Hertford, Hertfordshire
Positive input ventilation (PIV) in Hertford
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Hertford and SG12, SG13 and SG14.
- From £825 inc VAT per home
- Free survey
PIV can suit Hertford houses and flats because it treats the whole home from one quiet unit.
Work in Hertford follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Hertford at a glance
- Town
- Hertford, Hertfordshire
- Postcode districts
- SG12, SG13 and SG14
- Nearby
- Ware (2 miles), Hoddesdon (4 miles) and Broxbourne (4 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.
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 Hertford
| 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
- 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
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 Hertford
Is the survey free in Hertford?
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 Hertford?
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 Hertford do you work in?
All of Hertfordshire. Near Hertford that includes Ware, Hoddesdon, Broxbourne and Welwyn Garden City.
Most Hertford PIV jobs are done in half a day, so ask about the next available date.
PIV near Hertford
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