Polyhouses, designed specifically for crop cultivation, serve as complex thermodynamic systems where indoor temperature and humidity play pivotal roles in crop productivity. Recognized as multivariable input-output systems (MIMO), this study focuses on unveiling a physically validated polyhouse model capable of operating effectively under diverse seasonal conditions. The primary objective is to refine the accuracy of internal temperature modeling within polyhouse structures. Utilizing mass-energy equations, the dynamics of the polyhouse are simulated, accounting for components that either add or remove energy from the system. Specifically, we examine a forced ventilation polyhouse equipped with cooling pads and water circulation mechanisms aimed at temperature reduction. The temperature of the circulating water, serving as a crucial component, significantly influences the overall simulated dynamics of the polyhouse. By integrating these elements into our model, we aim to provide a comprehensive understanding of polyhouse dynamics, facilitating improved management practices for enhanced crop yields and sustainability.