Isleworth, Greater London
Extractor fan installation in Isleworth
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested. Covering Isleworth and TW3, TW5 and TW7.
- From £210 inc VAT per fan
- Free survey
Many extractor fans in Isleworth homes need replacing because they never extracted properly.
For extractor fan installation in Isleworth, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
Extractor fans in Isleworth at a glance
- Town
- Isleworth, Greater London
- Postcode districts
- TW3, TW5 and TW7
- Nearby
- Osterley (1 mile), Hounslow (1 mile) and Heston (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
How we approach extractor fans in Isleworth
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.
Guide prices in Isleworth
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £210–£355 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £415–£650 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £525–£900 inc VAT |
These ranges use our London rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- 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 that apply 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.
Questions from Isleworth
Is the survey free in Isleworth?
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.
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.
How do I get a price for new extractor fans in Isleworth?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
What area around Isleworth do you work in?
All of Greater London. Near Isleworth that includes Osterley, Hounslow, Heston and Brentford.
Book an Isleworth visit and we will test the fan you have before recommending a new one.
Extractor fans near Isleworth
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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.