What is a primary consideration in constructing radiators for steam heating systems?

A primary consideration in constructing radiators for steam heating systems is the large heating surface area. This is essential because a greater surface area allows for more efficient heat transfer from the steam inside the radiator to the surrounding air. The design must facilitate the effective dispersal of heat into the space being heated, ensuring that the system operates efficiently and effectively. A larger heating surface means that the radiator can deliver more heat while operating at lower pressures and temperatures, which can be crucial for energy efficiency and comfort in a heating system.

While ruggedness contributes to the durability and longevity of the radiators, and attractiveness or modern appearance may play a role in aesthetic appeal, they do not have the same fundamental impact on the operational efficiency of steam heating systems as the heating surface area does.