Lesson Glossary

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E

Effeciency

The ratio of useful energy output to total energy input, expressed as a percentage. 

Electrical Energy

The energy that is used by an appliance at a given setting; determined by multiplying the power rating of an appliance by the length of time it is used. 

Electrical Power

The rate at which an appliance uses electrical energy. 

EnerGuide Label

A label that gives details about how much energy an appliance uses in one year of normal use.