Home ventilation, Gwynedd and Anglesey
Continuous extract fans (dMEV) in Gwynedd and Anglesey
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across Gwynedd and Anglesey.
- 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.
We carry out continuous extract fans (dMEV) across Gwynedd and Anglesey, including Bangor and Holyhead. Prices use Wales rates. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
dMEV fans in Gwynedd and Anglesey at a glance
- Area
- Gwynedd and Anglesey, Wales
- Towns listed
- 2, largest Bangor
- Postcode districts
- LL57, LL58 and LL65
- Price region
- Wales
- Survey
- Free survey (UK mainland)
What continuous extract fans (dMEV) involves
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 Gwynedd and Anglesey
| 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 |
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.
Signs it is time to call us
- Occupants switch fans off because of noise
- Mould keeps returning in a bathroom with a working fan
- You manage rental homes and want ventilation that cannot be switched off
Rules 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.
How the job runs
- Survey
- Specify
- Fit
- Commission
- Record
Towns we cover in Gwynedd and Anglesey
Questions about continuous extract fans (dMEV) in Gwynedd and Anglesey
Which towns in Gwynedd and Anglesey do you cover?
All of Gwynedd and Anglesey, including Bangor and Holyhead. If your town is not listed, send the postcode and we will confirm.
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.
Are prices different in Gwynedd and Anglesey?
Our guide prices are adjusted by region. In Gwynedd and Anglesey 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 Gwynedd and Anglesey?
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 Gwynedd and Anglesey
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.