OMS:
You could start with a browse through IEC TC 59 and work "down" from there.
Basically, for EU use, manufacturers adopt a standard test methodology so comparisons are equitable between brands and models - the so called "ISO" test methods
They use an index that compares the appliance’s energy consumption with its internal volume, to show how energy efficient it is for its size.
OMS:
You could start with a browse through IEC TC 59 and work "down" from there.
Basically, for EU use, manufacturers adopt a standard test methodology so comparisons are equitable between brands and models - the so called "ISO" test methods
They use an index that compares the appliance’s energy consumption with its internal volume, to show how energy efficient it is for its size.
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