I have a Haier unit, but different model. It reads in the manual that you might hear gurgling sounds, which is refrigerant through the pipes. This would mean it is a compressor. Fortunately Haier is one of the companies who make a plate-cooling unit instead of a fan-assisted evaperator. This will cool without removing humidity very much. Mine is larger and uses that plate-cooling. It has been running for over a month now, and is fantastic ! I really doubt that being as big as that unit is, it would be thermoelectric. I bet the guy is having a hard time identifying what kind of unit it is because the plate takes up the whole back wall of the unit inside and has no fan.
I would take a serious look at that unit because if you are in need of cooling, these units work really well.
Hopefully this helps a bit.