I have two eheim Pro filters (2026 & 2128) that are side by side out in the open. Both are almost 4 years old and I'm amazed how quiet these filters are. I recently bought a house and I don't have the fish tanks on their stands, so both filters are out in the open. Right now is night time and there is complete silence in the house and you could only hear a very low humm when you are standing next to them. I cannot compare them to any other filters because I haven't own any other filters except for hang on filters. To me noise level is very important and these filters definitely very quiet.