HVAC engineering is essential for maintaining healthy indoor environments through proper airflow, temperature regulation, and humidity control. Advanced HVAC systems help remove pollutants, allergens, and excess moisture while delivering consistent comfort in homes and workplaces. HVAC engineers design systems that balance energy efficiency with effective ventilation, helping occupants enjoy cleaner air and improved living conditions. As indoor environmental quality becomes more important, HVAC engineering continues to support healthier and more sustainable buildings.