Designing energy-efficient buildings

Energy-efficiency in buildings is an important factor to ensure the success of the energy transition. This is why dena advocates favourable market conditions,

energy-efficient services and technologies, thus helping to make buildings fit for the future.

Statistics & facts

21
million buildings
in Germany
35 %
is the share of total energy consumption in Germany
accounted for by buildings
The 80 %
by the end
of 2050
73
billion euro is the amount spent by users
of residential and non-residential buildings in 2014 for heating, hot water, lighting and air conditioning.
Buildings

No energy transition without a heating transition

dena advocates energy-saving building and refurbishment of buildings, thus contributing to the success of the energy transition.

Buildings account for around 35 percent of total energy consumption in Germany. In total, Germans spend roughly 73 billion euros on heating rooms, hot water, lighting and air conditioning in residential and non-residential buildings. Residential buildings are responsible for the lion’s share of energy consumption: 38 percent of all energy consumed in Germany is used in detached and semi-detached homes, while apartment buildings contribute another 39 percent. The remaining 39 percent of total energy consumption is for non-residential buildings.

Buildings offer significant energy-saving potential.

There is significant potential for saving energy in the building sector. Around 63 percent of residential buildings were constructed before the First Thermal Insulation Ordinance was introduced in 1979. In consequence, older houses offer the greatest efficiency potential: they consume up to five times as much energy as new builds erected after 2001, with an average annual energy consumption of approximately 85 kilowatt hours per square metre (kWh/m²a).

Buildings must become more energy-efficient

As part of its ambitious energy efficiency targets, the Federal Government has decided to implement a 20 percent reduction in heating requirements by 2020. By 2050, primary energy requirements are to be reduced by 80%, which would make the portfolio of existing buildings largely climate neutral. For this to happen, it is imperative to double the rate of energy-efficient building refurbishments from currently one to at least two percent.

dena is driving the energy transition

dena is committed to ensuring that the energy transition progresses in the building sector as well. To do so, it initiates pilot projects that confirm the practical utility of energy efficiency measures and advocates improving the quality of planning, implementation and monitoring of the individual measures. dena also develops and manages communication platforms and strategies, as well as political initiatives and events. Acting on the interface between politics and industry, dena is actively engaged in the promotion of greater energy efficiency on the national and international stage.

Projects on the issue buildings

dena Report on Buildings

Buildings offer vast potential for energy savings and energy efficiency. The dena Report on Buildings gives a comprehensive overview on the current energy efficiency of buildings in Germany, and compiles all of the important information in a clear form.

Overview

  • Published annually since 2012
  • The key facts on energy efficiency in buildings, 200 pages
  • Analyses, forecasts and scenarios are presented in clear charts and explained in bullet points
  • Range of topics: from residential and non-residential buildings to  owner and tenant structures  in  the context of political, economic and historical events

Energy-Efficient Building in China

dena has been developing and implementing energy-efficient construction projects in China since 2006. Advanced technology and experience gathered in Germany are adapted and transferred to the conditions in the respective region, using experts on the ground. The aim is to improve the market conditions for energy efficiency technologies, impart knowledge and establish concepts suitable for mass marketing of energy efficiency in China.

Overview

  • Project start: 2006
  • Since 2010, dena has launched 30 pilot projects
  • First efficient house standard introduced in Hebei in 2015
  • Partners: Construction ministries of both countries, the Center of Science and Technology of Construction (CSTC), the  Chinese Society for Urban Studies (CSUS), and various provinces, specialist associations, and German and Chinese companies.

Database of Energy Efficiency Experts for Government Funding Programmes

Investors can consult the Database of Energy Efficiency Experts for Government Funding Programmes to find experts in the area of energy-efficient building and refurbishment.

Overview

  • Project start: 2011
  • Funding bodies: Federal Ministry for Economic Affairs and Energy, KfW Group, BAFA
  • Number of listed experts: over 13,700
  • Number of network partners: 23
  • average queries per month: 56,000

Advising BMWi on energy policies

Since 2016, dena has advised the Federal Ministry for Economic Affairs and Energy on matters of energy policies in its position as framework agreement partner. It provides the consultancy services as the principal contractor, cooperating in this capacity with 14 partners from business and science.

Overview

  • Project start: September 2016
  • Client: Federal Ministry for Economic Affairs and Energy
  • Partners: adelphi, BBH, Best Friend, ecofys, ewi ER&S, Fraunhofer ISI, Frontier, GRS, ifeu, Öko-Institut, Prognos, PwC, SUER, University of Stuttgart (EEP & IER)