e
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gy
e
ffi
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Comparative
more energy-efficient
Superlative
most energy-efficient
1
(of a product or system) using less energy while still achieving the same level of performance or output
- The new refrigerator is much more energy-efficient than the old model.
- Energy-efficient buildings help reduce overall heating and cooling costs.
- She invested in energy-efficient light bulbs to lower her electricity bill.
- The company prides itself on producing energy-efficient appliances.
- Solar panels are an energy-efficient solution for generating electricity.