This is most efficient because it does not allow the air in the room to stratify. My neighbors have been really polluting my air so with propane had to have ventilation and loss efficiency.

The condensation pan has a drain feature for very humid climates. It keeps the temperature where i set it.

This is a a+++ ccu unit i call it. Easy to install. Only gripe is with heat, the fan turns off when it's cycled off. The instructions tell you to remove all 4 screws from the sides and back of this unit, then separate the otter frame.

Customer support is the worst we have ever experienced. The seller takes a long time to respond if they respond at all. The warranty is only for 1 year.

The offtemp a/c is still cranking, kindof, but still increasingly off temp. It ends up freezing up. The heat comes from a very wasteful resistive heating element.

It is extremely loud and noisy. Rattles badly and compressor only cools for about 5mins before blowing hot air. The actual plastic vent parts rattle.