Decentralised Mechanical Extract Ventilation (d-MEV) systems provide continuous extraction from individual wet rooms, helping to remove stale, moist air directly at source.
QURO® is a low profile, quiet running, powerful ventilation unit which is flexible to meet the requirements of all wet rooms in a property including a kitchen, bathroom, utility, en-suite and WC.
QURO®-LC is a low profile, quiet running, powerful ventilation unit which includes multiple speed options providing flexibility to meet the requirements of all wet rooms in a property including a kitchen, bathroom, utility, en-suite and WC.
The INFINITY 8 is a continuous running extractor fan suitable for WCs, bathrooms, utility rooms and kitchens. It is a major advancement in extractor fan technology; it utilises a centrifugal impeller and our Intellitrac technology which ensures extremely high airflow performance and humidity levels are controlled all year round.
The CYCLONE 8 is a continuous running extractor fan suitable for WCs, bathrooms, utility rooms and kitchens. It is a major advancement in extractor fan technology; it utilises a centrifugal impeller and our Intellitrac technology which ensures extremely high airflow performance and humidity levels are controlled all year round.
The FILTERLESS FAN is a continuous running extractor fan suitable for WCs, bathrooms, utility rooms and kitchens. It is a major advancement in extractor fan technology; it utilises a centrifugal impeller and our Intellitrac technology which ensures extremely high airflow performance and humidity levels are controlled all year round.
The ECO DMEV+ is a continuous running decentralised extract fan that is suitable for wall and ceiling installations, designed to solve ventilation problems in all domestic wet rooms. It has been designed and developed to offer the market a fan with constant volume, low power consumption, low noise levels and low life-cycle costs.
The ECO DMEV+LC is a decentralised extract fan that can run be ran either continuously or intermittently. It is suitable for wall and ceiling installations, designed to solve ventilation problems in all domestic wet rooms. The ECO DMEV+ has been designed and developed to offer the market a fan with constant volume, low power consumption, low noise levels and low life-cycle costs.
Decentralised Mechanical Extract Ventilation (d-MEV) fans are continuously running, two-speed single-room extract fans. They are used to continuously remove stale, moist air from specific areas of a building and can include humidity and usage sensors. These are installed in each wet room, typically through-wall, although there are options to ceiling mount and, in some cases, window mount these fans where appropriate. d-MEV units are usually offered in a 100mm size and have low noise levels with a variety of features including a timer, humidity sensor, pullcord, PIR sensor and innovative on-unit displays.
These units are designed to be flexible, with each fan able to meet the requirements of differing airflows in every wet room, from 13l/s for a kitchen to 8l/s for a bathroom or utility room and 6l/s for a toilet, providing a uniform approach to ventilation. There is a small amount of background ventilation required, totalling 4000mm² per habitable room, to cover areas not directly ventilated by the units.
Frequently Asked Questions
Decentralised Mechanical Extract Ventilation. These are single extract fan units located in each wet room in a property (kitchen, bathroom, utility and WC) out to atmosphere. These units can be ceiling, wall or window mounted, and either installed straight through a wall or have a length of ducting out to atmosphere.
Mechanical Extract Ventilation is the use of a centralised unit (sometimes written as c-MEV), which involves a single centralised unit in a space such as a loft or storage area. This unit is then ducted into each wet room with a single point of extraction from the unit to atmosphere. d-MEV involves the use of single de-centralised units in each wet room that are either ducted or installed out to atmosphere.
Decentralised Mechanical Extract Ventilation units are designed to run continuously at a low or background rate. The units will boost when required; sometimes this may be via a humidity sensor or a timer. The boost speed is temporary and is designed to remove stale, humid air. d-MEV units are set up based upon the property's airflow calculations, which often involves a system design, according to which the units are then set up and commissioned.
Some Decentralised Mechanical Extract Ventilation units come with a timer, in-person PIR, humidity or pullcord to vary the speed of the units, such as our QURO and Eco-dMEV+/LC units. Some units may also have app or remote controllability.
There is a small amount of background ventilation required when using Decentralised Mechanical Extract Ventilation units, which is to have 4,000mm² in each habitable room (living, bedroom or study areas). This is to cover areas that are not ventilated by the d-MEV system and provide adequate crossflow of air into the property. A typical single trickle vent found above a window is 2,500mm², so two of these (or potentially a single larger option) would be acceptable.
Decentralised Mechanical Extract Ventilation units are suitable for properties with any level of air tightness. They have the advantage of not necessarily requiring a ducting run, depending upon the installation and property layout. These make the d-MEV option a flexible and popular ventilation solution.
Decentralised Mechanical Extract Ventilation units are recommended for both new build and retrofit properties and are commonly installed to replace older intermittent fans or those not up to current regulations.
