3 different models these connect to the window but use only single air duct sold as is asking 80 a piece. Hisense (dual hot and cold) AC works perfect heater does not needs new belt Winds loud as ever and does have a drip valve occasionally needs to be drained Hisense 2 only cold, works like a champ and does its job has an evaporator so no need to drain Lg best one of the lot works but kids removed the blades to control the direction and also has some toys behind the grill has an evaporator no need to drain Asking 80 each or all 3 for 200 each window hose is different some might have to be replaced but that’s still a lot cheaper than buying brand new ones.