I used mine for awhile to see what would happen and save money. It made up about 20% of the water used. At first it was ok. I kept a check on the ppm's which stayed at 0 ppm's. Then about 3 or 4 months down the line we started getting the slime snot on the root. Did everything we could for root rot. No go. Then we found Physan20 and cleaned up a bad cyano-bacteria mess. Only place I can imagine it came from is like headshake said from the pathogens from not being boiled.

If I had to do it again and needed to save I would boil the water first. I would drink it after it's boiled. By the time you spend the money to boil it I just went ahead and got a good R/O filter.

After you run your dehumidifier for months look at the tank or run off. Kind of slimey. Keep it clean so it doesn't jump to your rez. LOL.