A Three-Stage snowblower uses one set of lower speed augers to draw in snow and ice then a second to break it up even more and finally a third higher speed impeller to propel the snow out of the discharge chute.
A Dual or Two-Stage snowblower uses one set of lower speed augers to break up snow and ice and then a second higher speed impeller to propel the snow out of the discharge chute.
A Single-Stage snowblower uses one impeller to break up snow and ice and then propel it out of the discharge chute.
The MTD company is based in Valley City near Cleveland, Ohio. They have been in business for over 80 years. Yard Machines snowblowers are available in Canada at The Home Depot Canada.