Split Type Aircon: Which is best?

[vinj]

Office ko has 1 2.5 unit for an open space 57sq meter office with 8 persons., kaya naman. Pero ngayon summer, thinking of adding 1 more 1.5 unit para mas malamig.

Try to review also the cooling efficiency of your office (i.e. A/C unit locations, windows, insulation, etc.)