Devices must have a label declaring their energy consumption performance. A letter is assigned according to this scale and is also distinguished by its red, yellow and green colours.
The scale identifies the consumption to each device by levels, and each level has a letter. C and D are maximum consumption values and A and B are considered optimal consumption. Recommended are those with A+, A++ and A+++ scales.pointing out that besides being low-consumption devices, their savings are also important.
As for the savings that a constantly connected refrigerator in A+++ scale can have instead of this table:
• A+++: 174 kWh
• A++: 284 kWh
• A+: 319 kWh
• A: 374 kWh
• B: 506 kWh
• C: 647 kWh
In other devices, it is recommended to use tools such as timer or operating modes such as economical lighting, which will save your consumption, as you can program the switch-off time. It saves your consumption.
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Source: Exame
