only the fan specs
Mfgr Model A RPM static CFM noise, dB(A)
Papst 4412 FGL 0.105 1600 55.3 26
Delta WFB1212L 0.14 1750 0.104 61.8 30.2
Delta WFB1212M 0.33 2100 0.134 72.4 34
Delta WFB1212H 0.45 2470 0.189 86.5 37.6
Delta
Delta AFB1212VHE 0.9 3200 0.420 130 48
Delta AFB1212SHE 1.6 3700 0.571 151.8 53
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