Energy Saving

When a product is marked with Energy Saving it implies that it saves energy, either through Energy Conservation or Energy Efficiency.

Energy Efficiency refers to using less energy to provide the same service as before, while Energy Conservation refers to reducing energy by making the process smaller or slower. These designers may save energy by reducing heating, cooling lighting e.g. at production site.
They may change the energy source to renewable ones like solar power, windmills et cetera. They may change electric motors in their production (which often stand for up to two-thirds of the electricity used in industrial processes) to a more efficient and energy saving one. They may be working with their logistic system to reduce energy use, starting from the raw material process to the production floor.
They may also invest in installing heat exchangers on their compressors to reuse the electrical energy and transform it into new energy. If you read the ethical info by the designer, you can read the details about what the symbol implies in regards to that specific designer.