Sir ghost, National was a brand by Panasonic. I don't think they use the National name anymore. They've rebadged all their products back to "Panasonic".
renz, Condura is the lower end line of Carrier. I think your main concern should be compressor warranty (how long) and decibel level. I don't know if it's just me
but I find Carrier/Conduras a bit more noisy than the Panasonics. But they do have that a/c to fan plug.
We have both brands in our house. Although they don't have the latest in electricity saving technologies in their window type lineup, at least you can be sure they will last you a loooong time. We also have inverter type refrigerators and split type a/c's and as far as I can tell, they really do save you a lot of money.
You might want to consider getting an inverter unit.
