I use either sawdust or pellets in the AMNPS. Both work fine. You can not use both at the same time. Do a search on AMNPS and MES40 and you will get lots of good information and pics. Better than I could put in my reply. Good luck on whatever your choice of smoker is.hi hkeiner, Thks for your answer. do u use the sawdust ? how often do you put the sawdust ? can u post a pic of your smoker ?