Extractor fan installation in Kent

Many extractor fans in Kent homes need replacing because they never extracted properly.

Kent has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

Extractor fans in Kent at a glance

Area: Kent
Towns listed: 32, largest Maidstone
Postcode districts: CT2, ME9, ME10, DA11, DA12 and DA1
Price region: South East
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 Kent

Extractor fan installation guide prices in Kent
Work	Guide price
Like-for-like extractor fan replacement (existing duct and wiring) (per fan)	£195–£325 inc VAT
New extractor fan through an outside wall (core drilled, wired, tested) (per fan)	£380–£600 inc VAT
New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan)	£490–£825 inc VAT
Inline fan for a shower room or en-suite (loft-mounted, one or two ceiling grilles) (per room)	£600–£975 inc VAT
Kitchen extract fan, or cooker hood ducted to outside (per kitchen)	£435–£775 inc VAT

Guide prices using South East 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). 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 Kent

Questions about extractor fan installation in Kent

Is the survey free in Kent?

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.

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.

Which rules apply to ventilation in Kent?

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.

Which towns in Kent do you cover?

All of Kent, including Ashford, Canterbury, Maidstone, Gillingham and Chatham. If your town is not listed, send the postcode and we will confirm.

Send a photo of the existing fan and the outside wall and we will price your Kent job quickly.