Ecotech Marine MP40w ES operating noise

[cwatkins]

Quieter than the MH fan? I find that hard to believe. I have 2 of them and at full power I swear I can sometimes hear them from the next floor.

Now at 50%, maybe they'd be really quiet...

[Madreefer]

I dont know why mine are the only load ones around. They are aligned properly. My bedroom is about 50ft from my tank and when they kick on in the morning after night mode I can hear them as plain as day. I returned one on warranty and after a while it too became noisy. So all 3 have been noisy and all from the dry side. I wont get rid of them though so I put up with it.