Just curious. Virtually ZERO info on the web about them. T-2000 has been around for many years, but the 4000 is EPA certified. Great little stove. Very well made. I think of it as a piece of furniture with a payback. Ours is solid metallic black. Some Thelin's tend to have too much "bling" for my taste, but everyone has their own preferences... If you do have one, let me know how you like it. Thanks.