If you look at my avatar, my Oslo is 1/2 in 1/2 out of my fireplace and I use the side door. Granted the door doesn't open 100% (more like 85%) but over the years I've had no problem side loading it. It is rear vented (not top vented). I'm heating around 1400-1500 sq ft (2 bedrooms are closed in the winter - empty nesters here).
I'll be 1/4 in 3/4 out, so it might work. Probably would not be able to get the big stuff in that way, though
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