Home ventilation, Northamptonshire
Extractor fan installation in Northamptonshire
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested, across Northamptonshire.
- From £170 inc VAT per fan
- Free survey
A common fault in Northamptonshire homes is a bathroom fan ducted into the loft instead of outside.
We carry out extractor fan installation across Northamptonshire, including Daventry, Brackley, Desborough, Northampton and Corby. Prices use East Midlands rates. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
Extractor fans in Northamptonshire at a glance
- Area
- Northamptonshire
- Towns listed
- 8, largest Northampton
- Postcode districts
- NN2, NN17, NN18, NN14, NN15 and NN8
- Price region
- East Midlands
- 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.
Inline fans
A quiet fan in the loft serving one or two ceiling grilles in a shower room or en-suite.
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.
Guide prices in Northamptonshire
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £170–£290 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £340–£525 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £435–£725 inc VAT |
| Inline fan for a shower room or en-suite (loft-mounted, one or two ceiling grilles) (per room) | £525–£875 inc VAT |
| Kitchen extract fan, or cooker hood ducted to outside (per kitchen) | £385–£675 inc VAT |
These ranges use our East Midlands rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Common reasons people call
- 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 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 Northamptonshire
Questions about extractor fan installation in Northamptonshire
Which rules apply to ventilation in Northamptonshire?
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.
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.
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.
Which towns in Northamptonshire do you cover?
All of Northamptonshire, including Daventry, Brackley, Desborough, Northampton and Corby. If your town is not listed, send the postcode and we will confirm.
Are prices different in Northamptonshire?
Our guide prices are adjusted by region. In Northamptonshire we use East Midlands rates, so like-for-like extractor fan replacement (existing duct and wiring) is typically £170 to £290 inc VAT per fan.
Tell us how many rooms need fans in your Northamptonshire home and we will quote them together.
Other services in Northamptonshire
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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.