AI-Generated Summary
Thermondo is a Berlin-based cleantech company founded in 2013 that has become Germany's largest heating system installer, with over 50,000 systems installed to date and more than 1,000 employees — including over 600 permanent tradespeople. The company digitises the entire process of heating system modernisation, from lead generation and sales through financing, subsidy provision, installation, and after-sales service. In 2022, Thermondo stopped selling gas boilers entirely and shifted its focus to heat pumps and photovoltaic systems, positioning itself as a partner for climate-neutral living. The company developed its own heat pump hardware in partnership with design firm PONG and expanded into solar energy through the acquisition of photovoltaic provider FEBESOL in April 2024. In July 2025, Thermondo secured €50 million in special purpose vehicle financing to scale its 'thermondo flex' instalment programme, which allows homeowners to finance heat pump installations over 15 years at a fixed 6% annual interest rate, with monthly payments typically under €300 before government subsidies. The company's in-house software platform coordinates a nationwide installation network, combining digital process excellence with quality management. Thermondo has contributed to savings of over 730,000 tonnes of CO₂ through modernised heating installations since its founding. Investors include Future Energy Ventures, Redstone, and other venture capital firms. The company represents a key player in Germany's building-sector energy transition, making heat pump adoption accessible and affordable at scale.