Knutsford, Cheshire
Positive input ventilation (PIV) in Knutsford
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Knutsford and M90, WA14 and WA16.
- From £750 inc VAT per home
- Free survey
PIV is often a good fix for Knutsford homes with condensation on every window.
We cover Knutsford and the surrounding M90, WA14 and WA16 postcodes as part of our work across Cheshire. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Knutsford at a glance
- Town
- Knutsford, Cheshire
- Postcode districts
- M90, WA14 and WA16
- Nearby
- Hale (6 miles), Altrincham (6 miles) and Wilmslow (6 miles)
- Price region
- North West
- Survey
- Free survey (UK mainland)
How we approach PIV in Knutsford
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.
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 Knutsford
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £750–£1,325 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,600 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£280 inc VAT |
North West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
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). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Knutsford
What is the price of a PIV unit in Knutsford?
Guide prices for Knutsford use North West rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £750 to £1,325 inc VAT per home. We confirm a fixed price in writing before any work starts.
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.
Is the survey free in Knutsford?
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 Knutsford?
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.
Tell us whether your Knutsford home has a loft and we can price a PIV unit before visiting.
PIV near Knutsford
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