UNI EN 15459 : 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions, symbols and units
  3.1 Terms and definitions
  3.2 Symbols and units
4 Organisation of the costs
5 Basic calculations
  5.1 Interest rate, discount rate, present value factor
      and annuity factor
      5.1.1 Real interest rate
      5.1.2 Discount rate
      5.1.3 Present value factor
      5.1.4 Annuity factor
  5.2 Global cost
      5.2.1 Principles of the calculation
      5.2.2 Calculation of the final value
  5.3 Annuity calculation
      5.3.1 General
      5.3.2 Annuity calculation for unchanged components
            during the design payback period of the building
      5.3.3 Annuity calculation for replaced components
      5.3.4 Annuity calculation for running costs
      5.3.5 Influence of price development for dynamic
            calculations
6 Principles of the method
  6.1 General
  6.2 STEP 1 - Financial data
      6.2.1 Duration of the calculation
      6.2.2 Financial rate
      6.2.3 Human operation costs
      6.2.4 Energy prices
  6.3 STEP 2 - General information about the project
      6.3.1 Identification of systems
      6.3.2 Environment of the project
      6.3.3 Meteorological and environmental data (not
            mandatory)
      6.3.4 Constraints/opportunity related to energy
  6.4 STEP 3 - Systems characteristics
      6.4.1 Data collection
      6.4.2 STEP 3.1 - Investment costs for systems related
            to energy
      6.4.3 STEP 3.2 - Periodic costs for replacements
      6.4.4 STEP 3.3 - Running costs except energy costs
  6.5 STEP 4 - Energy costs
      6.5.1 General
      6.5.2 STEP 4.1 - Calculation of energy consumption
      6.5.3 STEP 4.2 - Energy costs
  6.6 STEP 5 - GLOBAL COST CALCULATION
      6.6.1 Step 5.1 Calculation of replacement costs
      6.6.2 Step 5.2 Calculation of final value
      6.6.3 Step 5.3 Calculation of global cost
  6.7 STEP 6 - ANNUITY COST CALCULATION
Annex A (informative) - Economical data for energy systems
Annex B (informative) - Systems description
Annex C (informative) - Calculation sheet for global cost
        calculation
Annex D (informative) - Annuity calculation, organisation
        of data and results
Annex E (informative) - Example 1 - Dwelling 100 m[2] with
        gas heating system
      E.1 STEP 1 - Financial Data
      E.2 STEP 2 - General information about project
          E.2.1 Identification of systems
          E.2.2 Environment of the project
          E.2.3 Meteorological and environmental data
                (for information)
      E.3 STEP 3 - System characteristics
          E.3.1 STEP 3.1 - Investment costs for building
                construction and systems related to energy
          E.3.2 STEP 3.2 - Periodic costs for replacements
          E.3.3 Step 3.3 - Running costs except energy costs
      E.4 STEP 4 - Energy costs
          E.4.1 STEP 4.1 - Energy consumption
          E.4.2 Step 4.2 - Energy costs
      E.5 STEP 5 - Global costs
          E.5.1 Step 5.1 and 5.2 - Calculation of replacement
                costs and final value
          E.5.2 Step 5.3 - Global cost report
      E.6 STEP 6 - Annuity calculation costs
Bibliography

Describes a calculation method for the economical issues of heating systems and other systems that are involved in the energy demand and energy consumption of the building.