Zero Breeze. Scroll Compressor with R134A (not a swamp cooler) AC with a 24v, 3-5 hour battery - no power from the car needed.
16.5lbs.

I've been thinking about mounting it in the front trunk mount, condensation drain pipe and heat outlet under the car, and plumb into the dash vent tubes?

https://www.zerobreeze.com/products/zero-br...rand_Product_ph

This was a startup company I've been watching for a couple of years now that looks like it's finally made it work.

What do you think?

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The 2300 BTU rating seems a bit low to cool down the car on a really hot day, but it is not a bad idea. You can buy a 10 amp 12vdc to 24vdc converter off Amazon so you are not at the mercy of having the battery die just as you get stuck in a traffic jam in 100 degree heat.

Of the other A/C projects, what's the average BTU to cool a 91?