Study room, use averagely 2-3 hours a night. 1HP Inverter or non inverter better?

This post has been edited by echoesian: Jul 9 2017, 12:45 AM

Which is more accurate for the BTU calculator? Panasonic of Daikin website?

1) http://airconditioner.my.panasonic.com/hor...wer-calculator/

OR

2) http://www.daikin.com.my/heat-calculator/

What is the break even point/durations of using an inverter air conditioner to repay back using the TNB bill savings for the initial high cost of buying an inverter compare to use a non inverter air conditioner?

In other words, what is the ROI of an inverter air conditioner purchase?

This post has been edited by echoesian: Aug 13 2017, 08:40 PM

The reason I ask because some of my rooms only use max 5 hours per week, not sure it is valuable to buy an inverter compared to non inverter.

I thought the more the a/c being used, then the faster is the ROI?

Not sure why Panasonic 2HP tends to be cheaper than Daikin