Vibration insulators
Refrigerators, pumps, fans, cooling towers, pipes, pipes, rigid electrical ducts, etc. that are rigidly screwed into a structure, transmit 100% of its vibrational energy. The introduction of vibration insulators, selected appropriately will reduce this transmitted energy to the extreme that is totally imperceptible or so reduced that it is not annoying to the occupants, or structurally destructive or at worst.
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