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I.S. EN 12831:2003

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

HEATING SYSTEMS IN BUILDINGS - METHOD FOR CALCULATION OF THE DESIGN HEAT LOAD
Available format(s)

Hardcopy , PDF

Superseded date

07-30-2017

Language(s)

English

Published date

01-01-2003

Preview

For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.

Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

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

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

DocumentType
Standard
Pages
78
PublisherName
National Standards Authority of Ireland
Status
Superseded
SupersededBy

Standards Relationship
NS EN 12831 : 1ED 2003 Identical
SN EN 12831 : 2003 Identical
UNE-EN 12831:2003 Identical
UNI EN 12831 : 2006 Identical
BS EN 12831:2003 Identical
EN 12831 : 2003 Identical
NEN EN 12831 : 2004 AMD 11 2009 Identical
NBN EN 12831 : 2003 Identical
NF EN 12831 : 2004 Identical

S.R. 54:2014 CODE OF PRACTICE FOR THE ENERGY EFFICIENT RETROFIT OF DWELLINGS

EN ISO 10211-2 : 2001 THERMAL BRIDGES IN BUILDING CONSTRUCTION - CALCULATION OF HEAT FLOWS AND SURFACE TEMPERATURES - PART 2: LINEAR THERMAL BRIDGES
EN 673:2011 Glass in building - Determination of thermal transmittance (U value) - Calculation method
EN ISO 10456:2007/AC:2009 BUILDING MATERIALS AND PRODUCTS - HYGROTHERMAL PROPERTIES - TABULATED DESIGN VALUES AND PROCEDURES FOR DETERMINING DECLARED AND DESIGN THERMAL VALUES
EN 12524 : 2000 BUILDING MATERIALS AND PRODUCTS - HYGROTHERMAL PROPERTIES - TABULATED DESIGN VALUES
EN ISO 6946:2017 Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods (ISO 6946:2017, Corrected version 2021-12)
EN ISO 14683:2017 Thermal bridges in building construction - Linear thermal transmittance - Simplified methods and default values (ISO 14683:2017)
CR 1752:1998 Ventilation for buildings - Design criteria for the indoor environment
EN ISO 7730:2005 Ergonomics of the thermal environment - Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria (ISO 7730:2005)
PREN ISO 13790 : DRAFT 1999 THERMAL PERFORMANCE OF BUILDINGS - CALCULATION OF ENERGY USE FOR HEATING
EN ISO 13370:2017 Thermal performance of buildings - Heat transfer via the ground - Calculation methods (ISO 13370:2017)
PREN ISO 10077-2 : DRAFT 2009 THERMAL PERFORMANCE OF WINDOWS, DOORS AND SHUTTERS - CALCULATION OF THERMAL TRANSMITTANCE - PART 2: NUMERICAL METHOD FOR FRAMES
EN ISO 10211-1 : 95 COR 2002 THERMAL BRIDGES IN BUILDING CONSTRUCTION - CALCULATION OF HEAT FLOWS AND SURFACE TEMPERATURES - PART 1: GENERAL METHODS
EN ISO 13789:2017 Thermal performance of buildings - Transmission and ventilation heat transfer coefficients - Calculation method (ISO 13789:2017)
EN ISO 10077-1:2017 Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 1: General (ISO 10077-1:2017, Corrected version 2020-02)

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