Qi is a Human Construct Says Feng Shui Expert

Qi is a Human Construct. It’s also an assumption. That is to say, it’s just made up. Of course, we always knew that. But now we’ve had it confirmed by Howard Choy, a Feng Shui practitioner, and practising Feng Shui Architect.

"There are quantifiable qi like tianqi (weather) and qixi (breath), etc. The there are also unquantifiable qi like gua qi which is a human construct but we still use them because it is a useful tool by experience, like art, philosophy and religion."

from Skeptico.

This strikes me as one of those philosophies that has tried to expand into the external universe something that is entirely within the human body or experience - see the Body Electric by Becker. What really needs some investigation is the chakra system, which is also within the Taoist system.