Centralised Mechanical Extract Ventilation (MEV) is a whole dwelling ventilation system that supplies and extracts air continuously at a low rate. It is a low energy, continuous mechanical extract ventilation system designed with multiple extract points to simultaneously draw moisture laden air out of the wet rooms (bathrooms and kitchen) providing a quieter and more efficient system compared to separate fans.Centralised Mechanical Extract Ventilation (MEV) is a system where a central unit is mounted in a loft or cupboard and ducted to extract polluted air from the wet rooms of the house. As there is no heat recovery, there is no requirement for any ducts to supply the replacement air. Instead, replacement air enters the home through window vents or airbricks. In many houses however, air naturally enters the building through gaps and cracks in the structure, providing adequate ventilation.The removal of pollutants, such as moisture and build up of indoor air pollutants are all important factors in maintaining good indoor air quality, helping to create a better living environment.With growing concerns about accurate ventilation of properties, the Lo-Carbon Multivent MVDC range offers the option of ‘Close Control’ both in the residential and the commercial sectors. With a DC motor the multi speed Lo-Carbon Multivent is one of the most efficient central extract units available.The units have 3 fully variable speeds: normal, boost and purge. The digital display allows accurate setting of airflow, ensuring exactly the right ventilation rate. Accurate speed control helps minimise noise and energy consumption.Incorporates a built-in humidity sensor to boost the unit when humidity reaches a certain threshold.