Chalk Farm, Greater London
Positive input ventilation (PIV) in Chalk Farm
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Chalk Farm and NW1, NW3 and NW5.
- From £950 inc VAT per home
- Free survey
PIV can suit Chalk Farm houses and flats because it treats the whole home from one quiet unit.
For positive input ventilation (PIV) in Chalk Farm, 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 Chalk Farm at a glance
- Town
- Chalk Farm, Greater London
- Postcode districts
- NW1, NW3 and NW5
- Nearby
- Camden Town (under a mile), Belsize Park (1 mile) and Regent's Park (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Chalk Farm homes
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 Chalk Farm
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £950–£1,675 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,200–£2,025 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £175–£355 inc VAT |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
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 Chalk Farm
Do you cover Chalk Farm and nearby?
Yes. We cover Chalk Farm and nearby places including Camden Town, Belsize Park, Regent's Park and Holloway. 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 Chalk Farm?
Guide prices for Chalk Farm use London rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £950 to £1,675 inc VAT per home. We confirm a fixed price in writing before any work starts.
Is the survey free in Chalk Farm?
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.
Send a photo of your loft hatch area and landing ceiling for a quicker Chalk Farm quote.
PIV near Chalk Farm
More services in Chalk Farm
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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.