Couple of comments...

I use a couple of similar things to keep the humidity up in the house, usually you can set the humidity level on them. However, I have had them leak water all over at times ruined the parket flooring in our condo we think (well we rent ).

So be very careful with it, and make sure the cabinet is levelled.

Also, the only other concern I would have is that unlike large walk-ins there isn't alot of airspace for it to blow up into, my concern would be that condensation might form on the tray or whatever above it with these kind of units.

Just my 2cents. Hope it is helpful, and awesome looking cabinet.. I saw one of those when browsing around, would love to own one myself

-W.