What characterizes solar air heating in a solarium?

Solar air heating in a solarium is characterized by being an addition to a structure because it is designed to capture and utilize solar energy to heat air, utilizing the natural light entering through the solarium's windows. This space not only serves aesthetic and leisure purposes but also functions as a supplementary heating system that can enhance the overall energy efficiency of the main building.

As an addition, it typically integrates into existing architecture, providing an environment where solar gain can be maximized while contributing to the heating needs of the connected living spaces. This use of solar energy helps reduce reliance on conventional energy sources, aligning with sustainable practices in HVACR.