1592953269000 1312632483000 term-41741 1616541203115 1312632534000 1616289975019 adlib fitz-online adlib-term-41741 5b832a24-d96d-3d92-9e7c-b541a9eb0a6d 2 1 heating, passive solar heating, passive solar term reference term-41745 adlib-term-41745 0f7f8983-b9c1-39d9-b95f-b4a69ff0bef1 passive solar heating