Natural convection within enclosed spaces is a complex phenomenon with significant implications for various engineering and environmental applications. This study investigates the occurrence of multiple solutions in natural convection within an air-filled square enclosure using computational fluid dynamics (CFD) simulations. By varying parameters such as temperature gradients, aspect ratios, and boundary conditions, we explore the emergence of multiple steady-state solutions and their implications for heat transfer and fluid flow patterns. Our findings highlight the importance of considering multiplicity in natural convection phenomena, providing insights into system behavior and guiding the design of more efficient thermal management systems.