BS EN 12831:2003

FOREWORD
INTRODUCTION
1 SCOPE
2 NORMATIVE REFERENCES
3 TERMS, DEFINITIONS AND SYMBOLS
4 PRINCIPLE OF THE CALCULATION METHOD
5 GENERAL CONSIDERATIONS
6 DATA REQUIRED
7 TOTAL DESIGN HEAT LOSS FOR A HEATED SPACE - BASIC CASES
8 DESIGN HEAT LOAD
9 SIMPLIFIED CALCULATION METHOD
ANNEX A (INFORMATIVE) BASIC PARAMETERS ON HUMAN COMFORT
        IN INTERIOR THERMAL ENVIRONMENTS - SIGNIFICANCE
        OF OPERATIVE TEMPERATURE IN HEAT LOAD
        CALCULATIONS
ANNEX B (INFORMATIVE) INSTRUCTIONS FOR DESIGN HEAT LOSS
        CALCULATION FOR SPECIAL CASES
ANNEX C (INFORMATIVE) EXAMPLE OF A DESIGN HEAT LOAD
        CALCULATION
ANNEX D (NORMATIVE) DEFAULT VALUES FOR THE CALCULATIONS
        IN CLAUSES 6 TO 9
BIBLIOGRAPHY
National Annex NA (informative) - Guidance for the use of
                  BS EN 12831:2003

Includes methods for calculating the design heat loss and the design heat load for basic cases at the design conditions.

This standard specifies methods for calculating the design heat loss and the design heat load for basic cases at the design conditions.

Basic cases comprise all buildings:

• with a limited room height (not exceeding 5 m);

• assumed to be heated to steady state conditions under the design conditions.

Examples of such buildings are: residential buildings; office and administration buildings; schools; libraries; hospitals; recreational buildings; prisons; buildings used in the catering trade; department stores and other buildings used for business purposes; industrial buildings.

In the annexes, information is also given for dealing with the following special cases:

• high ceiling buildings or large enclosure;

• buildings where air temperature and mean radiant temperature differ significantly.