hey i appreciate eveyones response, i think i am making progress with all of this new information, im almost to the finish line.. but one thing i need to mention is no one i know of or heard of has ever switched from the vaporizer that i have now to a unit using a bag, and the air isnt really all that hot, it goes through a water filter before inhaling and it only makes heavy smokers gag, not myself because i only vaporize........ thanks again!