What is BS EN 16798-5-2 - Ventilation for buildings about?
BS EN 16798-5-2 is the second subpart of a fifth part of the multi-series standard that covers energy performance calculation of mechanical ventilation systems with integrated heating/cooling generation, including domestic hot water production, using a monthly or seasonal calculation interval or a bin method. It takes into account the generation (air handling unit) and distribution (duct system) parts.
This method is focused on small, packaged ventilation systems, typically used in residential buildings, although the application is not restricted on the basis of building or space use type. A calculation method for mechanical ventilation and air conditioning systems, including humidification and dehumidification, using an hourly calculation interval or a bin method, is provided in a separate standard, EN 16798-5-1.
Note:
It does not cover the emission part (calculation of the required volume flow rates and/or supply air conditions), which is covered in the M5-5 standard. It does not include humidification and dehumidification.
Who is BS EN 16798-5-2 - Ventilation for buildings for?
BS EN 16798-5-2 on ventilation for buildings is useful for:
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Regulators of EPB standards
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Manufacturer of cooling systems
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Construction industry
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Civil engineer
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Architects
Why should you use BS EN 16798-5-2 - Ventilation for buildings?
BS EN 16798-5-2 is part of a series of standards aiming at international harmonization of the methodology for the assessment of the energy performance of buildings, called “set of EPB standards”.
BS EN 16798-5-2 specifies a method that covers the calculation of:
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The volume flow rates provided to a single ventilation zone (no multi-ventilation zones modelling) served by the system, based on the required values
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The supply air temperature, based on the required values
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The ventilation generation input (electric energy required by fans)
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Heating and cooling input to the air handling unit (to be transferred to the connected heating and cooling distribution systems calculation)
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The recoverable heat or cold losses from ventilation/air conditioning system for heating or cooling
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The ventilation auxiliary energy (electric energy for drives, control devices, actuators, etc.)
BS EN 16798-5-2 helps you to specify the choices between methods, the required input data and references to other standards.
What’s changed since the last update?
BS EN 16798-5-2:2017 supersedes BS EN 15241:2007, which is withdrawn.
The revision includes changes:
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For a rearrangement of content versus EN 15242:2007, in order to better fit in the modular structure given in EN ISO 52000-1:2017
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To cover ventilation systems which are intended for residential buildings (including air heating and air-cooling definition, see the module M5-1 standard)
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For an improved fan energy calculation, taking into consideration control strategies according to CEN/TC 247 and fan product standards /data
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For an improved calculation of heat recovery devices, delivering the efficiency and auxiliary energy depending on the control
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For the consideration of recirculation
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The formatting according to the new rules set in CEN/TS 16629; — the consideration of ISO/TC 205 work performed in the meantime