Blandford Forum, Dorset
Positive input ventilation (PIV) in Blandford Forum
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Blandford Forum and DT11.
- From £825 inc VAT per home
- Free survey
If your Blandford Forum flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Whether the property is in the middle of Blandford Forum or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
PIV in Blandford Forum at a glance
- Town
- Blandford Forum, Dorset
- Postcode districts
- DT11
- Nearby
- Wimborne Minster (9 miles), Broadstone (10 miles) and Canford Heath (11 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Blandford Forum
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,450 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,025–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£305 inc VAT |
Guide prices using South West 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
- 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 Blandford Forum
Is the survey free in Blandford Forum?
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.
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.
How do I get a price for a PIV unit in Blandford Forum?
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 Blandford Forum do you work in?
All of Dorset. Near Blandford Forum that includes Wimborne Minster, Broadstone, Canford Heath and Ferndown.
Send a photo of your loft hatch area and landing ceiling for a quicker Blandford Forum quote.
PIV near Blandford Forum
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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.