Home ventilation, South Glamorgan
Continuous extract fans (dMEV) in South Glamorgan
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across South 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 South Glamorgan, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Rhiwbina, Cardiff, Barry, Penarth and Llantwit Major.
dMEV fans in South Glamorgan at a glance
- Area
- South Glamorgan, Wales
- Towns listed
- 6, largest Cardiff
- Postcode districts
- CF11, CF61, CF71, CF5, CF14 and CF14
- 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 South 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
- You manage rental homes and want ventilation that cannot be switched off
- You are refurbishing several wet rooms at once
- An energy retrofit has made the house more airtight
Rules in Wales
In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. 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 South Glamorgan
Questions about continuous extract fans (dMEV) in South Glamorgan
Which towns in South Glamorgan do you cover?
All of South Glamorgan, including Rhiwbina, Cardiff, Barry, Penarth and Llantwit Major. If your town is not listed, send the postcode and we will confirm.
How much does a continuous extract fan cost?
A dMEV fan usually costs £345 to £595 including VAT per room, supplied, fitted and commissioned. Converting several rooms in one visit brings the cost per fan down.
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 prices different in South Glamorgan?
Our guide prices are adjusted by region. In South 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.
Is the survey free in South Glamorgan?
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.
Other services in South 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.