Picea’s fuel cell heating mechanism recovers waste heat from the fuel cell to provide space heating and hot water. The fuel cell operates at 45–55% electrical efficiency, with the remaining energy released as heat. This heat is captured via heat exchangers and used directly in radiators or underfloor heating systems, reducing reliance on conventional boilers. For example, Picea-equipped homes achieve 50% heating cost savings compared to grid-dependent systems. The system’s thermal management also integrates with heat pumps for hybrid heating during extreme cold, ensuring year-round comfort with 100% renewable energy.