Bests & Worsts Reviews from Amazon

Doesn't cool my room at all. After leaving it on for 2 hours, my room feels hotter than it started. It's blowing very cold air, and pushing out hot air, so I know it's working. There's also no leaks of the hot air. After researching, I found out the problem. Turns out portable ACs have this issue where sucking all the indoor air and pushing it outside creates a vacuum. This vacuum forces outside air to come inside the house through small cracks. So you're effectively opening a window while turning on AC. A proper AC should take outside air to blow heat off the coolant. This avoids a vacuum. Also, wonder why there's 2 BTU ratings? the larger one is on paper, the smaller one is the actual rating, accounting for outside heat drawn from the vacuum (although for me, it completely cancels out the cold air). Buy a window AC, it doesn't have this problem. They're also way more energy efficient, so smaller energy bill. Also easier to return than this huge thing. It's well known that portable ACs have this issue. Only reason companies make it is it looks better than window mounted ACs. update: I just bought a frigidaire 500btu window ac, and it actually works. It's way quieter and less expensive. Since it's such a hassle to return this now, I'll think of something to make it useable (maybe 3d print a mod to make it dual-duct, which would solve the issue and also transform it into its true rating, 12000 btu)