This certification scheme covers Air Handling Units (AHU), as stated in the Statement of Principle section I only product with a valid ECP certificate can be NEx certified, therefore the scope of the AHU programme stated in the OM-5 AHU (last version in force) applies for this certification scheme.
Air Handling Unit: A factory made encased assembly or flat-packaged unit that consists of a fan or fans and other necessary equipment to perform one or more of the following functions: circulating, filtration, heating, cooling, heat recovery, humidifying, dehumidifying and mixing of air. The unit should be suitable to be used with ductwork.
Model Box: Construction envelope built according to specifications presented in manufacturer’s literature, used to establish mechanical, thermal and acoustical performance according to the relevant EN standards.
Real Unit: Unit from the range of a specific size, used to establish complete performance for all the available functions of the Air Handing Unit range, according to the relevant EN standards.
Thermal transmittance [W.m-2.K-1]: The heat flow per area and temperature difference through the casing of the air handling unit.
Filter bypass leakage [%]: Air bypass around filter cells as a percentage of rated air volume flow.
Acoustical insulation [dB]: Sound insertion loss value of the Air Handling Unit.
The follwoing requirement categories are included in this programme: