This is a good point, but there are going to be similar restrictions on all machines, and duty cycle gets low the smaller you go. My MM211 is rated at 20% on 110V (2 minutes welding every 10 minutes), and 30% on 220V (3 minutes every 10 minutes). The 190 is rated at 30% duty cycle. I have never run into an issue where I overheated my 211. Most of my welds are under 10 seconds; I don't do a lot of long-continuous welds. Now.. you may be doing different things. Maybe you plan on doing structural work on large I-beams or plates... in which case, this machines is not the right one. If you are doing mostly 1/4" or under mild steel, then this machines should be up to the task.