Horsham, West Sussex
Positive input ventilation (PIV) in Horsham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Horsham and RH12 and RH13.
- From £875 inc VAT per home
- Free survey
PIV is often a good fix for Horsham homes with condensation on every window.
We cover Horsham and the surrounding RH12 and RH13 postcodes as part of our work across West Sussex. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Horsham at a glance
- Town
- Horsham, West Sussex
- Postcode districts
- RH12 and RH13
- Nearby
- Broadfield (6 miles), Crawley (7 miles) and Cranleigh (9 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
How we approach PIV in Horsham
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.
Guide prices in Horsham
| 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 |
These ranges use our South East rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
Rules that apply 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.
Questions from Horsham
What area around Horsham do you work in?
All of West Sussex. Near Horsham that includes Broadfield, Crawley, Cranleigh and Horley.
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.
Do you cover Horsham and nearby?
Yes. We cover Horsham and nearby places including Broadfield, Crawley, Cranleigh and Horley. Send your postcode and we will confirm.
What is the price of a PIV unit in Horsham?
Guide prices for Horsham use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.
Send a photo of your loft hatch area and landing ceiling for a quicker Horsham quote.
PIV near Horsham
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