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The issues here are thermal induction and temperature gradient.
Water has a higher rate of thermal inductance than air. Water will quickly absorb and/or release heat. That's why a 72 degree day feels great, but a 72 degree shower feels "ice cold".
Also, the temperature gradient (range of, or difference in, temperature) plays a key role. The closer together the temperatures are, the less heat transfer occurs.
Blowing 90 degree air across a thin 50 degree line at high speed won't cause a lot of heat exchange (think cai). Blowing 150 degree air through a heat exchanger with 50 degree water (think intercooler) is exponentially more effective.
This intake is a scam, pure and simple.