International Compliance Association (ICA) Home Inspector Practice Exam

Which heating system utilizes water to transfer heat?

1. Radiant heat

2. Hydronic

3. Forced air

4. Steam radiant

The correct answer is: Hydronic

The hydronic heating system is designed specifically to use water as a medium for transferring heat. In this system, water is heated in a boiler and then circulated through pipes to radiators or underfloor heating systems. As the water moves through these components, it releases heat into the rooms, effectively warming the space. This method is notable for providing consistent and comfortable heat without the noise associated with some other heating systems. While radiant heat refers to heating methods that transmit heat directly from a warm surface to the occupants of a room, it can include various heat sources, not just water. Forced air systems, on the other hand, rely on air movement rather than water to distribute heat, using a furnace to heat air that is then blown through ducts. Steam radiant systems also utilize water, but they specifically involve steam as a heating medium rather than hot water itself. This distinction is important when identifying the specific systems that leverage water for heat transfer, making hydronic the correct choice in this context.