Ace the Humber/Ontario Real Estate Course 3 Exam 2025 – Your Ultimate Path to Property Success!

The term 'capacity' in the context of heating systems primarily refers to the amount of heat that a heating unit can generate. This measurement is crucial because it determines whether the heating system is adequate for the space it's meant to serve. When assessing heating systems, capacity is often expressed in British Thermal Units (BTUs) per hour. This allows homeowners and professionals to understand how much heating output is available to maintain comfort levels within a structure.

While other options touch on important aspects of heating systems—such as energy efficiency, durability, operational lifespan, and cost reduction—none of these directly address the fundamental meaning of 'capacity.' Those factors are often influenced by or dependent on the capacity of the system, but they do not define it in a directly measurable way as the amount of heat produced does. Thus, focusing on the metric of heat production accurately captures the essence of capacity in heating systems.