- Postcode districts
- G82
- Nearby
- Vale of Leven, Erskine and Clydebank
- Guide price
- £240–£600
- Typical time on site
- half a day
- Water
- Soft across most of Greater Glasgow
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Dumbarton?
Our guide price for a bathroom extractor fan in Dumbarton is £240–£600 including VAT. We adjust the national guide for Scotland, where prices are typically about 4% below the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.
Extractor fan
- Fan with timer or humidistat
Inline fan
- Ducting to a roof or soffit vent
Continuous extract
- Good for windowless rooms
Guide prices for Dumbarton including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Dumbarton
As well as Dumbarton itself (G82), we survey in Vale of Leven, Erskine and Clydebank.
Dumbarton gets the same process as anywhere else: a free survey at your home and a written, itemised quote. For windowless bathrooms in Dumbarton homes, continuous extract that boosts on humidity often works better than a fan tied to the light switch. If your Dumbarton bathroom has black mould on the ceiling or silicone, the fan and its duct are the first things we check.
Water across much of Greater Glasgow is soft. 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 backdraught shutter and external grille, so cold air does not blow back in
- Core-drilling through the wall, or ducting through the loft to a roof or soffit vent
- 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
Decisions to make first
Axial, centrifugal or inline
Axial fans suit short, straight runs; centrifugal fans cope better with longer ducts; inline fans sit in the loft and are the quietest in the room.
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.
Rules that apply in Scotland
In Scotland, the Technical Handbook also uses 15 l/s extract for a bathroom. A replacement fan rarely needs a building warrant, but forming a new bathroom may.
