Marylebone, Greater London
Positive input ventilation (PIV) in Marylebone
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Marylebone and NW8, W1H and W2.
- From £950 inc VAT per home
- Free survey
PIV is often a good fix for Marylebone homes with condensation on every window.
Work in Marylebone follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Marylebone at a glance
- Town
- Marylebone, Greater London
- Postcode districts
- NW8, W1H and W2
- Nearby
- Church Street (under a mile), Regent's Park (under a mile) and Little Venice (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Guide prices in Marylebone
| 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.
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
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 Marylebone
Is the survey free in Marylebone?
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 Marylebone?
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 Marylebone do you work in?
All of Greater London. Near Marylebone that includes Church Street, Regent's Park, Little Venice and Hyde Park.
Send a photo of your loft hatch area and landing ceiling for a quicker Marylebone quote.
PIV near Marylebone
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Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.