I just purchased a B and D Portable ac and on page 20 of the Manuel about cleaning the filters I noticed that on this unit I have to clean 3 filters instead of just one!! On my last unit all i had to do is open the back up pull it out and clean it. Why you have to have 3 is beyond me. The problem is the condenser filter is in 2 pieces and closed up with screws, again very BAD design. How do you clean those on the illustration it shows just sliding them out problem is again there are screws in there do you take the screws out or not. The Manuel is very vague on this I am very tempted to return this unit because I find the design not user friendly at all!!!!  If you look at the 2nd picture you see the handle where you are supposed to pull out the condenser filter well right above it is 2 screws. Again not user friendly and very misleading. You have to be a mechanic to figure this out!!!!