I bought this to make water that won't kill my herb plants with chlorine. Once I used this and saw what is actually in my water, I use this every day for drinking water. I came back here to order a second jug, just so I dont have to go four hours waiting for the next jug to fill up.If I put my hand over the top, I can feel a warm breeze. I don't notice it otherwise. I guess my AC is working harder.Using this distiller is really easy, until you let the sediment cook onto the empty bottom. The shutoff sensor doesn't trigger until the lack of water creates excess heat. By then, tap water gunk is cemented on the bottom of the basin. But then you just boil more water with a sprinkle of fruit acid and it comes right off.The machine is super stable, and yet lightweight. Excellent design.I haven't figured out what the carbon packs are for.I just love it.