Home ventilation, Cornwall
Extractor fan installation in Cornwall
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested, across Cornwall.
- From £180 inc VAT per fan
- Free survey
Many extractor fans in Cornwall homes need replacing because they never extracted properly.
Our team is based in Great Barr, Birmingham, and we work throughout Cornwall, from Redruth, Falmouth, St Austell, Truro and Camborne. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
Extractor fans in Cornwall at a glance
- Area
- Cornwall
- Towns listed
- 10, largest Redruth
- Postcode districts
- PL5, PL11, TR12, TR13, TR14 and TR15
- Price region
- South West
- Survey
- Free survey (UK mainland)
What extractor fan installation involves
Many existing fans were never doing their job: undersized, ducted into the loft space, fitted with a flex duct crushed in the joists, or switched off by occupants because they were noisy. 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.
Kitchen extract and cooker hoods
A wall or window fan, or a cooker hood ducted outside rather than recirculating.
Like-for-like replacement
A new fan on the existing duct and wiring, often with an overrun timer or humidity sensor.
New fan through an outside wall
Core drilled, sleeved, wired from a fused spur and sealed outside.
Guide prices in Cornwall
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £180–£305 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £360–£575 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £465–£775 inc VAT |
| Inline fan for a shower room or en-suite (loft-mounted, one or two ceiling grilles) (per room) | £575–£925 inc VAT |
| Kitchen extract fan, or cooker hood ducted to outside (per kitchen) | £410–£725 inc VAT |
Guide prices using South West rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- The fan runs but a sheet of toilet paper does not stick to the grille
- The fan is noisy, rattling or has stopped
- The duct ends in the loft rather than outside
Rules in England
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.
How the job runs
- Quick survey
- Choose the fan
- Fit and duct
- Wire
- Test
Towns we cover in Cornwall
Questions about extractor fan installation in Cornwall
Which towns in Cornwall do you cover?
All of Cornwall, including Redruth, Falmouth, St Austell, Truro and Camborne. If your town is not listed, send the postcode and we will confirm.
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.
What size extractor fan does a bathroom need?
In England a bathroom fan should extract at least 15 litres a second, measured at the fan, under Approved Document F. Long or bendy duct runs reduce flow, so the fan often needs to be rated higher than the minimum.
Are prices different in Cornwall?
Our guide prices are adjusted by region. In Cornwall we use South West rates, so like-for-like extractor fan replacement (existing duct and wiring) is typically £180 to £305 inc VAT per fan.
Is the survey free in Cornwall?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
Ask about humidity-controlled fans for your Cornwall bathroom, so it clears itself without anyone remembering.
Other services in Cornwall
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.