The podcast episodes discuss the importance of improving building efficiency and reducing thermal losses to facilitate the energy transition, with a focus on the Passivhaus standard and its potential for transforming existing buildings into highly energy-efficient and comfortable spaces.

The episodes explore the challenges and importance of retrofitting existing buildings, particularly older apartment complexes, with more efficient and sustainable heating and cooling systems, addressing issues of decarbonization, equity, and resilience against extreme weather events.

The episodes provide insights into the process of retrofitting existing buildings to meet the Passivhaus standard and the development of innovative solutions, such as window-mounted heat pumps, to tackle the challenges faced by aging buildings.