It sits on the surface of a wood stove. When the stove heats up, a d.c.
fan blows hot air around your house. The temperature difference between the
base and the heat sink and fan on the top generates enough current to power
the d.c. fan. It is called an EcoFan and is made in Canada. Every time the
unit is dropped, the glass like PN semiconductor device goes NFG. (Like
breaking a piece of glass) The manufacturer wants $48.00 plus tax and
shipping to fix a unit. This is a bit much when a new unit costs about
$100.00. THEY WILL NOT SELL A SEMICONDUCTOR SEPARATE NOR WILL THEY PROVIDE A
PART NUMBER. I suspect it is some kind of house unit manufactured in the
Orient. It has no part number on it. This is a very Canadian way of running
a business. Anyone know where to get a replacement part? I believe the
device could be called a PN Thermoeletric Generator.

VA3JQ