Borehamwood, Hertfordshire
Positive input ventilation (PIV) in Borehamwood
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Borehamwood and HA8, WD6 and WD7.
- From £825 inc VAT per home
- Free survey
Condensation in Borehamwood homes usually has one of two answers: better extract fans, or PIV as well.
Work in Borehamwood follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Borehamwood at a glance
- Town
- Borehamwood, Hertfordshire
- Postcode districts
- HA8, WD6 and WD7
- Nearby
- Edgwarebury (2 miles), Barnet (3 miles) and Totteridge (4 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
How we approach PIV in Borehamwood
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.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Guide prices in Borehamwood
| 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.
When to get it looked at
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
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). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.
Questions from Borehamwood
Do you cover Borehamwood and nearby?
Yes. We cover Borehamwood and nearby places including Edgwarebury, Barnet, Totteridge and Bushey. Send your postcode and we will confirm.
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.
What is the price of a PIV unit in Borehamwood?
Guide prices for Borehamwood 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 Borehamwood?
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.
Tell us whether your Borehamwood home has a loft and we can price a PIV unit before visiting.
PIV near Borehamwood
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