Sadly, I’ve found that a great many companies—especially small or highly specialized software firms—pay little attention to mechanics of good user interface style. “As long as it works, that’s what matters!” seems to be their mantra, with little regard for inconvenience that this imposes on user.

Thankfully, that’s not how we operate at our company. Our team of developers invests considerable effort into making out user interfaces as intuitive and foolproof as possible, since we know that this is something our customers would appreciate. I’ve often commended my teammates for recognizing that excellence is worth pursuing.

In any air conditioning unit, there must be a process for absorbing heat from indoors and discharging it to outdoors. For air-cooled units, heat is discharged directly to atmosphere.

What's difference then between window units and split units?

In window units, whole refrigeration circuit is installed in a box-like enclosure. The cold portion is separated from hot portion by partitions. As name suggests, usually it is installed at a window, mainly because this is easiest place to make an opening in wall. Failure to find a window opening may mean hacking wall to create an opening roughly same size as window air cond unit.