1.has top energy efficiency rating
The appliance is either Energy Star Certified, or has an EU energy efficiency rating of A++ or A+++. This means it consumes around 20-30% less energy than is required by the minimum local standards for energy efficiency.
The width represents the horizontal dimension of the product. We consider a smaller width better because it assures easy maneuverability.
3.There is the option to adjust the height of the machine
You can adjust the height of the machine which means that if the floor is uneven you can level it out.
4.annual power consumption
The more power per year a device consumes, the less energy efficient it is, making it more costly over time.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
The height represents the vertical dimension of the product. We consider a smaller height better because it assures easy maneuverability.