Heat pumps installed across Germany in 30 days at a fixed price
hansetherm is a Hamburg-based heat pump installer founded in 2023 by Leon Thomsen and Konstantin Lennertz. It handles advice, digital planning, grant applications, financing, installation and maintenance with AI-supported digital processes, its own installation teams and a tradesperson network, and is expanding into photovoltaics, air conditioning and storage. It completed a EUR 10 million seed round, announced in October 2026, with participation from G-FUND and Optima Aegidius Group.
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