[Linked Image from i.imgur.com]

I have the Oslo in the addition log cabin, and this fireplace in the original log cabin. I built this fireplace with rocks I got out of Bear Creek.
This is a pretty good heater, it is entirely within the house, so that, the back wall of the fireplace is the inside wall of the bathroom.
If I burn this for 5 hours, then shut it off and close the damper, it will put out good heat for 24 hours.

It is a pretty good heater for a fireplace, but not nearly as efficient as the Oslo.