Energy efficiency is the key to the future - and Nexiga provides the data basis.
Rising heating costs, growing climate awareness and new legal requirements: The energy efficiency of buildings is no longer a side issue. Whether building, renovating, buying or renting - it not only influences the purchasing power of residents, but also the ecological footprint of entire cities and regions.
But how efficient are our buildings really? And how can this be made measurable and comparable?
The energy efficiency class of a building indicates how high the energy requirement or energy consumption per square meter of heated area is. It is shown on the energy performance certificate and ranges on a scale from A+ (very efficient) to H (very inefficient). A distinction is made between the demand certificate, which determines the calculated energy requirement on the basis of the building envelope and heating technology, and the consumption certificate, which is derived from the measured consumption of the last three years.
This is precisely where Nexiga comes in: using official data, freely accessible data (open data sources) and other information, for example from real estate advertisements and survey data, Nexiga models the respective energy source for over 22 million buildings. Based on this, we calculate the specific final energy demand in accordance with the principles of the requirement certificate in kWh per square meter on the basis of the statutory DIN specifications (DIN V 18599) and assign each building to a specific energy efficiency class.
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Digital energy certificate: Each building is assigned to a specific energy efficiency class. It is a standardized and comprehensive data basis that creates transparency and makes it much easier to compare buildings.
Your benefits with the digital energy certificate per building
The Nexiga data on final energy demand provides you with a reliable basis for:
- Energy assessments of individual buildings or entire portfolios
- Funding and refurbishment advice, targeted and well-founded
- Market analyses for real estate, energy suppliers or financial service providers
- Municipal strategies for sustainable urban development
This makes energy efficiency not only transparent, but also a tangible competitive advantage for your planning, consulting and marketing.
Interactive: Data as a Service using the example of Frankfurt am Main.
Market with potential
In the 3D viewer for Frankfurt a.M., we have assigned an energy efficiency class to residential and mixed-use buildings. Around a third of the purely residential buildings are in classes A+ to C, while another third are classified as E or worse.
Almost 37% of all residential buildings in Frankfurt have the calculated energy efficiency class D. Modern new buildings in Frankfurt usually perform very well, while unrenovated old buildings are generally much lessenergy efficient.
Zoom into the interactive map and take a closer look at the information on each individual building. directly directly.
Making energy efficiency visible - with data from Nexiga
This means: renovation potential is visible. Investing today saves costs in the long term and reduces CO₂ emissions - but only with the right information on each individual building can this potential be measured and used by stakeholders.
The special feature: until now, the heat demand - and therefore the energy efficiency class - could only be determined for residential buildings. Using official cadastral data from the German federal states and specially developed AI algorithms, Nexiga has now also determined the heating requirements of buildings used for commercial purposes - from office buildings to factories. The calculation was carried out separately for space heating and hot water on the basis of the thermal envelope in accordance with DIN V 18599.
The heat demand was determined for cold, warm and average years (based on the last ten years). The result: a complete heat atlas of all heated buildings in every municipality in Germany.
Energy efficiency pays off
Whether you are an owner, investor, local authority or energy supplier: Nexiga's digital energy performance certificate gives you the decisive edge. Evaluate properties in terms of energy efficiency so you can make smart decisions for tomorrow - economically, ecologically and future-proof.
Heat planning 2.0
Efficient heat planning and refurbishment save money, especially in old buildings. Not only the quality of the building envelope (e.g. insulation or window quality), but also the heating technology used are decisive for the demand certificate. Different energy sources and systems have different levels of efficiency: while a gas or oil heating system converts the energy used almost completely into heat, a heat pump also uses environmental heat and can therefore provide several times more heat from one kilowatt hour of electricity. As a result, buildings with heat pumps are often classified as significantly more efficient.
Nexiga data for heat planning:
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Evaluation of all heated buildings: residential and non-residential buildings
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Space heating & hot water: separate calculation and output of the energy requirement for space heating and hot water
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Time comparison: separate values for cold and warm years as well as the average of the last 10 years
