- Postcode districts
- DT1
- Nearby
- Weymouth, Yeovil and Poole
- Guide price
- £255–£600
- Typical time on site
- half a day
- Water
- Hard across most of Dorset
- Survey
- Free, at your home
What does a bathroom extractor fan cost in Dorchester?
In Dorchester, a bathroom extractor fan typically costs £255–£600 including VAT, based on South West England prices. 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 Dorchester including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Dorchester
In Dorchester we cover DT1; we also cover Weymouth, 7.2 miles away, and Yeovil.
Dorchester gets the same process as anywhere else: a free survey at your home and a written, itemised quote. If your Dorchester home is listed or in a period terrace, a fan ducted through the loft to a roof vent can avoid a new hole in the front wall, though consent may still apply. Fans fitted in Dorchester bathrooms are wired by a qualified electrician, with RCD protection and an isolator outside the room.
Most of Dorset 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
- 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
- A check of the room, any existing fan or vent, and the shortest route to the outside
- Rigid or semi-rigid ducting kept short and straight, and insulated where it crosses a cold loft
Decisions to make first
Noise
Compare the stated noise level in decibels. Inline fans and low-speed continuous fans are much quieter in the room than budget axial fans.
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 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.
