Reread Posts #4, 18 and 23...
Please see post #4, 18, 23 on this thread.
I reread the above posts and thought my post answered some of the questions/problems that were reported.
Post #4: "Vents under the front seat are for heating purpose only".
When I read this statement I went ahead and checked my CX-5 Touring to see if it fit into this non-cooling, heating only, category. It didn't, as I found A/C cooling air being supplied from the vent.
Post #18: "The floor vents are simply not effective for cooling".
If you note, I made the observation, ie: "When the seat(s) are forward, more A/C air flow is available for the rear passengers. I can understand how lack of A/C for the back passengers could be a problem if the front driver/passenger had long legs, thus restricting said cool air flow... and then I went ahead in further comments on how one might remedy this.
Post #23: "I certainly don't want to waste the cold air going out of these low-positioned vents which are designed for heating purpose and make the weaker cold air coming out of the front dash AC vents!"
The above is why I suggested for Mazda to extend the under seat vents as a way solve this problem... or by trying to adapt some type of additional extension to the existing vent outlets allowing the A/C air to exit past the back of the front seats.
I'm still having problems placing my mind around the... "vents which are designed for heating purpose", when I have observed/felt A/C air being discharged from the vents. My question would be then: "if it's for 'heat', then why does it also work on A/C?
CX5T Lover