Replacing the fan in ReadyNAS Duo - possible?

Ennio wrote:

Javik wrote: This isn't a good way to do it, because the hub (center/motor) of your large fan is blocking nearly all of the vent slots for the 60mm fan. You are just pulling air through the tiny sliver visible around the hub, and the old screw holes. The blades up against the flat sheet metal don't do much of anything. That's not true at all. The fan pulls out air from any hole it finds to pull from. I have thoroughly tested its capacity to ventilate and have a free flow of air from the inside of the box, and saw no problem remotely signifying what you describe. You also miss the fact that I used sillicone-kit to make the fan not pull air from other holes than the ones linked to the insides of the unit and adapt the size of air-flow. Of course you can pay up heavily to get pre-packaged plastics (like the ones you try to sell) that do the exact same thing, but I don't need them, obviously.

Heh I'm not selling anything. Those links were the from first site I found with Google with both funnel sizes. Also, I hardly think it is expensive to buy funnel adapters that cost a total of $5 for both to help prevent meltdown of a $250 NAS device outfitted with two $125 drives. Um, I think I can afford the extra $5 to assure high CFM with a large slow fan and avoid drive/NAS failure.

Ennio wrote:
Furthermore, the HD temperatures I get are waaaaay lower than those from using the stock Crown fan that came with my RN Duo. Not to mention the noisefree operation I have with this fan. Plus, I can set it to run at 1100 RPM and still my HD's stay under 29 degrees Celsius. Conclusion: Using a large fan, the way I did, is not going to be a problem whatsoever.

It is a classic case of YMMV. What is your average room temperature? Do you have air conditioning? What time of the year is it? The manufacturer's CFM rating is going to be designed to operate across the widest range of temperatures, including very hot places where that whiny little fan has to run at max speed just to keep up. Also, dust is a factor, such that you may be getting a great temp reading now but just wait until the thing gets dusty after 6-12 months.

I'm going to be sticking this into an un-air-conditioned upstairs closet that regularly hits 80-90F in the summer, so I need to match the stock CFM or better because it will not be in an ideal cooling space,