So just checking my measurements here. If I get the Jotul Castine, and use the rear vent option, the entire stove can actually sit free and clear outside the fireplace, radiating all it's heat up into the room. If I get the Oslo, I have to bury some of the stove inside the fireplace. What are the real world differences in having a slightly smaller stove better positioned in the room. (i'm zone heating more than whole house heating).