Quote:
Originally Posted by Pug
Just to add...
My dehumidifier had aluminium vanes on the evaporator but the pipes were copper.
I ended up removing all the vanes (as they are designed for channeling air anyway, not fluid) leaving just the copper element to be submerged. 
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Be careful, generally when the copper piping is extruded through the aluminum fins a layer of aluminum is left on the copper piping. On my evaporator coil all the pipes are covered with an aluminum layer. It's not hard to tell the two metals apart

so just make sure that you're using only copper.