damn. i bought all hitachi coz i heard btu is high.

Does test mean just use the "Normal mode"
Or the "Powerful Mode" on your Hitachi?
There is a noticeable difference in these 2 modes.

I tried the "Powerful Mode", the 2nd,green, button and it does cools down the room quickly,by feeling, not by exact temperature measurement.

Honestly, I dont even bother to "benchmark" the time it takes to cool down the room. I just trust the BTU cooling rating. Higher is always better.

Hitachi aircond is belong to professional series , you must choose either wide flow or low btu and high btu model also available , pls check before you buy next time dont just complain for blindly , Hitachi definitely as good as mitsubishi , and this 2 brand definitely professional's choice! I bought the Inverter series for my parents , till now kicking and rocking , better than carrier , york and so on , if looking for just cold purpose , extremely cold purpose then york , and other cheap choice will do , but when comes to health concerned , hitachi and mitsubishi is something you should pick

Have a nice day you definitely wont regret for what you have purchased for long term
because you will be saving quite alot on electricity bill , if you having york , u will be paying sky high electricity till you kantoi!