Oxford, Oxfordshire
Positive input ventilation (PIV) in Oxford
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Oxford and OX1, OX2, OX3 and OX4.
- From £875 inc VAT per home
- Free survey
If your Oxford flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Customers in Oxford can get a guide price online in a couple of minutes. It uses South East rates, which is what we would charge for the same job anywhere in Oxfordshire. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Oxford at a glance
- Town
- Oxford, Oxfordshire
- Postcode districts
- OX1, OX2, OX3 and OX4
- Nearby
- Cowley (2 miles), Kidlington (5 miles) and Abingdon (6 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
PIV for Oxford homes
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.
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 Oxford
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,100–£1,875 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £160–£325 inc VAT |
South East 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
- 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 Oxford
What is the price of a PIV unit in Oxford?
Guide prices for Oxford use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.
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.
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.
Is the survey free in Oxford?
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 Oxford?
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.
Most Oxford PIV jobs are done in half a day, so ask about the next available date.
PIV near Oxford
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