- Postcode districts
- SL7
- Nearby
- Maidenhead, High Wycombe and Slough
- Guide price
- £280–£650
- Typical time on site
- half a day
- Water
- Hard across most of Buckinghamshire
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Marlow?
In Marlow, a bathroom extractor fan typically costs £280–£650 including VAT, based on South East England prices. We adjust the national guide for South East England, where prices are typically about 12% above the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.
Extractor fan
- Wired to regulations
Inline fan
- Quiet fan in the loft void
Continuous extract
- Boost on humidity
Guide prices for Marlow including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Marlow
In Marlow we cover SL7; we also cover Maidenhead, 4 miles away, and High Wycombe.
Marlow gets the same process as anywhere else: a free survey at your home and a written, itemised quote. We check the duct route at Marlow surveys, because a short, straight run to outside matters more than the fan's headline figure. In Marlow flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Most of Buckinghamshire has hard water. Steam carries that scale onto mirrors and glass, so a fan that clears the room quickly helps on both counts. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Making good around the fan and checking that it extracts properly at the grille
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
- A backdraught shutter and external grille, so cold air does not blow back in
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
Decisions to make first
Intermittent or continuous
An intermittent fan runs during and after use. A continuous fan runs quietly all the time at a low rate and boosts when humidity rises.
Replacement air
A fan needs air to replace what it removes, so leave a gap of around 10 mm under the door or fit a door grille. A sealed room starves the fan.
Rules that apply in England
In England, Approved Document F sets bathroom extract at 15 l/s for an intermittent fan or 8 l/s for continuous extract. Wiring a new fan alters a circuit in a room with a bath or shower, so it is notifiable under Part P.
