There is an indicator window with special "moisture meter crystals" that change from blue (when dry) to pink (when wet) to indicate when the unit needs to be "renewed". The unit will adsorb approximately 8-10+ ounces of moisture (depending on humidity levels this should take between 6 - 8 weeks). Once the moisture has been adsorbed it cannot leak or spill. This unit uses a specialized engineered crystallized silica gel that is odorless, non-toxic and completely safe.
When the indicator crystals turn Pink it is time to "re-new" the unit. Simply remove the unit from where it is adsorbing moisture and plug it into a power outlet or power strip in a well ventilated area (bathroom with extraction fan, garage, outside, etc.). There is a built-in heater that will warm the crystals allowing them to expand and release the moisture as water vapor into the outside air. It takes about 12-14 hours to completely re-new the unit. When it is completely renewed the indicator crystals will change back to blue. The unit is brand new again and ready to adsorb approx. 10 ounces of moisture.
The crystals will remain active for 10 years and we offer a 5 year limited manufacturers warranty on all EDV500 units. NO LONGER AVAILABLE