Where is the location of the in-cabin air filter? on 2001 Mazda B3000

Low air flow from heater/air conditioner.

Asked by for the 2001 Mazda B3000
There is no factory-installed cabin air filter for the vehicle you specified.
thanks for the quick reply
2 answers 2 comments
ck for fan or a/c vent hose blockage
thanks for the quick reply