Bought a used range hood that had no filters.Found the part number AP2837138 but how many do I need?
Does not look like anyone who actually knows the number of filters is going to answer so you could do the following.
Click on the picture of the filter to get a better view.
You should then be able to figure out the filter’s size, each square is 1 by 1 inch.
Then measure the size of the opening and you should be able to figure out how many you need.