Single-Stage vs. 2-Stage Gas Snow Blowers

How they work & how much snow they can handle

Man using snowblower in winter storm
Monica de Moss / Getty Images

Electric snow blowers can be a smart choice to remove snow for small driveways, where you will not mind dragging the cord around for a bit. For longer driveways, however, gas snow blowers are the preferred option. They are also a better choice in regions subject to heavy snowfalls.

But to zero in on the particular model right for you, we must draw a further distinction, this time between two different types of gas snow blowers.


Snow blowers (also termed "snow throwers") fall into two categories:

  • Single-stage models
  • Two-stage models

Gas snow blowers are available in both single-stage and two-stage models, but with electric snow blowers, you are restricted to the single-stage option. Whether you are interested in gas snow blowers or electric snow blowers, single-stage snow blowers are not recommended for regions prone to heavy snowfalls or wet snow: they just do not provide enough power. With a single-stage model, do not expect to be able to clear more than an 8-inch snowfall (two-stage models can handle much more). And forget about clearing wet snow all together, without doing a lot of extra work.

So what is all this talk of "stages" about, you ask? In what sense does one type of gas snow blower have two stages, while the other type has but one? Well, it is all in the "auger."

An auger is the corkscrew-shaped component of a snow blower responsible for sucking up the snow. In single-stage models, the auger performs double-duty: it both sucks up and discharges the snow. Whereas in two-stage models, the auger is devoted exclusively to the task of sucking up the snow off the driveway while a separate gizmo, called the "impeller", is responsible for discharging the snow out of the chute. This "division of labor," if you will, allows you to blow the snow a greater distance with two-stage gas snow blowers.

Other Advantages of 2-Stage Gas Snow Blowers

With single-stage models, the spinning auger cuts into the snow gathers it up and blows it out of the discharge chute. Though technically not self-propelled (that is, by the engine), the action of the auger does have the effect of driving the snow blower forward as it comes into contact with the driveway surface (the operator simply has to steer it).

But with two-stage gas snow blowers, the auger that sucks up the snow does not contact the clearing surface, meaning you can do your snow blowing even on crushed stone or gravel driveways. However, there is a flip side to the augur not contacting the surface: unfortunately, a thin coating of snow will be left behind.

The superiority of two-stage gas snow blowers goes beyond the matter of augers and impellers. Their clearing width is also greater, ranging from about 20 inches to about 36 inches, depending on the model. And engine-driven wheels (or, in some cases, tracks) propel two-stage gas snow blowers for you, making them easier to use.

Low-End vs. High-End Models

Before you can appreciate all your options in deciding between the various gas snow blowers on the market, you must understand yet another distinction, this time between:

  • Low-end two-stage models
  • High-end two-stage models

In addition to other features, what "separates the men from the boys" is horsepower. At the low end are machines with 5.5 hp; at the high end, 9 hp.


Of course, you will pay the most for high-end two-stage gas snow blowers, because of all their advantages. While it is possible to buy electric snow blowers for a little over $100, high-end two-stage gas snow blowers sell in the $1,000 to $2,000 range.

When shopping for two-stage gas snow blowers, it is important for you to determine ahead of time just how much of a wonder-machine you really need. Otherwise, you could end up spending more money than you really need to spend.

Article Sources
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  1. Snow Blower Buying Guide. Consumer Reports