You're going to have to explain that one in a little more detail. The QA36 auger is moving awefully fast and as soon as it touches the snow is has to accelerate the snow across the whole width of the unit. That takes a lot of power. There is probably 15 pounds of snow flying around and around in there which also takes a lot of power to maintain. All that snow is centrifugally pushed against the housing until it reaches the shute. The 2 stage unit has a fairly slow moving auger that does not contain the snow; it rakes snow into the unit. The impeller accelerates the snow to the exit velocity at the chute. There is far less surface area in the impellor of a 2 stage unit than a single stage = less loss. If both units take in the same amount of snow and throw it the same distance, how is a single stage unit more efficient?
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