West Derby, Merseyside
Extractor fan installation in West Derby
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested. Covering West Derby and L11, L12 and L13.
- From £165 inc VAT per fan
- Free survey
Many extractor fans in West Derby homes need replacing because they never extracted properly.
West Derby is about 74 miles from our base in Great Barr, Birmingham. We book West Derby visits by appointment and confirm the date in writing. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
Extractor fans in West Derby at a glance
- Town
- West Derby, Merseyside
- Postcode districts
- L11, L12 and L13
- Nearby
- Norris Green (1 mile), Knotty Ash (1 mile) and Croxteth (1 mile)
- Price region
- North West
- Survey
- Free survey (UK mainland)
How we approach extractor fans in West Derby
The rate a fan delivers through a real duct run is often far lower than the number on the box, which is why we size to the room and test the result. For England, Approved Document F gives minimum intermittent extract rates: 15 litres a second for a bathroom, 30 for a kitchen with a cooker hood (60 without one), 30 for a utility room and 6 for a WC.
New fan through an outside wall
Core drilled, sleeved, wired from a fused spur and sealed outside.
Ducted to outside through the loft
Insulated duct to a roof, ridge or soffit outlet so warm moist air does not condense in the loft.
Guide prices in West Derby
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £165–£280 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £330–£525 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £425–£700 inc VAT |
These ranges use our North West rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- The fan is noisy, rattling or has stopped
- The duct ends in the loft rather than outside
- A kitchen with a recirculating hood and condensation on the windows
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 West Derby
What area around West Derby do you work in?
All of Merseyside. Near West Derby that includes Norris Green, Knotty Ash, Croxteth and Old Swan.
How long does fitting a fan take?
A straight replacement takes an hour or two. A new fan with a core-drilled hole or a duct through the loft usually takes half a day.
How much does it cost to fit an extractor fan?
Replacing a fan on an existing duct usually costs £175 to £295 including VAT. A new fan through an outside wall is typically £345 to £545, and a fan ducted to outside through the loft £445 to £745.
Do you cover West Derby and nearby?
Yes. We cover West Derby and nearby places including Norris Green, Knotty Ash, Croxteth and Old Swan. Send your postcode and we will confirm.
What is the price of new extractor fans in West Derby?
Guide prices for West Derby use North West rates: like-for-like extractor fan replacement (existing duct and wiring) is typically £165 to £280 inc VAT per fan. We confirm a fixed price in writing before any work starts.
Send a photo of the existing fan and the outside wall and we will price your West Derby job quickly.
Extractor fans near West Derby
More services in West Derby
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.