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How does passive solar heating use south-facing windows in winter?

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In a thermoelectric generating system a heat source—usually fueled by coal, oil, or gas—is used within a boiler to convert water to high-pressure steam. The steam expands and turns the blades of a turbine, which turns the armature of a generator, producing electric power. A condenser converts any remaining steam to water, and a pump returns the water to the boiler.
heating In a thermoelectric generating system a heat source—usually fueled by coal, oil, or gas—is used within a boiler to convert water to high-pressure steam. The steam expands and turns the blades of a turbine, which turns the armature of a generator, producing electric power. A condenser converts any remaining steam to water, and a pump returns the water to the boiler.

Passive solar heating utilizes architectural design to maximize the heating effects of sunlight without mechanical systems. In winter, large south-facing windows act as a primary collection point, allowing solar radiation to enter the building and warm the air and interior surfaces, such as brick or tile floors, which absorb the heat and reradiate it at night.1

This process relies on the building's structure and materials to trap heat effectively. Once the sunlight warms the interior, the heat is distributed to other rooms through natural convection. By incorporating these design elements, a well-insulated building can significantly reduce its reliance on conventional fuel sources for heating.1