Home ventilation, West Glamorgan
Continuous extract fans (dMEV) in West Glamorgan
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across West Glamorgan.
- From £330 inc VAT per fan
- Free survey
A dMEV (decentralised mechanical extract ventilation) fan is a low-energy extract fan that runs continuously at a quiet trickle speed and boosts automatically when it senses humidity or a light switch. Because it never fully switches off, moisture is removed steadily instead of building up between showers.
If you are anywhere in West Glamorgan, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Ystalyfera, Swansea, Neath, Briton Ferry and Gorseinon.
dMEV fans in West Glamorgan at a glance
- Area
- West Glamorgan, Wales
- Towns listed
- 6, largest Swansea
- Postcode districts
- SA9, SA1, SA2, SA7, SA10 and SA7
- Price region
- Wales
- Survey
- Free survey (UK mainland)
How we do it
A dMEV (decentralised mechanical extract ventilation) fan is a low-energy extract fan that runs continuously at a quiet trickle speed and boosts automatically when it senses humidity or a light switch. Because it never fully switches off, moisture is removed steadily instead of building up between showers.
Bathroom and en-suite
Through-wall or ceiling fans with humidity-controlled boost.
Kitchen
Higher-rated continuous fans where a ducted hood is not practical.
Whole-home dMEV upgrade
Every wet room converted at once, with trickle vents checked in the habitable rooms.
Guide prices in West Glamorgan
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £330–£575 inc VAT |
| Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home) | £140–£280 inc VAT |
Wales rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Common reasons people call
- Mould keeps returning in a bathroom with a working fan
- You manage rental homes and want ventilation that cannot be switched off
- You are refurbishing several wet rooms at once
Rules in Wales
In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. Extract rates and commissioning are checked against the Welsh guidance on every job.
How the job runs
- Survey
- Specify
- Fit
- Commission
- Record
Towns we cover in West Glamorgan
Questions about continuous extract fans (dMEV) in West Glamorgan
Which rules apply to ventilation in West Glamorgan?
In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Are continuous fans noisy?
A correctly sized dMEV fan is very quiet on trickle; most people only notice it on boost. Noise usually means the wrong fan or a poor duct.
What is the difference between dMEV and MEV?
dMEV uses one small fan in each wet room. MEV uses one central fan, usually in the loft, ducted to all the wet rooms. Both run continuously.
Which towns in West Glamorgan do you cover?
All of West Glamorgan, including Ystalyfera, Swansea, Neath, Briton Ferry and Gorseinon. If your town is not listed, send the postcode and we will confirm.
Are prices different in West Glamorgan?
Our guide prices are adjusted by region. In West Glamorgan we use Wales rates, so continuous-running extract fan (dMEV) with humidity boost, flow tested is typically £330 to £575 inc VAT per fan.
Other services in West Glamorgan
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.