What are some filters in your home?
What's the purpose of each filter?
I have two air-conditioner/furnace filters to clean the air as it circulates when I run either the air conditioner in summer or the furnace in winter.
I have a big whole-house water filter in the garage where the water supply enters the house. In addition there is a filter in the refrigerator, which filters the water that either goes into the ice maker or goes through the drinking water spout.
What filters are in your house?