Home ventilation, County Antrim
Continuous extract fans (dMEV) in County Antrim
Quiet low-energy fans that run all the time and boost automatically when humidity rises, across County Antrim.
- From £315 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.
County Antrim 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 County Antrim at a glance
- Area
- County Antrim, Northern Ireland
- Towns listed
- 7, largest Belfast
- Postcode districts
- BT36, BT18, BT37, BT42, BT43 and BT41
- Price region
- Northern Ireland
- 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.
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.
Commissioned and recorded
Trickle and boost rates measured and written on a commissioning sheet.
Guide prices in County Antrim
| Work | Guide price |
|---|---|
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £315–£550 inc VAT |
| Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home) | £135–£270 inc VAT |
Northern Ireland 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.
When to get it looked at
- 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 Northern Ireland
Northern Ireland has its own building regulations, with ventilation guidance in Technical Booklet K. We design to the Northern Ireland guidance and measure the airflow achieved.
How the job runs
- Survey
- Specify
- Fit
- Commission
- Record
Towns we cover in County Antrim
Questions about continuous extract fans (dMEV) in County Antrim
Which rules apply to ventilation in County Antrim?
In Northern Ireland, ventilation is covered by Technical Booklet K of the Building Regulations (Northern Ireland). Workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993.
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.
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.
Which towns in County Antrim do you cover?
All of County Antrim, including Belfast, Lisburn, Newtownabbey, Carrickfergus and Ballymena. If your town is not listed, send the postcode and we will confirm.
Are prices different in County Antrim?
Our guide prices are adjusted by region. In County Antrim we use Northern Ireland rates, so continuous-running extract fan (dMEV) with humidity boost, flow tested is typically £315 to £550 inc VAT per fan.
Other services in County Antrim
Get a guide price in two minutes
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