This is a great product. I originally purchased it for my small 10x10 office at home, but then decided to move and build a home office externally, so this unit sat for at least 6 months before install. Even still, it installed without any problem. The manual is borderline unusable, broken English. I still have no idea what "healthy" mode does, but it sounds good, so I leave it on. Searching the internet, I think it uses a UV light on the air or something. I also don't know what iFeel mode does.
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The rest is pretty self explanatory or explained in the manual good enough.
I placed my unit just above a window, because I had no other space to put it, so I do have a problem where it measures the temperature way hotter in the morning when the sun comes through, then way cooler in the evening, so I have to adjust it all day. That's my fault, but I plan to see if I can find the temperature thermistor and move it away from the window. It must be on the bottom of the unit.
You seriously can NOT hear this unit running from inside. Being in an out-building, I mounted this on the outside wall which is only about 1/2 inch thick T-11 wood, and with inner walls and insulation, the only thing I hear/feel is the low vibration when the compressor is on, but it's very very low. In fact, this is outside of the wall on my sound studio, and it doesn't affect my recordings. The inside unit is very quiet too, most of the time I don't hear anything.
There are lots of good options like adjustable fins, auto swing on the fins, sleep timer, a quiet mode, etc, so I think for the price, it's a great buy. The cooling ability is perfect. I'm cooling a 16'x10' area with 5 windows with no problem.