This European Standard specifies laboratory methods for measuring the aerodynamic and acoustic performance characteristics and energy consumption of assembled exhaust ventilation system packages for a single dwelling. If a component of the package is not physically linked to the others (e. g. externally/internally mounted air transfer devices), then it is assumed to have been tested according to the test method related to this component. An example of a typical exhaust package is given in Figure 2. The object of this standard is to provide tested characteristics for a system package in worst case conditions. It is assumed that better values are achieved on site when the system package is installed in accordance with the manufacturer's instruction and within the limits of the test conditions given in this standard. Safety requirements are given in EN 60335-2-80.