Global cost - A tool, suggested by the European Commission, to compare the economic effect of energy-related building measures over a given time period (30 years in this case).
Energy-related investment cost - The investment cost for insulation and systems.
Replacement - Additional investment cost if a system's lifetime is shorter than the considered time period.
Residual - If a system's lifetime has not ended with the considered time period, the residual value is considered as negative investment.
Energy - Cost for energy carrier over the time period.
I&M - Cost for inspection and maintenance of the systems.