Home ventilation, Clwyd
Continuous extract fans (dMEV) in Clwyd
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across Clwyd.
- 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.
Every job in Clwyd gets a written quote before it starts and a commissioning record when it finishes. We cover Colwyn Bay, Flint, Rhyl, Hawarden and Rhosllannerchrugog and the villages around them.
dMEV fans in Clwyd at a glance
- Area
- Clwyd, Wales
- Towns listed
- 13, largest Wrexham
- Postcode districts
- CH7, CH4, CH5, LL28, LL29 and CH5
- 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.
Commissioned and recorded
Trickle and boost rates measured and written on a commissioning sheet.
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.
Guide prices in Clwyd
| 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
- An energy retrofit has made the house more airtight
- Building control has asked for continuous extract
- Occupants switch fans off because of noise
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 Clwyd
- Wrexham
- Buckley
- Deeside
- Colwyn Bay
- Flint
- Rhyl
- Hawarden
- Rhosllannerchrugog
- Prestatyn
- Brymbo
- Llandudno
- Abergele
- Mold
Questions about continuous extract fans (dMEV) in Clwyd
Is the survey free in Clwyd?
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.
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 rules apply to ventilation in Clwyd?
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.
Which towns in Clwyd do you cover?
All of Clwyd, including Colwyn Bay, Flint, Rhyl, Hawarden and Rhosllannerchrugog. If your town is not listed, send the postcode and we will confirm.
Other services in Clwyd
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.