In November 2014, 12,500 aerial thermal images were taken to analyse heat emissions from all building roofs in the municipality. Further information is available at:
innogy's aerial thermography project is a good example of innovative environmental protection at a municipal level. It uses a special aircraft to take heat images from the air and make the appropriate measurements. Analysis of these thermographic images makes it possible to represent the energy status of all building roofs in a municipality in graphic form. So all property owners in a municipality can benefit from this information, they are given an individual heat image for their own roof once the data has been processed. Every owner can thus see the points in the roof where there are heat leaks, and where new or additional insulation will be necessary.
It is not only the inhabitants who benefit, however – the entire municipality does too. Heat maps provide the municipality with valuable information about its own real estate, as well as an energy footprint for the area covered by the municipality. The project thus contributes to energy savings as a civic service, as well as making a substantial contribution toward climate-friendly and sustainable urban development.
Upon request, the innogy aerial thermography project will also include free energy consultations for local residents.
Successful aerial thermography projects
Heat images were taken during a night-time measurement session in April 2013, and were subsequently made available to interested owners in Arnsberg free of charge. For a detailed report, see:
An aerial thermography session also took place in Lower Saxony in 2015. innogy then helped with interpreting the data, following an extensive technical preparation process, and supported the local authority by offering inhabitants free energy consultations. For further information please visit:
A night-time overflight of Dorsten to take thermography measurements took place in January 2014. The result was a series of 15,000 heat images with a ground resolution of 60 centimetres. For further information, please visit:
Ense was the fourth municipality in North Rhine-Westphalia to improve its energy efficiency using evaluated aerial thermography data. The overflight and subsequent free energy consultation took place in 2014.
Heat images from the fourth-largest city in North Rhine-Westphalia were used to create an “energy footprint” for a large city for the first time. For Essen, the aircraft, a Cessna 404 Titan, had to spend 12 hours making 80 circuits over the city to take photographs of all its 213,259 roofs. Further information is available at:
The launch of aerial thermography for municipalities in Germany took place in Rheinbach in 2012. innogy provided the town with financial and conceptual support.
The town authorities in Wallenhorst, Lower Saxony, also took advantage of the opportunities afforded by aerial thermography to help them draw up energy efficiency measures. The overflight of Wallenhorst was completed in March 2015, with around 5,000 heat images. For further information, please visit
The results of an aerial thermography exercise in 2014 provided the city of Wesel, in North Rhine-Westphalia, with concrete starting points for environmentally aware energy consultations and sustainable building refurbishment activities.