Inline fan question

So i been trying to figure out how to make my inline fan quiter and this is wat i have come up with. I am first using insulated ducting. then i am making a box out of medium density fiber board and am placing the fan inside. I am am then going to cover the inline fan with duct tape and then pour 2 part poly foam inside. Now my question is... do i have to worry about the fan overheating? I just want to double check. Do they even really get hot?

i believe in ur answers someone post somethin hahaha

Check out the "Quiet, Your Neighbors Can Hear You Thread" - similar ideas to what you're proposing were covered in there.

i dont use a box set up, i hang all fans

Call your local heating & A/C contractor and ask for some sound attenuating duct with insulation. 4-5 feet of that absorbs the fan sound and is rated for over 150 F.
Know what size you need and tell him one or two rooms are noisy from the A/C and you just want to replace 5 feet at the end of each run.

You might have to loop it and that will slow down the airflow a bit but it would be quieter. It comes in whatever size you might need.

dont pour two part foam over your fan. using fiberglass insulation, you can just wrap the fan, and then build your foam box around that. pouring foam on a fan body is no bueno.

i use all inline fans myself... i dont think they really get very hot (when they are out in the open)... one of the advantages of the design is they are supposed to be self cooling... so yeah, i would think you could try that ... if you dont think it will hurt the fan...

let us know how it works...

im sure it wouldnt hurt the fan in the short run, but thats like using JB Weld to close a safe....what are you going to do when you need to get in there? fans have problems, and even a small one would make that thing a paper weight.