Here's a post regarding how dirty an "air conditioner" filter gets: S2000 used A/C filter post with pictures
On cars without them, it either collects on the A/C evaporator, the inside of the vents, or gets pushed out into the cabin.
Now changing this filter makes a big difference in airflow... after changing it you can usually get adequate airflow at a lower blower setting.
Thank goodness on newer cars it's as easy to change as an engine air filter. On the first models, you typically had to tear apart the dash to get to it!
On cars without them, it either collects on the A/C evaporator, the inside of the vents, or gets pushed out into the cabin.
Now changing this filter makes a big difference in airflow... after changing it you can usually get adequate airflow at a lower blower setting.
Thank goodness on newer cars it's as easy to change as an engine air filter. On the first models, you typically had to tear apart the dash to get to it!