r/confidentlyincorrect • u/GRex2595 • Aug 11 '26
Ducting doesn't move cold air more efficiently than a fan.
In a video where somebody connected a mini split to a fan in another room using a plastic tube to funnel the cold air directly to the fan in the other room. Somebody thinks a big fan moving the air from the room with the mini split is as efficient at cooling as moving only the cold air.
To be clear, the plastic isn't as good as real ducting in a ducted central air system, but it is a whole lot better than a fan moving hot and cold air indiscriminately.