Our apartment in Bangalore has 80 flats with STP made in the basement. The noise and vibration are unbearable for some of the ground floor flats even after putting anti vibration mounts under blower. The vibration is so high that it can easily felt on many walls and columns of the building. Our maintenance guys tell us that nothing can be done as the sound is coming because the system is placed in basement resulting in echo. However they don't have any specific answer for vibration. Kindly suggest a suitable solution to get rid of the issue.