I am not sure that I would want to have an electrical fan that close to my wood stove. Our living room is about 16 x 20, with large glass windows on 3 sides. The hearth is in the left rear corner of the room from where the wife and I sit, with the stove sitting across the angle of the corner. The hearth area definitely gets very warm.
We did try a fan a few years ago blowing from the left edge of the hearth area across the stove, with little effect. We also tried it going the other way. Wife could feel a little effect, not much, but what was a pain to listen to the noise of the fan. The TV sits to our right of the stove and the noise was a noticible distraction.
Fast forward to our Ecofan, and it sits on the left rear of the stove, drawing in relatively cooler air from the rear of the stove and pushing the warmer air over the stove out the front area of the stove. It doesn't push as much air as the electrical fan, but there is no fear of melting or damage to the fan by heat, and best of all, there is no noise...I mean none...zero noise.
It will be interesting to see the effect it has as the temps drop this week.
All in all, I am happy with the fan so far and it costs nothing to run 24/7.
And Steve A: as you doing the math, and I was wondering about it as I type the above, we obviously had the same thoughts. Had to edit my post to catch up to you. Have a happy and warm new year!!!