Many non-brand name portable air conditioners have a lower amperage rating but a higher BTU rating. This doesn't make sense, how could a non-brand name portable air conditioner output 50% more cooling power and use almost the same amount of power as a brand name model?
For example, a LG Model # LP0817WSR portable air conditioner has a BTU rating of 8,000 and pulls 9.2 amps. A Whynter Model # ARC-12S portable air conditioner has a BTU rating of 12,000 and pulls only 9.5 amps.
Is it common for manufacturers to overstate BTUs? Is going by amperage better than going by BTUs?
I currently have the LG model stated above and can get the bedroom down to about 68 F when the central air is set to 78 F on a 100 F day. Would the 12,000 be able to take it down to 61 F? The room is only 140 square feet and has 3 older windows.