This is called passive solar design because, unlike active solar heating systems, it does not involve the use of mechanical and electrical devices.[1]. The key to designing a passive solar building is to best take advantage of the local climate performing an accurate site analysis.
Best practice design principles for energy efficiency in the Southern Hemisphere.

Passive solar design takes advantage of a buildings site, climate, and materials to minimize energy use.The designer will apply these elements using passive solar design techniques that include direct gain, indirect gain, and isolated gain.

Passive solar design techniques may therefore have a higher first Passive solar design is not new. In fact, ancient cost but are often less expensive when the civilizations used passive solar design.

Furthermore, visual representations like the one above help us fully grasp the concept of Passive Solar Design For Southern Climates.
Buildings that employ passive solar design are built to absorb solar heat during winter days and contain it to provide warmth at night. Overhangs block excessive heat gain during the summer. Natural convection currents move air through the building for ventilation and heat distribution.
Architectural and Technical Illustration - Technical Illustrations | Passive solar design, Solar design, Passive solar heating.Modern Barn Home Designs for a Charming and Timeless Look.
Passive solar design refers to the use of the sun's energy for the heating and cooling of living spaces by exposure to the sun. When sunlight strikes a building, the building materials can reflect, transmit, or absorb the solar radiation.