Energy efficiency ratio (EER) is an indicator used to measure the cooling efficiency of electrical appliances such as air conditioners and refrigerators. It is the ratio of cooling capacity (usually in btu hr) to electricity consumption (usually in watts). A higher energy efficiency ratio means that the device can provide more cooling capacity while consuming the same amount of power, which means more energy saving.
An energy efficiency ratio of 328 devices means that for every 1 watt of electricity consumed, 3Cooling effect of 28 btu hr. Although this ratio is not low, whether it really "consumes electricity" needs to be compared with the energy efficiency ratio of other equipment, as well as taking into account other factors in the actual use environment, such as the size of the room, the frequency of use of the equipment, the maintenance status, etc.
Overall, the energy efficiency ratio is 328 units will be more energy-efficient with the same cooling needs. However, if there are options for devices with a higher energy efficiency ratio, then choosing a device with a higher energy efficiency ratio will further save power. When choosing an appliance, taking into account the energy efficiency ratio is an important factor, but it also needs to be considered in combination with other factors.