You may be able to describe a heating system by its ______________.

Describing a heating system by its heat-conveying medium provides valuable insight into how the system operates and distributes heat. This medium can vary among systems, including air, water, steam, or electric elements. For example, a forced-air heating system uses air as the medium, while a hydronic system utilizes water. Understanding the heat-conveying medium helps assess not only how heat is generated and circulated but also the efficiency and suitability of the system for a particular space.

Other aspects like energy efficiency ratings, thermostat controls, and fuel types can also provide information about the system's performance and operational characteristics. However, the heat-conveying medium is fundamental in determining the overall function and mechanism of the heating system, making it an essential descriptor in the evaluation process.