BS EN 12831-1:2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Description of the methods
6 Standard method - Heat load of rooms, building
  entities and buildings
7 Simplified method for the calculation of the design
  heat load of a heated space (single rooms)
8 Simplified method for the calculation of the building
  design heat load
9 Compliance check
Annex A (normative) - Input data, structure for default values
Annex B (informative) - Input data, default values
Annex C (informative) - Detailed consideration of thermal bridges
Annex D (informative) - Internal temperatures theta[u] of adjacent
        building entities or adjacent unheated spaces within the same
        building
Annex E (informative) - Equivalent thermal transmittance of building
        elements against ground
Annex F (informative) - Estimation of heating-up power in intermittently
        heated spaces (6.3.4)
Annex G (informative) - External air volume flow through large openings
Bibliography

Defines methods for the calculation of the design heat load for single rooms, building entities and buildings, where the design heat load is defined as the heat supply (power) needed to maintain the required internal design temperature under design external conditions.

This European Standard covers methods for the calculation of the design heat load for single rooms, building entities and buildings, where the design heat load is defined as the heat supply (power) needed to maintain the required internal design temperature under design external conditions. Table 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000 -1. NOTE 1 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 2 The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. See also Clause 2 and Tables A.1 and B.1. (...)