Quality built and packaged this nice looking accessory will not move volumes of air but it runs for nothing and looks nice doing it. I have a large quality wood burner so overheating is not an issue. Using the latest formula of extruded Blazers (get them from Costco or Home Depot) and you won't get ripped as locals are charging more. They sell by the pallet at highly discounted prices. The wood back to the fan. This fan should be considered by anybody that has the money and anything but the smallest of wood burners as heat is an issue. The one thing that kept that fifth star from popping is the motor is electric and they are by design, not very heat friendly. The energy source is a thermocouple which works off the difference in the heat on the bottom of the unit and the cooler air in the room. The difference makes the juice that powers the motor. I wish there was a all around better way to accomplish this then an electric motor but in that size and price it's quite cutting edge none the less. We'll see about longevity as their warranty is 1 year and they'll replace it as long as you don't send one to them that's fryed from overheating. Gets the hot air away from the wall in a noiseless fashion. DO NOT put directly in front of the flue as that will fry it and it's in the manual. Off to the side is great. I pointed mine at the flue so cool air was getting pulled into the fan and blown off the sides as my flue go out the top. If you use wood get the thermometer amazon offers in the package. I've had one of those for 15 years and all you do is drill the proper size hole through the flue 2' above the top of the stove where it comes out. It slides in and a magnet holds it in there. That way you can monitor flue temps. Remember, this does not mean the surface is that hot but if you maxing out near a 1000f for any length of time you'll probably have issues. I run around 650-700f so that's probably 550 on the top as I have a large stove with thick walls. There manual talks about oven temps but flue temps prevent roof fires and you extrapolate the top temps by duration.
RE: Reviews stating would not start by itself. Mu flue temps rise fast as I like to get in the clean burn above 500f quick as it keeps the smoke down. Nobody likes a neighbor with a slow burning smoldering mess as that's how you end up with ashes on your car and a lot of creosote buildup. When the top of the stove was to hot to touch it started up. They say 150f and I think that's about right so wait an hour until the stove exterior is toasty and if it fails it's a legit complaint.

I have 3 Ecofans and 1 smaller "VODA 4-Blade Heat Powered Stove Fan" (from Amazon) on top of my woodstove. ALL ARE QUIET. BIG woodstove. Its difficult to accurately tell which one blows more heat because they sit in different locations, they all have different size fan blades and 1 of the Ecofans i rebuilt. I used a 1/4" piece of shredded paper 10" long and held it in front of each of the 4 fans at the same time when the stove was really hot and I really think that the VODA blew the paper strip with more power. If i were on a budget I would get the Voda. If I were a billionaire I would buy BOTH the VODA and the Ecofan Airmax and set them side by side and ask friends to come over and tell me what they thought. I hope this helps.

Very well built. Quality through out. But does not flow the volume of air I was expecting. It could be that none of this type of device does, or maybe I did not get my wood stove hot enough.

This is the only brand of wood stove fans rated up to 650 F degrees. If you buy a cheaper version, it likely will burn out in the first year of use or within a few months of the temp is over the rating for that product. This is the only one I have found that is rated for higher temps and stands up to everyday use. I have had one of these for 3 years now and it is still working great ! don't buy other brands, just spend a few more dollars to get a product that will last you a long time.

I liked the fan. It moved heat away from the stove out into my living room and it was fun to look at, but after a week or so it slowed noticeably and it's no fun to have spent over a hundred bucks and then have to wonder what ails it. I thought I may have damaged it because my stove creeped up to 700 F once or twice and the fan probably sat there for ten or fifteen minutes before I caught it. I'm giving the fan 4 stars when it works because you can't just let it sit there and forget it. You have to babysit the thing. On the other hand, I don't often let my stove get that hot anyway.

Now comes the strange part. The fan slowed to the point that it wouldn't run below 450 and at 650 it just puttered, maybe 100 rpm, not the 8 or 900 it put out when I got it. I searched for answers and found that someone had rebuilt his by taking it apart and putting new cpu paste on the electrical generating plate with great success. I did the same but without the results. Fan still worked, but not below 450.

I took it off the stove and let it sit for a few days and put it back on. Still no change until today, two days later. Suddenly it's working like new. Could be that the paste (arctic silver 5) needed to find some kind of equilibrium. If anyone thinks they have an answer I'd like to hear it. Ecofan provides no help on their website except they promise to send you something if your fan is slowing down and it's still under warranty. I filled out their info and the site said some thing would come but it hasn't. That was over a week ago. If it's a new motor I don't believe I need it. I should take off another star for poor support (these things aren't cheap) but I'm happy it's working again. Go figure.

Update: 1/12
By now the unit has slowed again, or is erratic, and never starts at 150 F the way it should. the motor from Caframo arrived today (shipped from Canada) I did not expect any improvement because of all the posts I have seen that say changing the motor doesn't help, but I put it in anyway and it runs fine, so the motor was the problem all along. I'm grateful for that because replacement thermal units cost $30 plus on EBAY.