Extractor fan installation in Devon

A common fault in Devon homes is a bathroom fan ducted into the loft instead of outside.

If you are anywhere in Devon, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Torquay, Newton Abbot, Exmouth, Barnstaple and Bideford.

Extractor fans in Devon at a glance

Area: Devon
Towns listed: 21, largest Plymouth
Postcode districts: EX9, EX10, EX11, EX14, PL7 and PL21
Price region: South West
Survey: Free survey (UK mainland)

What the work 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 Devon

Extractor fan installation guide prices in Devon
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

These ranges use our South 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

Mould on the bathroom ceiling or around the window
The fan runs but a sheet of toilet paper does not stick to the grille
The fan is noisy, rattling or has stopped

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

How the job runs

Quick survey
Choose the fan
Fit and duct
Wire
Test

Towns we cover in Devon

Questions about extractor fan installation in Devon

Are prices different in Devon?

Our guide prices are adjusted by region. In Devon 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.

Can an extractor fan vent into the loft?

No. A fan should discharge to outside, because warm, moist air dumped in the loft condenses on the cold roof timbers and causes mould and rot there instead.

Should I get a fan with a humidity sensor?

A humidistat fan switches on when the air gets damp and runs until it clears, which suits family bathrooms and rentals where people forget the switch. A continuous-running fan is another good option.

Is the survey free in Devon?

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.

Which rules apply to ventilation in Devon?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

We can usually fit a replacement fan in Devon in a single short visit.