Emsworth, Hampshire
Positive input ventilation (PIV) in Emsworth
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Emsworth and PO9, PO10 and PO11.
- From £875 inc VAT per home
- Free survey

If your Emsworth flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
We cover Emsworth and the surrounding PO9, PO10 and PO11 postcodes as part of our work across Hampshire. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Emsworth at a glance
- Town
- Emsworth, Hampshire
- Postcode districts
- PO9, PO10 and PO11
- Nearby
- Havant (2 miles), South Hayling (4 miles) and Hayling Island (5 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
PIV for Emsworth homes
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.
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 Emsworth
| 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
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 Emsworth
What is the price of a PIV unit in Emsworth?
Guide prices for Emsworth 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.
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.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
Is the survey free in Emsworth?
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.
How do I get a price for a PIV unit in Emsworth?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
Send a photo of your loft hatch area and landing ceiling for a quicker Emsworth quote.
PIV near Emsworth
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