[pure-silver] floor vibration?

I have a question about the new darkroom that I'm building in a garage in my back yard.
My old darkroom was a box inside a garage. The floor was a concrete slab.
In the new darkroom, we had a wooden floor built on top of the slab, because the slab was so uneven. The walls are now tied in with the floor, and there is a vent hood mounted on one wall, with a fan on a shelf next to the hood to pull air through the vent hood. In the old darkroom, the vibration from the fan vibrated the wall, but not the enlarger, because the enlarger sat on a table on the concrete slab.
Today I suddenly got worried that the vibration from the vent fan on the vent hood over the sink would vibrate the floor, because now the floor is tied in with the wall. Then if the floor vibrates, the table that the enlarger sits on might vibrate also. 

So, what should I do to prevent this from happening?

--shannon

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