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Discussion Starter · #1 ·
Hey all,

I've got a newly finished room in my basement with full-height cement walls on one side. Through that wall is dirt. Sitting on top of that dirt - level with the ceiling of the basement - are 2 AC units. They are each sitting on their own concrete pads which are not connected to the house.

When running - they must shake the ground, where the sound travels throught he dirt, into the concrete wall - and generally into this room. It's just a buzz - but enough to be annoying.

I want to cut down on that sound. Can I lift them up and stick rubber feet or something under them?
 

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Could be the line set that is transferring the noise.
 

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Hvac Pro
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Those pads absorb a lot of the vibration.
 

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HVAC Supermodel
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Don't use the cork type pads outdoors, they will disintegrate. Use the all rubber or rubber/foam combo. I'm with beenthere on the lineset thing, pads should always go under outdoor units anyway
 

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Years ago GE used to put them in the box with the condensing units. Hard rubber like hockey pucks.
 

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Discussion Starter · #7 ·
I wonder if those rubber interlocking kids play mats would work - we had furniture on them for a year, and the feet compressed them but not completely. Don't know what would happen though if they are exposed to weather.

I understand the acoustical properties of the first reply's solution.

Anyone know of a simpler, cheaper solution like what I suggested?
 

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It doesn't get any easier then sticking some rubber anti-vibration pads under the unit. Cheaper? Well I suppose you could pick up a junk tire and cut squares instead of buying the pads.
 

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May cost more for the hacksaw blades to cut thru the steel belts of the tire than the pads.:yes:
 
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