Home ventilation, Scottish Islands
Continuous extract fans (dMEV) in the Scottish Islands
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across the Scottish Islands.
- From £330 inc VAT per fan
- By arrangement
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.
The Scottish Islands 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 the Scottish Islands at a glance
- Area
- Scottish Islands, Scotland
- Towns listed
- 1, largest Stornoway
- Postcode districts
- HS1 and HS2
- Price region
- Scotland
- Survey
- By arrangement, travel quoted first
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 the Scottish Islands
| 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–£285 inc VAT |
Scotland rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job. Travel is quoted separately for this area.
Common reasons people call
- Mould keeps returning in a bathroom with a working fan
- You manage rental homes and want ventilation that cannot be switched off
- You are refurbishing several wet rooms at once
Rules in Scotland
In Scotland, ventilation is covered by the Building (Scotland) Regulations and section 3 of the Technical Handbooks, and most building work needs a building warrant first. We work to the Scottish ventilation standards and record the airflow achieved.
How the job runs
- Survey
- Specify
- Fit
- Commission
- Record
Towns we cover in the Scottish Islands
Questions about continuous extract fans (dMEV) in the Scottish Islands
Which rules apply to ventilation in the Scottish Islands?
In Scotland, ventilation is covered by section 3 of the Building Standards Technical Handbooks. Private rented homes must meet the Repairing Standard, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
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.
Which towns in the Scottish Islands do you cover?
All of the Scottish Islands, including Stornoway. If your town is not listed, send the postcode and we will confirm.
Are prices different in the Scottish Islands?
Our guide prices are adjusted by region. In the Scottish Islands we use Scotland rates, so continuous-running extract fan (dMEV) with humidity boost, flow tested is typically £330 to £575 inc VAT per fan.
Other services in the Scottish Islands
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.