My last purchase is a split system. For a very long time I chose which split system I should choose, I needed to calculate the power of the split system, for this I had to calculate on what area this split system would work. Then I found this article
https://coolingfanreview.com/tower-ac-vs-split-ac/ on the Internet, there is a description of different models and their comparison. I really liked one system that really works well. This was my last purchase.