As others have said Airens, two-stage, gasoline. I saved some $ buying a compact 24" Airens however during big storms this requires me to go out mid-storm and tackle the driveway, and then a second trip later to finish. With a larger model I could have waited. Also I recommend purchasing from a dealer as mine (Small Engine Co.) gives service priority to their customers. Finally, have the dealer do an overall service at least every other fall. Snowblowers have many moving parts that need to be lubricated and adjusted.