I use it run a hose right into my sump never have to top off my central system I added carbon and a some (RO/DI)absorbing resins to the collection jug and added my hose a few inches from the bottom.
BTW anyone who thinks the water from the dehumidifier is nasty go look in your toilet tank do you think the miles of pipe leading to you house look any less goopy.Plus there are no phosphates,amonia,iron,heavy metals,arsnic,blah blah blah in the humidifier water IMHO