I have learned and appreciated so much from the help this forum has provided with installing our wood stove. I got a lot of great advice on the chimney but now need direction on the hearth. I have almost finished the chimney and will be starting on the hearth soon. I found an old but great condition Jotul Combifire #4 that's going in a finished basement. I had a Combifire nearly 30 years ago, and loved it. But makes me shudder to think how I installed it back then though. This one I'm trying to do right. It is in the center of the house, adjacent to the split entry stairway. It will be in a corner that has an 2x6 insulated outside wall and an uninsulated inside wall. I plan to use durarock with durarock strips to get 1" space away from drywall, Then use large travertine tiles over the durarock. I am using Kenai river rock for the hearth which is on a concrete slab. I have assumed I need 18" of clearance to the combustible walls but lately I'm reading that unlisted stoves require more clearance. Is this old Jotul UL listed? Can someone tell me what clearance I need for this stove? The hearth will extend only 16" in the front but the surrounding floor will also be tiled on top of concrete so I thought I would be ok?