Cosham, Hampshire
Positive input ventilation (PIV) in Cosham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Cosham and PO2, PO3 and PO6.
- From £875 inc VAT per home
- Free survey
PIV can suit Cosham houses and flats because it treats the whole home from one quiet unit.
Work in Cosham follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Cosham at a glance
- Town
- Cosham, Hampshire
- Postcode districts
- PO2, PO3 and PO6
- Nearby
- Waterlooville (3 miles), Havant (4 miles) and Portsmouth (4 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
How we approach PIV in Cosham
It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Guide prices in Cosham
| 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 |
South East rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
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 that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Cosham
What area around Cosham do you work in?
All of Hampshire. Near Cosham that includes Waterlooville, Havant, Portsmouth and Southsea.
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.
Do you cover Cosham and nearby?
Yes. We cover Cosham and nearby places including Waterlooville, Havant, Portsmouth and Southsea. Send your postcode and we will confirm.
What is the price of a PIV unit in Cosham?
Guide prices for Cosham 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.
Tell us whether your Cosham home has a loft and we can price a PIV unit before visiting.
PIV near Cosham
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