A Trombe Wall is a passive solar building design technique that uses the indirect-gain principle, in which sunlight strikes a surface that collects solar energy and covers thermal mass between the Sun and the space before reaching the structure itself ☀️ The thermal energy (heat) that the mass absorbs from the sun is subsequently transported into the living area. Have you used it in your projects? If you want to learn sustainable design deeply, go to http://ugreen.io/courses | Ugreen_Us