Hatfield, Hertfordshire
Positive input ventilation (PIV) in Hatfield
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Hatfield and AL7, AL9 and AL10.
- From £825 inc VAT per home
- Free survey
PIV can suit Hatfield houses and flats because it treats the whole home from one quiet unit.
For positive input ventilation (PIV) in Hatfield, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
PIV in Hatfield at a glance
- Town
- Hatfield, Hertfordshire
- Postcode districts
- AL7, AL9 and AL10
- Nearby
- Welwyn Garden City (3 miles), St Albans (5 miles) and Potters Bar (5 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
PIV for Hatfield homes
PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.
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 Hatfield
| 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 |
These ranges use our East of England rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
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
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 Hatfield
Do you cover Hatfield and nearby?
Yes. We cover Hatfield and nearby places including Welwyn Garden City, St Albans, Potters Bar and Codicote. Send your postcode and we will confirm.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
How much does PIV cost to install?
A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.
What is the price of a PIV unit in Hatfield?
Guide prices for Hatfield 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.
Is the survey free in Hatfield?
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.
Get a PIV guide price for your Hatfield home online, then confirm it on a free survey.
PIV near Hatfield
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