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

Energy concept for new city quarter

SolWo Königspark GmbH is planning to establish Königspark, an 'energy plus quarter', in Königs Wusterhausen. A new residential city quarter will be built over an area of 330,000 m². dena has developed an energy concept for it.

Overview

  • Project duration: 2015
  • dena developed a comprehensive energy concept
  • by examining various concepts for the supply of heat
  • and assessing cost effectiveness, energy balancing, and implementation

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)

geea – “Allianz für Gebäude-Energie-Effizienz” (Alliance for Building Energy Efficiency)

The “Allianz für Gebäude-Energie-Effizienz” (geea) – “Alliance for Building Energy Efficiency” is a cross-sector consortium of leading enterprises and associations in the field of energy efficiency in buildings.

Overview

  • Project start: 2011
  • Positions and dialogue for greater energy efficiency
  • Implementation of numerous events
  • Participation in various dialogue formats
  • 2016: 5th anniversary
  • 2016: almost 40 members

Individual refurbishment roadmap for residential buildings

The individual refurbishment road map for residential buildings presents the coordinated steps of an energy-efficient refurbishment process. Together with consortium partners, dena is developing an overall methodology for this purpose.

Overview

  • Project start: July 2015
  • Consortium consisting of: dena, ifeu, PHI
  • Client: BMWi
  • Documents developed: Booklets "My refurbishment road map" and "Implementation aid for your measures" for homeowners, brief instructions and manual for energy consultants.

Industrialization of energy-efficient refurbishment of apartment buildings

In Germany, industrial approaches for building refurbishment are still mostly unknown. In order to develop the market for complete refurbishment from a single source, dena is launching the project “Serial refurbishment of apartment buildings”.

Overview

  • Project start: 2017
  • Project term: 3 years
  • Objective: Development of the German market for serial refurbishment
  • Partners: innovative property companies and smart construction companies as well as the Dutch non-profit organisation "Energiesprong"

Campaign “zukunft haus” (“future house”).

What was originally conceived of as a portal for informing and motivating owners in 2003 has now developed into an extensive campaign and a mainstay for stakeholders from the industry and politicians, as well as for the press.

Overview

  • Project start: 2003
  • Over 9,000 newsletter subscribers
  • Approx. 30,000 press reports with a total reach (circulation) of 1.2 billion
  • Turnover of more than 6.3 million information brochures
  • Free hotline: over 100,000 questions on energy efficiency in buildings
  • Website: (consumer) information tailored specifically for a particular target group; over 8 million visitors on central internet platform

Part of the European Energy Network EnR

dena is represented as the German member in the European network of national energy agencies EnR (European Energy Network), and contributes experiences and expertise from Germany.

Overview

  • In 2016 dena held the presidency of EnR.
  • Network of 24 international energy agencies (as of 2018)
  • EnR was founded in 1992.


Check-in Energy Efficiency pilot project

dena's pilot project demonstrates the energy saving potential in the accommodation sector and ways to exploit this potential. Concrete refurbishment properties are to serve as examples of economically, ecologically and socially acceptable concepts for the "hostel of the future".

Overview

  • Project start: 2015
  • Number of participants: 30
  • Funded by: Federal Ministry for Economic Affairs and Energy
  • Partners: Viessmann, Daikin
  • Media partners: Hotel & Technik, Superior Hotel

 

 

German-Ukrainian Efficient House Pilot Project

A building refurbishment project in Ukraine organised by dena, Initiative Wohnungswirtschaft Osteuropa, the East European Housing Industry Initiative, and Kompetenzzentrum Großsiedlungen e.V., Centre of Expertise for Large Housing Estates, has met with enthusiastic response in Ukraine. The focus here is on 20 pilot projects for the energy-efficient refurbishment of apartment buildings in Ukraine.

Overview

  • Project start: 2015
  • 1,000 expressions of interest in participation were received within just a short period of time
  • 20 pilot projects launched in 2016
  • Collaboration of German and Ukrainian partners
  • Funded by the Federal Ministry for Economic Affairs and Energy

Efficient House Pilot Project

The “Efficient House" pilot project by dena has focused on the energy-saving refurbishment of residential buildings since 2003, and of municipal buildings since 2007, with a special focus on schools, to create high standards of energy efficiency.

Overview

  • Project duration: 2003 - 2014
  • energy-saving refurbishment and assessment of over 400 residential and non-residential buildings in Germany
  • over 300,000 m2 of living space refurbished
  • CO2- annual reduction of over 3.7 million tonnes in residential buildings
  • average reduction in energy consumption of 80 percent during the pilot projects
  • 98 of the investors recommend energy-efficient refurbishment