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The dishwasher is one of the most energy consuming equipment in the kitchen and 90% of that consumption corresponds to the water heating cycles for washing dishes, and the air for drying.


Dishwashers are equipment that allow considerable savings in the dishwashing process, both in terms of the energy required for the washing process, and in terms of the amount of water needed for that process, and even in terms of the amount of detergent spent .

This equipment, not being the one with the highest consumption (they are surpassed by the drying and washing machines), are household appliances with intensive consumption of energy and water and, as such, they can be the target of improvement and / or more efficient use processes. efficient.

Máquina antiga

Um equipamento de classe D tem um consumo superior a 340 kWh, para uma utilização anual de 280 ciclos, o que equivale a um custo total a partir de 63€.

Máquina A+++

Substituir este equipamento por um semelhante com classe A+++, pode representar um investimento de 380€ e um custo anual de 28€.


Ao substituir a sua máquina de lavar loiça antiga por uma de classe A+++ pode reduzir a sua fatura de energia em 35€.

Other tips
  1. Choose the capacity of your machine according to your needs;
  2. Try to use the machine when it is completely full;
  3. If you need to use the machine with a half load, choose short or economical programs (“eco”);
  4. Good maintenance improves energy performance: clean the filter frequently;
  5. Always keep rinse aid and salt deposits full, as they reduce energy consumption in washing and drying, respectively;
  6. Always prefer the empty periods to wash the dishes, if you have contracted bi-hourly tariff – some machines have programmable operation, alternatively you can use a timer;
  7. Avoid installing the dishwasher next to the refrigerator – its heat and humidity are detrimental to the operation of the refrigerator.
Energy Label

The calculation of the energy class of dishwashers (Delegated Regulation (EU) No. 1059/2010), considers the energy consumption spent in 280 washing cycles in a normal program (approximately 5 washes per week), as well as the consumption in deactivation, off, inactive and standby states.

How to read the energy label:

Maquina Lavar Loiça
  1. Supplier name or trademark
  2. Supplier model
  3. Energy efficiency class
  4. Annual energy consumption in kWh
  5. Annual water consumption in liters
  6. Drying efficiency class
  7. Capacity in tableware services
  8. Noise emission in dB
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