Like it has in it a scrubby unit that uses heat thio burn off the smoke in particular, and other stuff that you don't want Andi that airs that clean hot areas we circulated back to the roast of which is one way it gets rid of smell on emissions and a little bit of cold air is introduced a little bit of the existing areas taken out, run through a HEPA filter on a HEPA filter was also used to filter out the cooling air When you drop rushed into the cooling tray, you know, it's kind of an air roaster with a fixed drum that has a sort of spinning, churning mechanism.