This is my fridge air filter - https://youtu.be/ziaCjNIPSCU all the new fridges have them now. It's literally just for filtering the air in the fridge, the high tech version of a box of baking soda. My HVAC system is steam radiators, which, thankfully, don't require filters.
I don't doubt that filters should be changed regularly but I don't trust LG to tell me when.
I don't doubt that filters should be changed regularly but I don't trust LG to tell me when.