The main difference between residential and commercial boilers lies in their size, capacity, and intended usage. Residential boilers are designed for smaller-scale applications, typically heating individual homes or small apartment buildings. They have lower heat outputs and are more compact in size. In contrast, commercial boilers are built to handle larger heating demands, such as those required for office buildings, hotels, schools, or hospitals. They have higher heat outputs, larger physical dimensions, and are capable of handling higher water or steam flow rates. Commercial boilers often incorporate advanced controls and monitoring systems to meet the specific needs of commercial environments. Additionally, commercial boilers may have additional features, such as multiple heating zones, to provide precise temperature control for different areas within a building.