BS EN 832:2000BS EN ISO 13790:200405/30133622 DC:2005
Scope
This International Standard gives calculation methods for assessment of the annual energy use for space
heating and cooling of a residential or a non-residential building, or a part of it, referred to as “the building”.
This method includes the calculation of:
a) the heat transfer by transmission and ventilation of the building zone when heated or cooled to constant
internal temperature;
b) the contribution of internal and solar heat gains to the building heat balance;
c) the annual energy needs for heating and cooling, to maintain the specified set-point temperatures in the
building – latent heat not included;
d) the annual energy use for heating and cooling of the building, using input from the relevant system
standards referred to in this International Standard and specified in Annex A.
The building can have several zones with different set-point temperatures, and can have intermittent heating
and cooling.
The calculation interval is either one month or one hour. For residential buildings, the calculation can also be
performed on the basis of the heating and/or cooling season.
This International Standard also gives an alternative simple hourly method, using hourly user schedules (such
as temperature set-points, ventilation modes or operation schedules of movable solar shading).
Procedures are given for the use of more detailed simulation methods to ensure compatibility and consistency
between the application and results of the different types of method. This International Standard provides, for
instance, common rules for the boundary conditions and physical input data, irrespective of the calculation
approach chosen.
Special attention has been given to the suitability of this International Standard for use within the context of
national or regional building regulations. This includes the calculation of an energy performance rating of a
building, on the basis of standardized conditions, for an energy performance certificate. The result can have
legal implications, in particular when it is used to judge compliance with minimum energy performance levels,
which can, for instance, be required to obtain a building permit. For such applications, it is important that the
calculation procedures be unambiguous, repeatable and verifiable. A special situation is the calculation of the
energy performance in the case of old existing buildings, if gathering the full required input would be too
labour-intensive for the purpose, relative to the cost-effectiveness of gathering the input. In this case, it is
important that the calculation procedures provide the right balance between accuracy and data collection
costs. To accommodate the application for these and other situations, this International Standard offers
different choices. It is up to national bodies whether or not to choose a specific option for mandatory use, e.g.
depending on the region in the country, the type of building and its use, and on the purpose of the
assessment.
BS EN ISO 13790:2008 Referenced Document
EN 15217 Energy performance of buildings - Methods for expressing energy performance and for energy certification of buildings
ISO 10077-1 Thermal performance of windows, doors and shutters - Calculation of thermal transmittance - Part 1: General*, 2017-06-01 Update
ISO 13370:2007 Thermal performance of buildings - Heat transfer via the ground - Calculation methods
ISO 13786:2007 Thermal performance of building components - Dynamic thermal characteristics - Calculation methods
ISO 13789:2007 Thermal performance of buildings - Transmission and ventilation heat transfer coefficients - Calculation method
ISO 15927-4 Hygrothermal performance of buildings - Calculation and presentation of climatic data - Part 4: Hourly data for assessing the annual energy use for heating and cooling
ISO 6946 Building components and building elements - Thermal resistance and thermal transmittance - Calculation methods*, 2017-06-01 Update
ISO 7345 Thermal performance of buildings and building components — Physical quantities and definitions*, 2018-03-08 Update
BS EN ISO 13790:2008 history
2017BS EN ISO 52016-1:2017 Energy performance of buildings. Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads. Calculation procedures
2008BS EN ISO 13790:2008 Energy performance of buildings - Calculation of energy use for space heating and cooling
0000 BS EN ISO 13790:2004
0000 BS EN 832:2000
BS EN ISO 13790:2008 Energy performance of buildings - Calculation of energy use for space heating and cooling was changed to BS EN ISO 52016-1:2017 Energy performance of buildings. Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads. Calculation procedures.