How to isolate a refrigerator?

Hevac,
Thanks a lot, very helpful. Im actually having a HVAC guy coming over to look at it. Will see what options are available.

Moving the A/C unit could solve the problem but the longer the lines the less efficient the A/C is. But a small trade off for the solution you seek. If you do have it mived have a extra thick concrete platform poured. That will help in vibration. One thing to answer your question is, yes the a/c unit needs to be level, and isolating the tranfer lines from the wall pass thru will help too.

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Ebm,
R u serious?

The distance between A/C units in a split system will not affect the efficiency of the unit unless the length is over 100 feet. Copper line sizes are compensated for distance. Split A/C systems are designed and factory charged for up to 50' of copper lines between units. When the copper line sizes are increased for a run over a 50' Freon would need to be added. If the line size was not increased for a distance over 50' then efficiency would suffer.

Ductless splits are the exception, 35 feet max, anything over that distance would affect efficiency.