Summer 2019, can anyone recommend a good portable Aircon

[disneyspendingmoney]

The main window is 2.5m long by 2m high and faces west, from about 1pm in the summer the room becomes a furnace and it's only got a 1m² opening window. The room is 15m² floor area, probably 30m³

So can any one recommend a good portable aircon.

Oh yes, it's a good time to buy. I bought this last February when it was snowing and it was brilliant over summer.