Hello,

I hope it does not too ridiculous to ask this here but I just hope it's a good place.
I want to buy an AC for my apartment and install it in the lobby to cover a max of 450 square feet area(40 sq. meters), representing few rooms.

Which BTU is recommended for this area? My calculations show aprox. 20000 BTU(I took into account 2 persons and 2 computers). I only need the AC for cooling during summer.

I have no idea which brand to choose, there're so many.
I was thinking about choosing between Daikin and Hitachi but not sure which, each have different range of products.

Can you give me few suggestions please?

For example, I was thinking about choosing one from these 20,000BTU cooling models:

FTXN60K
FTX60GV
FTXS60G

These 3 are shown as being part of Oki, Comfort and Professional ranges.

There's also a 24,000BTU one which got my attention: FTX71GV

I have no experience with AC, I read for example that beside the brand it's also very important how the AC is installed by the company doing the AC installations.

Any advice would be great!

Thank you