Are vaporizors healthy for your lungs?

ok so i smoke "tobacco" out of a vaporizer occasionally. i know its better then smoking a "cigarette" or a pipe and it gives basically the same feeling. but when i do vaporize it feels like my lungs get cleared out from the damage they take previously. am i siking myself out or do vaporizers actually clear out your lungs. i know one things for sure, i cough Altot and i figure if its not doing any damage thencoughings a good thing.