basics:affordability:investing_in_energy_efficiency:superior_thermal_protection_is_affordable
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basics:affordability:investing_in_energy_efficiency:superior_thermal_protection_is_affordable [2010/08/30 12:35] – edit | basics:affordability:investing_in_energy_efficiency:superior_thermal_protection_is_affordable [2019/01/30 13:09] – cblagojevic | ||
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+ | ====== Superior thermal protection is affordable====== | ||
+ | In **new constructions**, | ||
+ | \\ | ||
+ | Most existing buildings were built in the days when heating energy was much cheaper than it is nowadays. **The substance of the building is subject to constant changes including essential maintenance procedures and the modernisation of outdated buildings.** Each of these measures offers the opportunity to adapt inadequate thermal properties of the building to future requirements. Again, thermal insulation measures can be combined with the maintenance measures which are necessary in any case.\\ | ||
+ | \\ | ||
+ | A recent microeconomic study carried out by the Passive House Institute deals with the question of the cost-effectiveness of these measures from the investor' | ||
+ | [[Basics: | ||
+ | * In contrast with an earlier study [[Basics: | ||
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+ | * Besides, today the value-preserving and long-lasting effectiveness of insulation measures are regarded as proven, which why it is correct to apply a life cycle assessment here. | ||
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+ | * In order to avoid speculations about the energy price and interest rate forecasts, the period under observation was limited to 20 years, however the quantifiable recovery value of the substance created was included.\\ | ||
+ | \\ | ||
+ | Within this context, the inferences for Germany are clear: | ||
+ | * ** Improving the thermal protection of the building envelope components in existing buildings in Germany is micoreconomically profitable in each case that was studied**, if the component is not already insulated; e.g. whenever scaffolding is put up for painting the facade or when the roof has to be renewed or restored. | ||
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+ | * **Improvement of thermal protection is profitable on the basis of the energy saved alone**. Other advantages, like increased comfort, better protection of the building substance, increase in value, security against risks of the international energy market and the contribution to climate protection are additional benefits. | ||
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+ | * **Cost-efficiency is so much increased in contrast with the requirements of the currently valid standard [[Basics: | ||
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+ | * **The annual cost of capital (repayment with interest) of the thermal protection measures, which serves as a measure of the economic efficiency, is based on the amount of energy saved**. The price for each kilowatt hour (kWh) of energy saved can be determined in this way. For all individual measures that were studied, the price was between 1 and 3.5 cents/kWh per kWh saved - much less than the final energy price of 4.5 cents/kWh for the year 2005 (see __**Table**__). By the end of 2005 and beginning of 2006, the energy price was already at 5.5 cents/kWh, which is the value assumed as the average future energy price in the study (see [[Basics: | ||
+ | \\ | ||
+ | |{{ : | ||
+ | |// | ||
+ | \\ | ||
+ | With the particularly reasonable development loan from the **the KfW Development Loan Corporation, | ||
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+ | The table also shows that more is better: economising on the insulation thickness in particular does not pay off. Thicker insulation is only slightly more expensive; the greatest part of the investment costs consists of the basic costs for scaffolding, | ||
+ | \\ | ||
+ | The decisive principle which applies to thermal protection is | ||
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+ | **If it has to be done, it should be properly done – don't save on insulation thicknesses!**\\ | ||
+ | \\ | ||
+ | ===== Example ===== | ||
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+ | An example: subsequent insulation using a compound insulation system. | ||
+ | |||
+ | {{: | ||
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+ | ===== Conclusion ===== | ||
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+ | Increased energy efficiency through better thermal protection is one of the most profitable " | ||
+ | \\ | ||
+ | Given this win-win situation, an active initiative for improving the quality as well as the rate of implementation was strongly recommended in the study (see [[Basics: | ||
+ | |||
+ | ===== Literature ===== | ||
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+ | **[EnEV]** Verordnung über energiesparenden Wärmeschutz und energiesparende Anlagentechnik bei Gebäuden (Energieeinsparverordnung - EnEV) vom 7.12.2004 Bundesgesetzblatt Jahrgang 2004 Teil I Nr. 64, S. 3147- 3162.\\ | ||
+ | (**German energy saving ordinance (EnEV)** – regulations for energy-efficient thermal protection and system technology for buildings dated 7.12.2004 in the Federal Law Gazette, Part I, Number 64, pages 3147-3162)\\ | ||
+ | \\ | ||
+ | **[Feist 1998]** W. Feist, Wirtschaftlichkeitsuntersuchung ausgewählter Energiesparmaßnahmen im Gebäudebestand, | ||
+ | (**Economic Feasibility of selected energy efficiency measures in existing building**s, | ||
+ | \\ | ||
+ | **[Kah, Feist 2005]** Wirtschaftlichkeit von Wärmedämm-Maßnahmen im Gebäudebestand 2005.\\ | ||
+ | (**Economic feasibility of thermal insulation measures in existing buildings 2005**; The full version of the study can be found here, in German: {{: | ||
+ | \\ | ||
+ | **[PHI 2008]** | ||
+ | \\ | ||
+ | |||
+ | ===== See also ===== | ||
+ | [[basics: | ||
+ | [[basics: | ||
+ | [[basics: |
basics/affordability/investing_in_energy_efficiency/superior_thermal_protection_is_affordable.txt · Last modified: 2019/05/08 11:48 by cblagojevic