What is the difference between single-stage and double-stage snow blowers?
Single stage blowers are designed for handling light to moderate amounts of snow. They cut straight to the ground, meaning they are best for paved surfaces and cannot be used on gravel. Double stage blowers are built for heavy jobs and are better at clearing wet or packed snow. Double stage blowers do not cut all the way to the ground, so they can be used on unpaved surfaces. However, they leave a thin layer of snow behind. Single-stage blowers use only an auger to blow snow (see question below). Double-stage blowers have both an auger and an impeller.