A:AnswerYes. You can disassemble the lower filter with a screwdriver. Insert the filter into the 4 slots toward the bottom direction at the back side and toward the front direction at the side, make sure filter aligned well, and then tighten with screw.
A:AnswerIt comes with a manufacturers warranty. Since it's a best buy product it was easy to file a claim. When mine broke I took it back to the store and they replaced it.
A:AnswerIt looks like you just run it in fan mode to dry out the interior of the unit
after you empty the drain tray. I guess it is to keep any interior metal parts
from rusting from any water sitting in the unit over time.