I purchased my HF unit about a year ago, and it is clearly marked as a
20 amp motor. I couldn't believe it. It certainly sounds and sucks like a 20 amp as well. I don't believe that they mean peak amps either. I've never seen a motor marked as such. I've even wondered if mine was a mistake i.e. they mounted the wrong motor!! I too have been very pleased with mine. I've filled the bag up multiple times, and the motor continues to purr. I recommend this unit to anyone who will listen to me drone on.