This podcast describes the development of a passive solar retrofit system by Steve Kenin, a solar pioneer who has been working in the field for over 50 years. Kenin details his journey from early solar experimentation in the 1970s, through the founding of the Solar Room Company, to the development of a new solar thermal cladding system. He emphasizes the affordability and effectiveness of passive solar design and seeks funding to scale his system, hoping to use it to reduce fossil fuel dependence and decarbonize buildings.