Weyderk Wood Stove Fan Heat Powered, 5 Blades Non Electric Ecofan, Thermoelectric Fireplace Cocoon fans for Log/Wood/Pellet Buring stoves, Save Fuel&Efficient Heat Transfer (With Thermometer)

After much research on deciding which stove fan to use with my new Buddy heater, I decided on this five blade unit. With 6.25 inch diameter and about a .5 inch blade pitch, I figured this fan would move a lot of air. The smaller, two fan units, just do not have enough blade/air contact area with their smaller blades to move sufficient air. The blades did need some gentle alignment after shipping, but, overall it arrived OK. To alleviate stressing the motor shaft, I used a pair of vise-grips, gently clamped on the outer blade hub, when I tweaked any blade into alignment to keep from the blade bending movement from stressing the motor shaft. The fan did work really well when new, but, inquiring minds want to know - if any heat sink grease was used on the TEG module which is NECESSARY for proper operation and a long life. To disassemble, the blades need to be removed and if I remember correctly, a PROPERLY FITTING 2.5mm Allen wrench was needed for blade removal. After everything was apart, I did not see any thermal compound on either side of the TEG module. The addition of a thermal conducting grease is necessary for proper heat transfer to the bottom of the module - hot side, and also the top to efficiently dissipate the heat from the top side of the TEG module. After a good 91% alcohol cleaning, I applied the thermal grease being careful to only use a tiny amount, spread over the modules top and bottom surface - YOU DO NOT NEED MUCH. Making sure to reassemble with correct module orientation, (mark the side where the red wire is before taking apart), gently tighten the screws holding the "sandwich" with alternate tightening to provide even mating pressure. Also make sure to center the module between the screws as the top and bottom plates CANNOT be shorted if they may be in contact with a screw. The screws need to be just really snug and not overly tight to keep from deforming the nylon screw insulators. If any of the thermal grease oozes out at the edge of the TEG module, clean excess with a Q-tip. The blade alignment should be checked again as the blades may not be as straight as before the addition of the thermal grease mod as blade removal/installation may have resulted in a different fan screw "bite". I have seen TOO MANY YT videos about adding a stove fan to their Buddy heater, without mounting on a SEPARATE - BOTTOM plate. The proper operation of the self regulating bi-metal thermostat strip on the bottom on all of these fans need to have a surface in which to lift from. SEE PIX. Just hanging ANY fan over the front of any heater will subject the fan bottom "foot" to OVER 750-900 degrees F. The pictures show a GOOD method to PROPERLY use this or other fan on a Buddy type heater. In my final testing, using an IR temp gun, the bottom/underside surface of the aluminum plate, (1/8 inch thick), measured 750-800 degrees F, with the top of the fan foot plate measuring around 350 degrees F or so which is what these type fans are suitable for. This measured 350 degrees F did indicate the bi-metal strip was operating as intended with lifting the fan foot upward ever so slightly to keep the heat applied to the fan foot at the nominal 350 degrees F. All the hardware used were stainless screws/nuts with "double nutting" all shown screws. The fan is very stable with only using two screws at the rear of the fan's bottom foot, with both being a bit loose, (DOUBLE NUTTED TO HOLD THE GAP TIGHT), to let the front of the fan foot lift upward slightly as the bi-metal thermostat strip does its job. The two screws that slide into the heaters open slotted holes at the rear, are again, double nutted to hold a small gap to enable easy insertion into the slots. The heaters grill slots need to have a bit of a larger space to enable the screw heads to be inserted into the slots, (SEE PIX). After the rear screws are inserted into the slots, slide the entire aluminum plate a bit forward and the two DOUBLE NUTTED screws that are holding the fan's rear plate, sit down just in front of the heater's wire grill rod, not letting the plate assembly slide rearward.... A bit wordy, but the pictures tell it all....

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It works well but I didn't feel like it put out as well as I was expecting. We had one last year but it stopped working. You have to make sure it's not too hot. Great during no power and it's nice to know it will circulate the air when you don't have anything. Always nice to be prepared and have something on hand

The fan is very noisy and rattles. Like it is unbalanced. I would not purchase again. I initially thought it may need to work the kinks out but after a week it is worse.

I was worried about this little fan being able to move the hot air around, but it has done a great job so far. I have used it on two different heat sources, one propane heater and the other a firebox. Obviously it kicked into gear quicker sitting directly on the wood burning firebox, but even sitting above the propane heater it has done a great job. The only thing I could consider a negative, not the fan's fault, is that it seems to be very delicate. It will take me great care of this item to not destroy its blade balance. Hopefully this will be an item, in a world of more and more disposable products, I can use for a long time before having to replace it!