Air-cooled chillers reject heat directly to ambient air using condenser fans, making them simpler and easier to install. Water-cooled chillers transfer heat through condenser water to a cooling tower, achieving higher efficiency for large-scale applications. The right choice depends on project size, climate, and long-term energy cost.

HVAC cooling load calculation determines the amount of heat that must be removed from a building to maintain comfortable indoor conditions. By analyzing factors such as solar heat gain, occupants, lighting, equipment, and ventilation, engineers can accurately size HVAC systems for energy efficiency, reliability, and optimal indoor comfort.

Sizing an Air Handling Unit (AHU) for large buildings is essential for maintaining comfort, ventilation, and energy efficiency. Engineers determine the correct AHU size by analyzing cooling load, airflow requirements (CFM), ventilation standards, coil capacity, and fan static pressure. Proper AHU sizing ensures reliable HVAC performance, better indoor air quality, and reduced energy consumption in commercial buildings such as offices, hospitals, and malls.