This is a KitchenAid/Hobart design, but built under Whirlpool's ownership. The 21 was a transitional model, so depending on when it was built, it will either have the round Hobart motor, or the square Emerson motor. Either one worked well. The machine has a vacuum flourescent display. I believe it also gives you the option to turn off the water heating if you want. I had it for a while in my kitchen, but traded it in for a tall tub model because I just needed more room and a quieter machine. Quiet this was not!!