Hey,
thanks for writing long reply to share ur opinion with me 😀
My room is a close up area and with proper door sealing.
1) ability to remove odor in the room
Regarding to this, I do have air purifier with charcoal filter in my room but don't think it really effective in ordor removal. Plus charcoal will get saturated after a while.
Actually remove ordor just one of the plus point for me to get rid of the air purifier. (Not throwing it away. Just moving it to another room 😛)
The main point is the concept of fresh air can bring in filtered air rich in oxygen into the room and reduce co2 level in the room. Borrowed an air monitor meter from a friend and test in a closed room. The Co2 level indeed quite high after hours. High concentration of co2 in a closed area can lead to health issue 🙂
2) maintain the humidity level of the room (because suck moisture fresh air outside the room)
I do have humidifier as well. Just thinking if having this type of aircon, maybe I can get rid of the humidifier.
3) power consumption of the aircon (since this aircon suck and exhaust air, will it consume more power to maintain cool air)?
In normal circumstances, yes this type of aircon will surely consume more power.
Based TCL fresh air aircon website, it should have some Heat Exchange concept on the aircon.
This heat exchange technology is quite common on Fresh Air system. It transfers heat from outgoing air to incoming fresh air, pre-cooling or pre-heating it, which can save energy and improve indoor air quality.
Anyhow, this heat exchange is just a ads on TCL website, not really sure how effective is it in saving energy.
That's why I hope someone with this aircon can share with me 😉
Hope to know more on the installation part too.

So, your room is really sealed tightly and you spend long hours in the room without opening the doors/windows. I do really think the new "fresh air" feature would really suit you
As for the charcoal filter in the aircond (if any) you would still need to replace it. Honestly, I doubt it will be as big and effective as a dedicated one in a purifier. Which purifier are you using btw?