Energetic renovation

from Wikipedia, the free encyclopedia

Energy refurbishment , including thermal insulation , usually referred to the modernization of a building to minimize the energy consumption for heating, hot water and ventilation.

Possible remedial measures

Measures designed to minimize energy consumption:

In an energetic renovation, a house should always be viewed as a whole in order to avoid structural damage and to recognize which measures have the best cost-benefit ratio . Many measures can be combined; It is advisable to consult an energy advisor before starting an energetic renovation in order to find an optimal package of measures for the respective building.

The since 2008 prescribed for most types of buildings for sale and re-letting EnEV - Energy Performance Certificate (Building Energy Pass) can be a helpful decision basis for energy-efficient renovation.

State funding

As part of the federal government's first economic stimulus package, KfW has significantly expanded its programs for energy-efficient construction and renovation since January 2009. Since March 1, 2011, it has again been possible to obtain KfW loans for individual energy-related measures. In addition to the possibility of receiving promotional measures for individual energy-related measures, KfW also offers promotional programs for energy-related packages of measures based on the KfW efficiency house standard.

Despite the mediation process between the federal and state governments, which lasted more than a year, there was no agreement in the end on tax subsidies for energy-efficient renovation measures in residential buildings. The idea is off the table because the actors involved could not agree on a cost allocation. Instead, there will be a new KfW program from January 2013. This provides funding for energy-efficient renovations amounting to 300 million euros annually for eight years.

The Tenancy Law Modernization Act, which came into force on March 1, 2013, privileges energetic renovation measures by cutting off tenants' otherwise given right to reduce the rent due to the impairments associated with the measures, Section 536 (1a) BGB .

Cost-benefit ratio

Despite its extensive funding programs, KfW published a report in 2013 on a study that had been carried out, according to which energy-saving renovations would not pay off. According to KfW, the necessary investments for an energetic refurbishment “cannot be financed from the saved energy costs alone”. Accordingly, the costs of 838–953 billion euros would only be offset by benefits of 370–453 billion euros. The Bundestag member Hans-Josef Fell , spokesman for energy of the Bundestag faction Bündnis 90 / Die Grünen had criticized the study because it had set the annual increase in heating costs of around 1.1%, but since then heating costs have increased by around 40% lowered. Many studies only refer to the profitability from the perspective of the owner, who is not obliged to take most of the measures. In the case of demonstrably uneconomical measures, the state offices are obliged to exempt the owner from this obligation. The modernization levy also transfers a possible harmful economic viability to the tenant, who in turn has practically no opportunity to defend himself against it. This particularly affects the tenants, who also save on heating anyway. Even if the surcharge is a multiple of the savings, the tenant still has to tolerate the renovation according to § 555d BGB. With this legal protection, the landlord can expect a return of 11% for the modernization costs after about nine years (paid off by the tenant), which the tenant continues to bear. However, in the case of a renovation, there are usually some maintenance costs that must not be passed on to the tenant. Nevertheless, this profitability harbors the possibility of misuse of the allocation at the expense of the tenant. In some cases the rents increase by up to 63%.

Effects on the tenancy

The costs for an energetic renovation may be converted by the modernization levy by 8% on the annual rent according to § 559 BGB. The usual capping limits for rent increases are left out. The rent increase may also be greater than the actual savings in energy costs for the tenant. As a result, these measures can sometimes lead to very drastic rent increases.

The public funding must be included in this increase.

Serial renovation

The term serial renovation brings together renovation concepts that introduce a type of mass production in renovation by means of prefabrication of modular elements. The use of digital measurement technology and Industry 4.0 technologies is intended to make automation and economies of scale usable. The pioneer here is the Energiesprong concept from the Netherlands.

literature

  • Jürgen Pöschk (Ed.): Energy Efficiency in Buildings - Yearbook 2008 . VME Energieverlag, Berlin 2008, ISBN 978-3-936062-04-5 .
  • Thorsten Hoos: Savings potential and economic analysis of energetic renovation in state buildings in Luxembourg . Shaker Verlag, Aachen 2013, ISBN 978-3-8440-1909-4 .
  • Ji Zhang: Sustainable residential building renovation in Germany and China . Investigation of the conceptual and strategic transfer options . Springer Vieweg, Wiesbaden 2015, ISBN 978-3-658-09754-7 .

Web links

Individual evidence

  1. Energy-efficient renovation - credit (151/152) - For renovation to KfW efficiency house or individual energy-related measures
  2. BMVBS press release ( Memento of March 10, 2016 in the Internet Archive )
  3. Handelsblatt: Energy-efficient renovation is not profitable , March 30, 2013.
  4. KfW study
  5. immowelt.de: Study: Energetic renovation is (not) worth it , April 10, 2013.
  6. Financial tip: rent increase
  7. Focus: Landlords allocate renovation costs - rental price explosion due to renovation