I have a question regarding clearances from my insert, I was reading through some posts and think I misinterpreted the law. My insert sets floor level meaning my hearth is not raised ( no toe stubbing ) I was under the impression 16" remained from the wall of the fireplace and I read in here it is supposed to be from the front of the insert. I am ok with that but would like to fix it before my inspector arrives the week after this coming one. My question is do I have to have 16" from the front of the ash lip or can I be 16" from the actual door on the unit. By the way it is a Hampton I300 insert.