I use a dehumidifier and am quite happy with it, bought it at home depot and it gives me about 1 container each day.  
 
I started with reusing the water, and I can tell you from experience it does not harm any of my fish.  I only added it to a FOWLR tank.  BUT, I also had consistent Cynobacteria until I stopped using the water.  Never did test the water but I assume high phosphates and iron ?? 
 
I expected more and when I brought in a guy to look at the system he said I should be more concerned with circulating air so I leave my HVAC on full time.  
 
My two cents worth.  
 
 
Zulu 
		
	
		
		
		
		
		
	
		
		
	
	
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