kent tile fire install. gettting paperwork together to submit for permit. Doing a corner install and have to make a hearth pad. Thanks to everyone here I have the materials for that figured. now I'm working on the dimensions of it. the ul plate on the back gives measurements. can I still safely use these? read somewhere about ul listings expiring. I have gathered that the front should be 18" not the 16" that it says. Should I use the clearances for an older unlisted stove of 18" all around? Here is a pic of the clearances. The lower one is what I'm trying to go by. I guess my big concern is the back corner clearances. Giving 18" on the sides gives me some room to stack wood and something big enough to be able to replace the stove one day without worry about the hearth I guess.