What formula is used to determine the efficiency of a heating system?

The formula for determining the efficiency of a heating system is established by comparing the useful output to the energy consumed. Efficiency is calculated using the output heat generated by the system divided by the total energy input. This calculation reflects how effectively the system converts the input energy into usable heat.

In this context, the correct formula states that efficiency equals the output heat divided by the input energy, multiplied by 100% to express it as a percentage. This means that if a heating system uses a certain amount of energy to produce heat, the efficiency will show how much of that energy is effectively converted into heat that can be utilized for warming spaces.

This method is a standard approach in HVAC systems, as it enables the assessment of how well a heating appliance performs relative to the energy it consumes. A higher efficiency percentage indicates a more effective heating system, which is an essential consideration for energy conservation and cost-effectiveness in HVAC applications.