Dying here in Perth working from home, and the recently re-located home office doesn't quite get good airflow from the house's installed split systems in the main house areas (old house)… gets really really hot when I close the door in school holidays on serious phone calls, which is most of the day.
Have a big 52" ceiling fan in place, but not cutting it with long days in there.
Was thinking of getting a portable evaporative unit, as the climate is dry and I have two outside windows either side that will allow airflow.
That said, looking for deals and previous bargain search requests there was great negativity / warnings against portables.
1) Evaporative don't work so well and is noisy
2) reverse cycle portables release their heat in the room, even with the exhaust pipe and is not efficient.
It is a 35 to 40 degree week here in Perth. Room is just under 20m^2