I.S. EN 15241:2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 General approach
6 Steady state calculation
  6.1 Basis of the calculation method
  6.2 Air entering through infiltration, passive
      air inlets or windows
  6.3 Air entering through balanced or supply only
      system calculation
      6.3.1 General
      6.3.2 Duct heat losses
      6.3.3 Duct flow losses
      6.3.4 Fan
      6.3.5 heat exchanger
      6.3.6 Mixing boxes
      6.3.7 Pre-heating
      6.3.8 Pre-cooling
      6.3.9 Humidifying in winter
      6.3.10 Dehumidification
7 Implementation of the method
  7.1 General
  7.2 Hourly method
  7.3 Monthly methods
      7.3.1 System with no or low humidity impact
      7.3.2 System with medium or high humidity impact
  7.4 Statistical approach to be applied at national level
Annex A (informative) A simplified model of a Ground
        to Air Heat Exchanger
      A.1 Background and summary
      A.2 Overview of program links, variables,
          Parameters and constants
      A.3 Physical description of the ground to air heat
          x-change model
Bibliography

Specifies the method to calculate the energy impact of ventilation systems (including airing) in buildings to be used for applications such as energy calculations, heat and cooling load calculation.