Home ventilation, Wiltshire
Extractor fan installation in Wiltshire
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested, across Wiltshire.
- From £180 inc VAT per fan
- Free survey
A common fault in Wiltshire homes is a bathroom fan ducted into the loft instead of outside.
We carry out extractor fan installation across Wiltshire, including Salisbury, Trowbridge, Chippenham, Melksham and Warminster. Prices use South West rates. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
Extractor fans in Wiltshire at a glance
- Area
- Wiltshire
- Towns listed
- 14, largest Swindon
- Postcode districts
- SN2, SP1, SP2, BA13, BA14 and SN13
- 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.
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.
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 Wiltshire
| 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
- A kitchen with a recirculating hood and condensation on the windows
- Mirror still steamed up 20 minutes after a shower
- Mould on the bathroom ceiling or around the window
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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 Wiltshire
- Swindon
- Salisbury
- Trowbridge
- Chippenham
- Melksham
- Warminster
- Calne
- Westbury
- Devizes
- Neston (Wiltshire)
- Corsham
- Tidworth
- Royal Wootton Bassett
- Amesbury
Questions about extractor fan installation in Wiltshire
Which rules apply to ventilation in Wiltshire?
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.
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.
Which towns in Wiltshire do you cover?
All of Wiltshire, including Salisbury, Trowbridge, Chippenham, Melksham and Warminster. If your town is not listed, send the postcode and we will confirm.
Are prices different in Wiltshire?
Our guide prices are adjusted by region. In Wiltshire 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.
Get a guide price online, then we confirm it for your Wiltshire home at the visit.
Other services in Wiltshire
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.