Home ventilation, Powys
Continuous extract fans (dMEV) in Powys
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across Powys.
- 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.
Across Powys the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Newtown.
dMEV fans in Powys at a glance
- Area
- Powys, Wales
- Towns listed
- 1, largest Newtown
- Postcode districts
- SY16
- 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.
Whole-home dMEV upgrade
Every wet room converted at once, with trickle vents checked in the habitable rooms.
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.
Guide prices in Powys
| 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
- 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
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 Powys
Questions about continuous extract fans (dMEV) in Powys
Which towns in Powys do you cover?
All of Powys, including Newtown. If your town is not listed, send the postcode and we will confirm.
Can dMEV fans be fitted where a fan already exists?
Usually yes. Most fit the existing hole or duct, which keeps the cost and mess down.
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.
Are prices different in Powys?
Our guide prices are adjusted by region. In Powys 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 Powys?
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 Powys
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.