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Green Plumbing

Category - Caring for Our Planet

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What is the created measure that identifies the energy efficiency of a water heater? Hint: the measure calculates the average daily amount of hot water produced per unit of fuel (e.g., gas or electric) used.

Efficiency score
Water-heating quotient
Energy factor
Temperature effect

Explanation

Answer: C - The energy factor (EF) of a hot water heater indicates its energy efficiency. Higher factors mean higher efficiency - but not necessarily lower operating costs, depending on fuel sources, etc. The EF takes into account heat recovery efficiency, cycling losses, and standby losses (for heaters with storage tanks).

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