What are “wet” heating systems?

“Wet” heating systems refer to those that utilize water as the heat transfer medium. In these systems, water is heated in a boiler or similar device and then circulated through pipes to radiators, convectors, or other heating elements throughout a building. This method allows for efficient heat distribution, as water has a high specific heat capacity, meaning it can carry and store a significant amount of thermal energy.

The effectiveness of wet heating systems is enhanced by the ability to maintain stable and consistent temperatures throughout the space being heated. Water is also readily available and can be used in various forms across different heating applications, making it a versatile choice for hydronic systems.

In contrast, the other options focus on different heating methods or mediums, such as air, electricity, and gas, which do not characterize "wet" heating systems. Each of these alternatives has distinct mechanisms and properties that differentiate them from the use of water in heating systems.