![header thumbnail](/images/img-default-logo.png)
NS EN 12831 : 1ED 2003
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
![header thumbnail](/images/img-default-logo.png)
HEATING SYSTEMS IN BUILDINGS - METHOD FOR CALCULATION OF THE DESIGN HEAT LOAD
01-10-2017
12-01-2013
FOREWORD
INTRODUCTION
1 SCOPE
2 NORMATIVE REFERENCES
3 TERMS, DEFINITIONS AND SYMBOLS
3.1 TERMS AND DEFINITIONS
3.2 SYMBOLS AND UNITS
4 PRINCIPLE OF THE CALCULATION METHOD
5 GENERAL CONSIDERATIONS
5.1 CALCULATION PROCEDURE FOR A HEATED SPACE
5.2 CALCULATION PROCEDURE FOR A BUILDING ENTITY OR
A BUILDING
5.3 CALCULATION PROCEDURE FOR THE SIMPLIFIED METHOD
6 DATA REQUIRED
6.1 CLIMATIC DATA
6.2 INTERNAL DESIGN TEMPERATURE
6.3 BUILDING DATA
7 TOTAL DESIGN HEAT LOSS FOR A HEATED SPACE - BASIC CASES
7.1 DESIGN TRANSMISSION HEAT LOSS
7.1.1 Heat losses directly to the exterior - heat
loss coefficient H[T,ie]
7.1.2 Heat losses through unheated space - heat
loss coefficient H[T,iue]
7.1.3 Heat losses through the ground - heat loss
coefficient H[T,ig]
7.1.4 Heat losses to or from spaces heated at a
different temperature - heat loss coefficient
H[T,ij]
7.2 DESIGN VENTILATION HEAT LOSS
7.2.1 Hygiene - air flow rate V[min,i]
7.2.2 Infiltration through building envelope - air
flow rate V[inf,i]
7.2.3 Air flow rates due to ventilation systems
7.3 INTERMITTENTLY HEATED SPACES
8 DESIGN HEAT LOAD
8.1 DESIGN HEAT LOAD FOR A HEATED SPACE
8.2 DESIGN HEAT LOAD FOR A BUILDING ENTITY OR A BUILDING
9 SIMPLIFIED CALCULATION METHOD
9.1 DESIGN HEAT LOSS FOR A HEATED SPACE
9.1.1 Total design heat loss
9.1.2 Design transmission heat loss
9.1.3 Design ventilation heat loss
9.2 DESIGN HEAT LOAD FOR A HEATED SPACE
9.2.1 Total design heat load
9.2.2 Intermittently heated spaces
9.3 TOTAL DESIGN HEAT LOAD FOR A BUILDING ENTITY OR
A BUILDING
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
B.1 CEILING HEIGHT AND LARGE ENCLOSURE
B.2 BUILDINGS WHERE AIR TEMPERATURE AND MEAN RADIANT
TEMPERATURE DIFFER SIGNIFICANTLY
ANNEX C (INFORMATIVE) EXAMPLE OF A DESIGN HEAT LOAD
CALCULATION
C.1 GENERAL DESCRIPTION OF THE CALCULATION EXAMPLE
C.1.1 Sample building description
C.1.2 Plans of the building
C.1.3 Calculations performed
C.2 PLANS OF THE BUILDING
C.3 SAMPLE CALCULATION
C.3.1 General data
C.3.2 Data on materials
C.3.3 Data on building elements
C.3.4 Data on thermal bridges
C.3.5 Room transmission heat losses
C.3.6 Room ventilation heat losses
C.3.7 Heating-up capacity
C.3.8 Total heat load
C.3.9 Room heat load with the simplified method
C.3.10 Total heat load with the simplified method
ANNEX D (NORMATIVE) DEFAULT VALUES FOR THE CALCULATIONS
IN CLAUSES 6 TO 9
D.1 CLIMATIC DATA
D.2 INTERNAL DESIGN TEMPERATURE
D.3 BUILDING DATA
D.4 DESIGN TRANSMISSION HEAT LOSS
D.4.1 Heat losses directly to the exterior - H[T,ie]
D.4.2 Heat losses through unheated space - H[T,iue]
D.4.3 Heat losses through the ground - H[T,ig]
D.4.4 Heat losses to or from spaces heated at a
different temperature - H[T,ij]
D.5 DESIGN VENTILATION HEAT LOSS - H[V,I]
D.5.1 Minimum external air exchange rate - n[min]
D.5.2 Air exchange rate - n[50]
D.5.3 Shielding coefficient - e
D.5.4 Height correction factor - e
D.6 INTERMITTENTLY HEATED SPACES
D.7 SIMPLIFIED CALCULATION METHOD
D.7.1 Restrictions of use
D.7.2 Temperature correction factor - f[k]
D.7.3 Temperature correction factor - f[delta,theta]
BIBLIOGRAPHY
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.