Stevenage, Hertfordshire
Positive input ventilation (PIV) in Stevenage
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Stevenage and SG1, SG2 and SG4.
- From £825 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Stevenage, after checking the house first.
We cover Stevenage and the surrounding SG1, SG2 and SG4 postcodes as part of our work across Hertfordshire. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
PIV in Stevenage at a glance
- Town
- Stevenage, Hertfordshire
- Postcode districts
- SG1, SG2 and SG4
- Nearby
- Codicote (4 miles), Hitchin (5 miles) and Letchworth Garden City (5 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
What the work involves
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.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Guide prices in Stevenage
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,475 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,050–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£310 inc VAT |
East of England 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
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). 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 Stevenage
What is the price of a PIV unit in Stevenage?
Guide prices for Stevenage use East of England rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,475 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 Stevenage?
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 Stevenage?
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 Stevenage quote.
PIV near Stevenage
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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.