in Herefordshire?

Our guide prices are adjusted by region. In Herefordshire we use West Midlands rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £795 to £1,395 inc VAT per home.

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.

Can PIV be fitted in a flat?

Yes. Flats without loft space use a wall-mounted PIV unit that draws air from outside through an outside wall.

Is the survey free in Herefordshire?

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.

Which rules apply to ventilation in Herefordshire?

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.

We will check the existing fans in your Herefordshire home at the same visit, because PIV works best with them working.