I do, and I love them both for different reasons. My owb is a hawkin, and I have a epa Lennox fireplace. The boiler gets fired mid October till mid May. It truly spoils you for easy wood fuel heat and hot water. Load it once or twice in 24 hours clean ashes once a month, constant house at 72. But for WARM COZY drive you out of the house heat nothing can replace a indoor stove or high effecient fireplace. These give a tremendous amount of heat for the small amount of wood they consume, but I could not imagine trying to use it for the primary heat source. It needs small split wood, needs to be tended at least once every 6 hours, and requires the ashes to be delt with once in 48 hours. Also it requires a little burning knowledge, IT tells you when it is ready for the primary to be shut, rush it and you will soot the glass within an hour, do it right and the glass stays clean for a month. Like I said I love them both but if I could only have one it would be the boiler, it is just too easy compared to traditional.