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This document specifies aerodynamic, acoustic and electrical power performance test methods for unidirectional ventilation units used in residential ventilation systems. This document is applicable to ventilation units: - installed on a wall or in a window without any duct, A category; - installed in the upstream of a duct, B category; - installed in the downstream of a duct, C category; - installed in a duct, or with duct connection upstream and downstream, D category; - with one or several inlets/outlets; - installed in a system with a heat pump for domestic hot water or water for cooling or heating; - which can be used for supply or exhaust. This document does not apply to: - fan assisted cowls which are tested according to EN 13141-5; - mechanical supply and exhaust units which are tested according to EN 13141-7:2021 or EN 13141 8:2021.