The air filter- It's just an electronic version of putting a box of baking soda in the fridge. See the video I posted in the comment you are replying to, its from the manufacturer and shows the setup.
The water filter- My fridge makes ice and dispenses cold water from one of the doors. This mechanism has a water filter.
The water filter- My fridge makes ice and dispenses cold water from one of the doors. This mechanism has a water filter.