I'd measure up for an Oslo, top vented. Download the manual and print up the clearances page to bring with you. Bring a large piece of cardboard that is about the footprint of the stove. and take measurements to see if the Oslo's clearance requirements will work. Note that it's a side loader. According to the manual if it's installed diagonally in the corner, the side door needs to be locked.
I'm not sure if you have room to install the F500 parallel to the wall with the stove pipe, and still honor combustibles clearances. That's why I suggested alternative stoves a few posts earlier. The alternatives have an outside jacket that reduces the clearance requirement. See if the stove shop carries Quadrafire. Also stop by a Napoleon and a Pacific Energy dealer for some other close clearance stoves.
I'm not sure if you have room to install the F500 parallel to the wall with the stove pipe, and still honor combustibles clearances. That's why I suggested alternative stoves a few posts earlier. The alternatives have an outside jacket that reduces the clearance requirement. See if the stove shop carries Quadrafire. Also stop by a Napoleon and a Pacific Energy dealer for some other close clearance stoves.