What is the main advantage of having a heater in a commercial pool?

The primary advantage of having a heater in a commercial pool is to maintain a comfortable water temperature year-round. This is crucial in ensuring that pool users can enjoy the facility regardless of the season or outdoor temperatures. A well-heated pool enhances the overall swimming experience, attracting more patrons and potentially increasing business during colder months.

While saving on energy costs, improving water clarity, and increasing water circulation are also important aspects of pool management, they do not directly align with the primary purpose of a pool heater. A heater's main function is specifically related to temperature control, making it essential for user comfort and overall pool usage.