Nailsea, Somerset
Positive input ventilation (PIV) in Nailsea
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Nailsea and BS20, BS21 and BS48.
- From £825 inc VAT per home
- Free survey
If your Nailsea flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Work in Nailsea follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Nailsea at a glance
- Town
- Nailsea, Somerset
- Postcode districts
- BS20, BS21 and BS48
- Nearby
- Portishead (4 miles), Yatton (4 miles) and Clevedon (4 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
PIV for Nailsea 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.
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 Nailsea
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,450 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,025–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£305 inc VAT |
Guide prices using South West 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
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
Rules that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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 Nailsea
Is the survey free in Nailsea?
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.
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.
How do I get a price for a PIV unit in Nailsea?
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.
What area around Nailsea do you work in?
All of Somerset. Near Nailsea that includes Portishead, Yatton, Clevedon and Bishopsworth.
Send a photo of your loft hatch area and landing ceiling for a quicker Nailsea quote.
PIV near Nailsea
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