basics:affordability:investing_in_energy_efficiency:economy_and_financing_of_efficiency_new_buildings_renovation_and_step_by_step_retrofit
Differences
This shows you the differences between two versions of the page.
| Both sides previous revisionPrevious revision | Last revisionBoth sides next revision | ||
| basics:affordability:investing_in_energy_efficiency:economy_and_financing_of_efficiency_new_buildings_renovation_and_step_by_step_retrofit [2016/02/17 09:09] – [Risk and return] kdreimane | basics:affordability:investing_in_energy_efficiency:economy_and_financing_of_efficiency_new_buildings_renovation_and_step_by_step_retrofit [2019/03/20 11:06] – cblagojevic | ||
|---|---|---|---|
| Line 42: | Line 42: | ||
| • Proper attribution of investment costs: only (additional) investments that are imputable to energy efficiency may be accounted for in the economic analysis. Although this seems obvious, the calculation including all the measures’ costs which are often many times higher than the additional investment costs for energy efficiency, is very often the reason for a wrong economic assessment result. | • Proper attribution of investment costs: only (additional) investments that are imputable to energy efficiency may be accounted for in the economic analysis. Although this seems obvious, the calculation including all the measures’ costs which are often many times higher than the additional investment costs for energy efficiency, is very often the reason for a wrong economic assessment result. | ||
| \\ | \\ | ||
| + | |||
| • Life cycle of the measures: make sure that revenues (e.g. saved energy’s costs) yielded after the end of the pay back time are not forgotten. Total life cycle results are what counts.\\ | • Life cycle of the measures: make sure that revenues (e.g. saved energy’s costs) yielded after the end of the pay back time are not forgotten. Total life cycle results are what counts.\\ | ||
| + | |||
| • When calculation periods are longer than the life cycle of the measure or the component, replacement costs must be considered. However, when they are shorter (which is often the case for buildings), residual values must be regarded at the end of the calculation period – instead they are often forgotten. Depending on the lifetime span, the calculation period and the discount rate, residual values can easily be up to 30% or more of the original investment.\\ | • When calculation periods are longer than the life cycle of the measure or the component, replacement costs must be considered. However, when they are shorter (which is often the case for buildings), residual values must be regarded at the end of the calculation period – instead they are often forgotten. Depending on the lifetime span, the calculation period and the discount rate, residual values can easily be up to 30% or more of the original investment.\\ | ||
basics/affordability/investing_in_energy_efficiency/economy_and_financing_of_efficiency_new_buildings_renovation_and_step_by_step_retrofit.txt · Last modified: 2019/03/20 11:08 by cblagojevic