This thing is a fan-powered air mixer that fits into a standard round air conditioner outlet.These outlets use an adjustable cone to blow cold air along the ceiling, which provides a even temperature distribution in the room.During winter however, while the aircon operates in reverse cycle for heating, this outlet arrangement only provides a hot ceiling.The obvious solution is to remove the adjustable cone, which allows a column of warm air to exit the outlet, hit the floor and distribute across the floor. Thus achieving yet again an even room temperature.This approach has two drawbacks - one is the noticeable column of air and the other is the somewhat industrial look of the outlet.This fan-thing hooks into the outlet and widens the column of air, making it a lot less noticeable. It also makes the outlet look more interesting. The shown color scheme is for the kid's room. :-)Required vitamins:Print the mounting bracket, the hub and 4 blades. The blades are best printed in pairs. All parts print without support.I recommend painting / dipping the blades and the mounting bracket in acetone, to increase strength. They also go shiny.Insert the bearing into the hub and clip the bracket into the bearing from the other side. Press the blades into the hub, with the thicker end pointing into the airflow.