What is Mechanical Extract Ventilation (MEV)?
An MEV (Mechanical Extract Ventilation) or CME (Continuous Mechanical Ventilation) system uses background ventilators, usually trickle ventilators fitted in windows and a centrally located continuously running mechanical extr
act fan with ducts running from the moisture producing areas or “wet rooms” such as kitchens and bathrooms. The background ventilators provide the whole building ventilation and the central mechanical extract fan runs continuously to remove odours and excessive humidity.
A boost facility provides rapid extraction when necessary to remove higher levels of pollutants.
As an alternative, continuously running localised fans, also known as dMEV (decentralised Mechanical Extract Ventilation), ducted to extract areas may be used in place of MEV.
Watch: How Mechanical Extract Ventilation (MEV) works
The Titon CME units are designed and manufactured by Titon in the UK. They are very competitive products, with many unique design features, offering benefits to specifiers, contractors and end users. The highest efficiency model, the CME3 Q Plus, performs to Energy Savings Trust Best Practice levels.
Our MEV range is split into three sections: High Efficiency (the Q Plus range), Basic and Localised.
Specify this product alongside the Titon SFX Sound Attenuator background ventilator to provide a complete sound attenuating ventilation system.
Where can it be used?
Continuous mechanical extract ventilation is used mainly in new build dwellings due to the need to incorporate ductwork within the building fabric. It is particularly suited to dwellings with single facades and for all dwelling that are airtight.
How does it work?
The System uses background ventilators, usually trickle ventilators fitted in windows and a centrally located continuously running mechanical extract fan with ducts running to the moisture producing areas or “wet rooms” such as kitchens and bathrooms.
The background ventilators provide the whole building ventilation and the central mechanical extract fan runs continuously to remove odours and excessive humidity.
A boost facility provides rapid extraction when necessary to remove higher levels of pollutants. As an alternative, continuously running localised fans may be used in place of a centrally located continuously running mechanical extract fan ducted to extract areas.
What benefits does it offer?
- Continuous ventilation at predetermined rates
- Low noise (central extract)
- Discreet (central extract)
- Single penetration to external building fabric (central extract)
What difficulties could we encounter?
- Perceived high running costs, though usually not actual
- Noise potential, especially if ducts are poorly installed
- Ductwork may be difficult to conceal
