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This is the archive site of Global Sustainability Jam 2011-2018. From 2019 on please visit


Bringing hot water to homeless people during winter.

"People do not realize how much hot water can make a big difference". This quote comes from one of our interviews with homeless people in Berlin. They are around 10000, and in the winter, they really struggle to get hot water, even at the different shelters around the city.
Homeless people also care about their own private space and shelters are seen as hostile environments where there are jealousy, thefts and aggressions.

The team has developed Frank's, an electric van that drives around the city by and brings hot water (solar-powered) to the homeless and provides them a platform to share feedback regarding their needs.

Team members

Creative Commons Licence