i would treat it like any other form of tobacco to be safe.
sounds like its time for you to build a smoking room with its own air system and a good envelope from the rest of the house. every cigar smoker's dream
supposedly 3rd hand smoke (smoke residue) has been found to be bad now, ya hookah isnt burned but there is still residue (if you ever wiped out a washable hose that wasnt washed for a while you've seen the residue)
hajo, please explain to me how secondhand smoke in a home is not bad to others, smoking is bad (yes it has been made to seem a lot worse than it really is but its not good for you) but to say the same smoke that is bad for the smoker is fine for someone right next to them is stupid