Continuous extract fans (dMEV) in Aberdeen and Aberdeenshire

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.

Aberdeen and Aberdeenshire 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 Aberdeen and Aberdeenshire at a glance

Area: Aberdeen and Aberdeenshire, Scotland
Towns listed: 8, largest Aberdeen
Postcode districts: AB11, AB42, AB10, AB11, AB51 and AB43
Price region: Scotland
Survey: Free survey (UK mainland)

What the work involves

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 Aberdeen and Aberdeenshire

Continuous extract fans (dMEV) guide prices in Aberdeen and Aberdeenshire
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

These ranges use our Scotland rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

Common reasons people call

You are refurbishing several wet rooms at once
An energy retrofit has made the house more airtight
Building control has asked for continuous extract

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 Aberdeen and Aberdeenshire

Questions about continuous extract fans (dMEV) in Aberdeen and Aberdeenshire

Are prices different in Aberdeen and Aberdeenshire?

Our guide prices are adjusted by region. In Aberdeen and Aberdeenshire we use Scotland rates, so continuous-running extract fan (dMEV) with humidity boost, flow tested is typically £330 to £575 inc VAT per fan.

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.

Is the survey free in Aberdeen and Aberdeenshire?

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.

Which rules apply to ventilation in Aberdeen and Aberdeenshire?

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.