Standard

BS EN 16798-3:2025

Energy performance of buildings. Ventilation for buildings - For non-residential buildings. Performance requirements for ventilation and room-conditioning systems (Modules M5-1, M5-4)

Current

•

Published:

30 Jun 2025

1 Scope

This document applies to the design, energy performance of buildings and implementation of ventilation, air conditioning and room conditioning systems for non-residential buildings subject to human occupancy, excluding applications like industrial processes. It focuses on the definitions of the various parameters that are relevant for such systems.

The guidance for design given in this document and accompanying CEN/TR 16798‑4 are mainly applicable to mechanical supply and/or exhaust ventilation systems. Natural ventilation systems or natural parts of hybrid ventilation systems are not covered by this document.

Applications for residential ventilation are not covered in this document. Performance of ventilation systems in residential buildings is covered in EN 15665 and CEN/TR 14788.

The classification uses different categories. For some values, examples are given and, for requirements, typical ranges with default values are presented. The default values are given in Annex B and a template for national specification is given in Annex A. It is important that the classification is always appropriate to the type of building and its intended use, and that the basis of the classification is explained if the examples given in this document are not used.

NOTE 1 Different standards can express the categories for the same parameters in a different way, and also the category symbols can be different.

Table 1 shows the relative position of this document within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000‑1.

NOTE 2 In CEN ISO/TR 52000‑2 the same Table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying technical reports that are published or in preparation.

NOTE 3 The modules represent EPB standards, although one EPB standard might cover more than one module and one module might be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. See also Clause 2 and Table A.1 and Table B.1.

Table 1 — Position of this standard (in case M5-1, M5-4), within the modular structure of the set of EPB standards

Overarching		Building (as such)		Technical Building Systems
	Descriptions		Descriptions		Descriptions	Heating	Cooling	Ventilation	Humidification	Dehumidification	Domestic hot water	Lighting	Building automation and control	PV, wind, ...
sub1	M1	sub1	M2	sub1		M3	M4	M5	M6	M7	M8	M9	M10	M11
1	General	1	General	1	General			EN 16798‑3
2	Common terms and definitions; symbols, units and subscripts	2	Building Energy Needs	2	Needs
3	Applications	3	(Free) Indoor Conditions without Systems	3	Maximum Load and Power
4	Ways to Express Energy Performance	4	Ways to Express Energy Performance	4	Ways to Express Energy Performance			EN 16798‑3
5	Building Functions and Building Boundaries	5	Heat Transfer by Transmission	5	Emission and control
6	Building Occupancy and Operating Conditions	6	Heat Transfer by Infiltration and Ventilation	6	Distribution and control
7	Aggregation of Energy Services and Energy Carriers	7	Internal Heat Gains	7	Storage and control
8	Building Partitioning	8	Solar Heat Gains	8	Generation and control
9	Calculated Energy Performance	9	Building Dynamics (thermal mass)	9	Load dispatching and operating conditions
10	Measured Energy Performance	10	Measured Energy Performance	10	Measured Energy Performance
11	Inspection	11	Inspection	11	Inspection
12	Ways to Express Indoor Comfort			12	BMS
13	External Environment Conditions
14	Economic Calculation
NOTE The shaded modules are not applicable.

Product Details

Descriptors

Energy consumption

Quality

Classification systems

Performance

Thermal design of buildings

Thermal environment systems

Environment (working)

Thermal comfort

Air-conditioning equipment

Air-conditioning systems

Ventilation equipment

Buildings

Ventilation

ICS Codes

91.120.10 Thermal insulation of buildings

91.140.30 Ventilation and air-conditioning systems

Committee

RHE/2

International relationships

Identical to:

EN 16798-3

ISBN

978 0 539 21306 5

Publisher

BSI