Home ventilation, Mid Glamorgan
Continuous extract fans (dMEV) in Mid Glamorgan
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across Mid 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.
Mid Glamorgan has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.
dMEV fans in Mid Glamorgan at a glance
- Area
- Mid Glamorgan, Wales
- Towns listed
- 14, largest Rhondda
- Postcode districts
- CF43, CF45, CF31, CF32, CF40 and CF41
- 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 Mid 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.
When to get it looked at
- Building control has asked for continuous extract
- Occupants switch fans off because of noise
- Mould keeps returning in a bathroom with a working fan
Rules in Wales
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. We design to the Welsh rates and commission mechanical systems so the results can be recorded.
How the job runs
- Survey
- Specify
- Fit
- Commission
- Record
Towns we cover in Mid Glamorgan
- Rhondda
- Tonypandy
- Bridgend
- Merthyr Tydfil
- Coity
- Pontypridd
- Aberdare
- Maesteg
- Porthcawl
- Llantrisant
- Pyle
- Treharris
- Mountain Ash
- Aberkenfig
Questions about continuous extract fans (dMEV) in Mid Glamorgan
Which rules apply to ventilation in Mid 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.
Is it expensive to run a fan all the time?
No. dMEV fans use very little electricity on trickle speed, typically a few watts, so running costs are low compared with the condensation and mould they prevent.
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.
Which towns in Mid Glamorgan do you cover?
All of Mid Glamorgan, including Rhondda, Tonypandy, Bridgend, Merthyr Tydfil and Coity. If your town is not listed, send the postcode and we will confirm.
Are prices different in Mid Glamorgan?
Our guide prices are adjusted by region. In Mid 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 Mid Glamorgan
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