Heat Powered Stove Fan Showdown - Flue vs Stovetop

When I first installed the CubicMini Wood Stove in my vintage camper... I also bought the heat-powered fan they sell and recommend. It's the Canadian-made EcoFan CB-800 and it's excellent. It costs about $70 dollars... and moves the heat around my tiny little camper very efficiently and almost silently. The one drawback of this fan, and this would be true of any stovetop fan... is that it takes up most of the room on top of the stove. Which makes it tricky to use the stove for anything else. So for awhile I've been looking at flue-mounted fans as an alternative. Finally decided to buy a cheaper one and do a comparison. The two fans are remark similar with a few notable exceptions. First is the size of the motor. The EcoFan's is substantially larger. Second is the thermoelectric generator that powers the fans. The one on the cheaper generic fan appears to be just slightly larger. Although it was very hard to measure, and they could actually be identical. The main differe...