Derby, Derbyshire
Positive input ventilation (PIV) in Derby
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Derby and DE1, DE22 and DE23.
- From £775 inc VAT per home
- Free survey
PIV is often a good fix for Derby homes with condensation on every window.
Derby is about 31 miles from our base in Great Barr, Birmingham. We book Derby visits by appointment and confirm the date in writing. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Derby at a glance
- Town
- Derby, Derbyshire
- Postcode districts
- DE1, DE22 and DE23
- Nearby
- Chaddesden (2 miles), Oakwood (2 miles) and Sinfin (3 miles)
- Price region
- East Midlands
- Survey
- Free survey (UK mainland)
PIV for Derby homes
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.
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 Derby
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £775–£1,375 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £975–£1,650 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£290 inc VAT |
Guide prices using East Midlands 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
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
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 Derby
Is the survey free in Derby?
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.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
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.
How do I get a price for a PIV unit in Derby?
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 Derby do you work in?
All of Derbyshire. Near Derby that includes Chaddesden, Oakwood, Sinfin and Belper.
Tell us whether your Derby home has a loft and we can price a PIV unit before visiting.
PIV near Derby
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.