Refrigerator vent duct fans

austinjenna wrote:

jamnw wrote:

...
I would think for longevity of the fan, cooler air being pulled across the fan would be better than hot air. That's part of why I mounted my fans at the bottom.
Good logic. I wish more design engineers could think like that.

All your electronic devices like computers, tv's, dvr's, xbox etc... all have the fans sucking the hot air out, not blowing air in because it is more efficient that way.

Not to say pulling the hot air out is not more efficient or that the fans are not more efficient placed at the top vs. the bottom.
I don't really know, or have any concrete data to prove one way or the other.

I've yet to see a TV or DVR with a fan. Not to say there is not one. I just haven't seen it yet. And I don't have an Xbox. Our Wii does not have a fan.

I think the reason PC case fans are where they are is for space requirements.

As far as the fans being 90% more efficient: if you're pulling "X" amount of air in, does it not stand to reason that you are pushing that same amount out?

I can feel a pretty good breeze from these fans on the "blowing side" of the blades.

I believe that as long as your are getting airflow up the vent you are doing good.
I believe the fans will last longer pulling cooler outside air.

And I would rather stand on the ground to replace one of the fans than climb unnecessarily on my roof to replace one, possibly causing damage to my roof, or myself if I fall.
K.I.S.S
Keep It Simple Sailor :B

Thanks for all the input. I love discussions like this. I usually end up learning something.