- Postcode districts
- BB1, BB2, BB3
- Nearby
- Blackburn, Haslingden and Accrington
- Guide price
- £235–£550
- Typical time on site
- half a day
- Water
- Soft across most of Lancashire
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Darwen?
In Darwen, a bathroom extractor fan typically costs £235–£550 including VAT, based on North West England prices. We adjust the national guide for North West England, where prices are typically about 6% below the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.
Extractor fan
- Ducted to outside
Inline fan
- Grille in the ceiling
Continuous extract
- Low-energy fan running all the time
Guide prices for Darwen including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Darwen
As well as Darwen itself (BB1, BB2 and BB3), we survey in Blackburn, Haslingden and Accrington.
In Darwen, as anywhere, the age of the house decides a lot: pipe sizes, floor construction and where the soil stack runs. For windowless bathrooms in Darwen homes, continuous extract that boosts on humidity often works better than a fan tied to the light switch. In Darwen flats, a new vent through an outside wall may need freeholder consent, so we raise it at the survey.
Most of Lancashire is supplied with soft water. Even so, condensation is the bigger problem in any bathroom, and a properly sized extractor is what deals with it. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- A fan chosen to meet the bathroom extract rate: 15 l/s intermittent or 8 l/s continuous
- A check of the room, any existing fan or vent, and the shortest route to the outside
- Wiring by a qualified electrician, with an isolator outside the room and RCD protection
- Core-drilling through the wall, or ducting through the loft to a roof or soffit vent
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.
Wall or ceiling
A wall fan on an outside wall is the simplest. A ceiling fan over the shower takes steam away at source but needs ducting through the loft.
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.
