Warpfive Heat Powered Stove Top Fan for Wood Multi-Fuel Coal Steelhead Eco Stirling Engine

Works great, but unless you have an inferno going on wont spin at top speed. Don't know about the 300 cam advertised though.UPDATE! .. After hours of using, it spins well will minimal heart, fun to watch, and it's a conversation piece, and well made!

As a physics teacher, this fan is very appealing and a pretty good at moving air. It is utterly silent, especially in comparison to the thermoelectric fan that runs next to it.Why not five stars? I don't think it moves as much air as the much cheaper electric fan that sits next to it. This impression may be wrong, however, as the fans have different diameters and clearly move air at different speeds. In terms of cubic feet per minute, it's hard to say. The fan definitely does not move as much air when the stove is at the cooler end of its heating cycle. When the surface temperature drops below 100 C this fan quits while the other one is still running pretty well. The stove has to be VERY hot for this fan to be competitive. So, in short, on sheer performance this fan is not a great value (but it does look cool!)Second, my biggest complaint was in how the fan was packed for delivery. One of the fan blades arrived bent. It was easy to bend back into shape, but it's not quite perfect and always looks a little wonky as it spins. If the Chinese can deliver a 4K flat panel TV around the world in flawless condition for $200 then it doesn't seem unreasonable that a metal fan blade should arrive unbent!Lastly, it's worth mentioning that this fan operates without electricity using a Stirling cycle heat engine. It does not start spinning on its own. Even though we heat with wood and keep the stove running 24/7 for six months it does cool down below 100 C twice a day before loading with wood, requiring someone to flick the fan to start the motor again twice a day. I know.. first world problems, eh?Update after a couple of months of regular use: keeping this fan running is getting more and more challenging. I moved the fan around to find a temperature closer to the high end of the fan's temperature rating and boy did that boost the performance. Unfortunately, it only kept that up for a few days before it started making noise and slowing down. So I cleaned the displacer shaft and touched a bit of oil to it and boom! it was cruising again. Then a few days later it's slow and clonky again. I've tightened the bolts and done everything else I can think of but I'm still stuck in an endless clean and lubricate cycle with this thing. Meanwhile the cheap electric fan from eBay steadily purrs away on its second season of operation..

It takes quite a bit of to heat to get this thing going but it is a beautiful piece of kit. Build quality is superb and its just damn cool

It takes a hot fire to get this unit to work. I really wished this fan would have work on my stove because it looks cool. I have a soapstone top on my wood stove and I think the stone warming up slow with the room made the fan not function properly .

looks good, is quiet, and works as intended.

There's not another one like it except from the same company. Expensive yes, but a beautiful example of function blended with art.

I'm using a Harman Stove (450Lb). This will start to be able to turn after about 225 degrees F. It'll reach a better stride around 400-450F. Machining and finish work is beautifully done. The sound of the fire is louder than this fan is. As far as moving air around the house, it's OK- not amazing. However, I've never had another heat powered fan to compare it. It's a great conversation piece, but not one to have around small children.

The media could not be loaded.  Love this fan. Really does a great job moving the hot air around. This is a really well made piece.

Der Sterling-Ventilator steht bei mir auf der heißen Ofenplatte und hilft die warme Luft etwas zu verteilen.Geliefert wurde er mit etwas verbogenen Rotorblättern, das ließ sich aber richten.Dadurch, dass der Rotor eine Unwucht hat, läuft er nicht geräuschlos sondern stampft vor sich hin.Davon abgesehen ist die Ausführung recht schön. Die ersten Monate lief er recht leicht und zuverlässig mehrere Stunden am Tag. Seither reduziert sich die Leistung kontinuierlich und er lässt sich auch erst bei höheren Temperaturen anwerfen.

I bought this fan partly as an elegant toy and partly to circulate warm air throughout the drawing room. It does both jobs admirably. It is beautifully made and a pleasure to watch. It is not completely balanced so the blades have preferential positions, The result is that the fan requires a slightly greater stove top temperature to operate than would otherwise be the case. It is not completely silent, though not obtrusive. It seems to be quite important to ensure the stove top is completly free of dust or grit so the fan is in good contact with the stove and cannot move. Othewise it can move very slightly and make a very small noise. Perhaps a magnetic base might improve this but the magnet would have to have a high Curie temperature.

First impression : Tested it on the electric stove as it is out of season now. Before arriving my concern was the noise level.This one is not silent running but quieter than one of our old rotating electric meters so should not spoil normal conversation.Might improve later by adjusting the crankshaft assembly as rotation is somewhat out of true. May try pencil graphite lubing as well. Don't think it would be suitable while listening to classical music but for all other aural activity should not be a problem.Will try it on top of up to four 1.25KG iron dumbell disks on the large stove to further protect against temperature fluctuations and increase all that lovely roundness. Quite robust, should withstand more heat abuse than thermoelectric.

so far it is performing well ,and rotates the air as it should

An interesting piece of engineering that looks great, works well and operates quietly. It's good as both a fan and a conversation piece.