HVAC systems play a critical role in maintaining indoor comfort, improving energy efficiency, and ensuring healthy air quality in homes and commercial buildings. Because these systems regulate heating, cooling, and ventilation, their performance directly impacts everyday comfort and long-term utility costs. However, hvac installation is not a simple task—it requires careful planning, accurate system sizing, and technical expertise to ensure everything functions correctly from the start. Understanding the most common installation mistakes is essential for ensuring long-term reliability, efficiency, and performance. Video Source Improper System Sizing and Load Calculation One of the most critical aspects of hvac installation is selecting the…