The PHS MEV-H unit from Passive House Systems is a SAP approved, low energy, continous mechanical extract ventilation system designed with multiple extract points to simultaneously draw moisture-laden air out of the wet rooms, whilst minimising the migration of humidity to other rooms.
Mechanical Extract Ventilation (MEV) systems supplied by Passive House Systems. 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.
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.
Some MEV units will include a humidity sensor, designed to increase the fan speed in proportion to relative humidity levels, saving energy and reducing noise
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