ICC Commercial Mechanical Practice Exam

A steam heating system is specifically designed to utilize steam as a means of heat transfer. In this type of system, water is heated in a boiler until it becomes steam, which is then distributed through pipes to various radiators or heating units throughout a building. The steam releases its heat as it condenses back into water, warming the surrounding air and spaces.

This method of heating is effective for evenly distributing warmth across larger areas and is often found in older buildings, although modern variants still exist. The use of steam is essential to this system’s operation; without it, the system would not function as intended.

In contrast, electric heating systems use electrical resistance or heat pump technology, forced air systems rely on air circulation through ducts, and radiant heating systems typically use hot water or electric coils. Each of these systems operates on different principles, making steam heating uniquely identifiable by its reliance on steam for the heating process.