Hey guys I’m new to the forum, but I’m running into a issue with my new Jotul Oslo hearth size. I’m putting it into a corner of my house, it going to be double wall pipe and possible a rear heat shield. I’m wondering how big of a CORNER hearth I need? There no durarock or brick on my wall just plan old sheet rock. Also I checked the Manuel and everything I can’t seem to find any info on what size to use. Thanks in advance