DIN Standards Committee Mechanical Engineering
Fans - Procedures and methods to determine and evaluate the energy efficiency of non-residential unidirectional ventilation units
Abstract
his document applies to unidirectional ventilation units (UVU) with and without filters. It provides procedures and methods for measuring and calculating the energy efficiency and associated characteristics of non-residential unidirectional ventilation units (NRVU-UVU) when driven by electric motors. This document does not apply to: - residential unidirectional and bidirectional ventilation units; - non-residential bidirectional ventilation units; - unidirectional ventilation units with additional air treatment items (e.g. heating- or cooling coils); - axial or centrifugal fans only equipped with a housing; - NRVU-UVU exclusively specified as operating in a potentially explosive atmosphere; - NRVU-UVU exclusively specified as operating for emergency use, for short periods of time, and which comply with the basic requirements for construction works; - NRVU-UVU exclusively specified as operating: - where operating temperatures of the air being moved exceed 100 °C; - where the operating ambient temperature for the motor, if located outside the air stream, driving the fan exceeds 65 °C; - where the temperature of the air being moved or the operating ambient temperature for the motor, if located outside the air stream, are lower than - 40 °C; - where the supply voltage exceeds 1 000 V AC or 1 500 V DC; - in toxic, highly corrosive or flammable environments or in environments with abrasive substances; - NRVU-UVU include a heat exchanger and a heat pump for heat recovery or allowing heat transfer or extraction being additional to that of the heat recovery system, except heat transfer for frost protection or defrosting; - NRVU-UVU classified as range. NOTE 1 For residential unidirectional ventilation units see EN 13142:2021. NOTE 2 For non-residential bidirectional ventilation units see EN 13053:2019. NOTE 3 For unidirectional ventilation units with additional air treatment items (e.g., heating- or cooling coils) see EN 13053:2019.
Begin
2026-05-29
WI
00156317
Planned document number
00156317
