Quote:
Originally Posted by Piwoslaw
I've read that centrifugal or crossflow fans are most efficient for household ventilation. Also, they should be DC powered: - AC powered fans "hum" at the grid's frequency and may cause the whole installation to vibrate,
- AC fans can cause electromechanical interference,
- DC can be easily tied into an RE or back-up power installation.
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Yes, quite right.
At this point, since my application is so undemanding, I'm considering a pair of 3 inch fans.
But I'm also looking into cross flow fans (AKA: tangential flow).
I also investigated Pulse Width Modulated fans...
...but the energy used by the above fans is so small that energy savings would be very small.
Regards,
-AC_Hacker