The LG 10,000 BTU Portable Air Conditioner Model # LP1015WSR has a Self-evaporative system that recycles the condensing water to cool the condenser. If you live in an environment that has low humidity, you might not have to empty the internal water collection tank. However, if your in a high humidity environment, when the internal water collection tank gets full, the LED display will show 'E5' and the air conditioner will turn off until it is emptied and you will need to restart the unit after emptying the tank. The LP1015WSR provides refreshing cool air for spaces up to 300 sq. ft. Our air conditioning units include a 1 year factory warranty to cover any manufacturing defects. If you feel the unit is in need of service, please reach out to a specialist via Twitter @LGUSSupport, Facebook https://www.facebook.com/LGUSA/ or you can give us a call at 800-243-0000 and we will be happy to help. ^CP