Treharris, Mid Glamorgan
Extractor fan installation in Treharris
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested. Covering Treharris and CF45, CF46 and CF82.
- From £165 inc VAT per fan
- Free survey

If the bathroom mirror in your Treharris home stays steamed up, the fan probably is not moving enough air.
Whether the property is in the middle of Treharris or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.
Extractor fans in Treharris at a glance
- Town
- Treharris, Mid Glamorgan
- Postcode districts
- CF45, CF46 and CF82
- Nearby
- Nelson (1 mile), Gelligaer (2 miles) and Mountain Ash (3 miles)
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we approach extractor fans in Treharris
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.
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 Treharris
| Work | Guide price |
|---|---|
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £330–£525 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £425–£700 inc VAT |
| Inline fan for a shower room or en-suite (loft-mounted, one or two ceiling grilles) (per room) | £525–£850 inc VAT |
Guide prices using Wales rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
When to get it looked at
- 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 that apply in Wales
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. Extract rates and commissioning are checked against the Welsh guidance on every job.
Questions from Treharris
How do I get a price for new extractor fans in Treharris?
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.
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.
What area around Treharris do you work in?
All of Mid Glamorgan. Near Treharris that includes Nelson, Gelligaer, Mountain Ash and Bargoed.
Do you cover Treharris and nearby?
Yes. We cover Treharris and nearby places including Nelson, Gelligaer, Mountain Ash and Bargoed. Send your postcode and we will confirm.
We can usually fit a replacement fan in Treharris in a single short visit.
Extractor fans near Treharris
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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.