So my old fan from the 80's died completely, not because the mechanics failed, but because I tinkered with it a lot. Anyway, finally ordered again because it looks like the old fan I had with an aluminum fan. The shaft on this unit is much longer but I didn't have to cut the shaft, I just lowered the aluminum fan because it had a screw that would allow me to lower it onto the fan shaft. After a few more fumbles, he finally made money at $30 an engine. The plastic fan just isn't comfortable to use as it's a regular fan that probably costs 10 cents. Hopefully the quality will last as long as the 1980's exhaust fan I had. The label on the old fan says "BREVEL PRODUCTS". although I can't find anything online. This fan needs to be properly calibrated to keep it from vibrating in the fume hood. I added some rubber washers around the strut to avoid too much vibration. Still noisy but bearable. I also added some foam around the lid to dampen the vibration. Looks clumsy, but works. I expected everything to work out. Installed, fits well. The fan was plastic and didn't blow like in this review, but it was only there for a few minutes because it was really noisy like a helicopter. Didn't pick it up because it was unbearably loud. I gave the seller 3 stars as a sign of respect because I didn't want them to lose their business. I take care of my mother and the pop business. I'm sure this works great for others, but not for my application. I had to go back. The reason for the return was that same day delivery was promised but it arrived two days later which I think was Revain's responsibility. Very bad. because I was looking forward to it. If it came the same day I might have had time to get it working, but it was very noisy. I could have added a few more muting mechanisms but the client said to just bring the old one back.
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