I purchased the 436LiB to replace my 125b 2-stroke gas blower. I was a little apprehensive knowing gas blowers make more power but was pleasantly surprised by the amount of cfm's this put out. I am happy with the battery option, now my son can also use
it. Keep in mind this will not replace our backback blower but does well as intended. It's perfect for the garage and smaller areas with no fumes.