I've just warmed up to the idea on how the free standing stove begins to radiate the heat by itself at 450*+. THing is, when looking at houses, one had a kiva fireplace in the corner that was enclosed with glass doors with air vents/ ducts below and above. The way I understand it, the free standing stove would be more effective at heating the area/ house than the inset peice, as a fan to circulate the air, hence the need for electricity and all...........