Which type of systems are incorporated in the air-conditioning of a manufactured home?

In manufactured homes, the air-conditioning systems are usually integrated directly within the structure itself. These systems are designed to efficiently cool the space without the need for external or portable units. The inclusion of air-conditioning systems within the manufactured home provides consistent temperature regulation and improved comfort for the occupants.

Portable air-conditioning units, while an option for temporary cooling solutions, are not typically standard in manufactured homes, which are generally equipped with built-in systems. Additionally, centralized air-conditioning for an entire park is less common since manufactured homes tend to be independent units with their own climate control systems. The notion that air-conditioning is not allowed in manufactured homes is also incorrect, as these homes are designed to provide the necessary amenities, including air conditioning, so long as they comply with the relevant codes and regulations. Thus, the correct answer emphasizes the integral role of built-in air-conditioning systems within manufactured homes.