If you have a wood stove, are you tired of seeing all the heat going up the chimney rather than into the room? Through the miracle of micro chip electronics, from heat differential, we can make a small amount of free electricity to turn a fan and blow the heat from your wood stove out into the room to heat the room much better. This is a great conversation piece, and it is very practical. You will wonder what you ever did without it. Make your wood stove do what you bought it to do.. heat the room!