I went down the Eco Wave 3 rabbit hole a few years ago and came out lighter in the wallet and heavier in opinions. This thing is wildly expensive. My logic at the time was simple and probably flawed. If it actually did what it claimed to do, heat and air conditioning in one unit running on power instead of propane or diesel, then maybe it was not completely insane.
Here is the good news. The air conditioning works. It works extremely well. During an unholy Phoenix summer when my home unit died and the repair took two long miserable days, this little beast sat next to my bed like a loyal mechanical dog and kept me alive. I am only half joking. It earned its keep right there.
Now for the bad news. I took it on the CDT trip and immediately became grateful for proper sleeping bags and real gear. The heater was a disaster. Random at best. It felt less like a dependable system and more like a suggestion. Enough so that I would never take it out again, let alone trust it to live up to the hype when it actually mattered.
I have camped in ninety degree humidity and arid Texas wasteland and discovered that a simple USB powered fan provides enough breeze to survive, provided you also drink water like a camel with anxiety. Because of that, air conditioning is not a priority for me.
Cold is another story. I have camped in ten degree snow in the Sierras, and while my negative twenty sleeping bag and three layers of clothing kept me alive, a heater would have been very welcome. Survival is one thing. Comfort is another.
Good luck on your search. Choose wisely.