Why make a filter and call it 4 when its not 4! Your filter doesnt fit tight in the furnace air duct and leaks un-filtered air into my motor and air ducts!!
This may be equivalent, but wish is smaller by almost an inch. Not sure how will perform. Will not buy again The previous filter I used had a good tight fit.
Just like it sounds thinner than the item I am replacing yet the dimensions were the same as the OEM. Thank god I not on some sort of auto refill. Well not buy hear again. Dissatisfied and disappointed. Mean D minus grade from this customer. Where is this product produced?