I've always thought that the watts rating didn't make a lot of sense. In my mind, heat = btu's. It is also a unit of measure that I know regarding "a little heat" or "a lot of heat". Has anyone seen what the output of these units are? Coming from a propane smoker background, 10,000 btu's was on the light side and 15,000 btu's was a solid output. My gut tells me that the 700W & 800W elements are going to be in the 5,000 - 7,000 btu range. If anyone sees the information in print, please post.