I have two Bosch D+ D3410 filters. One has a date code of F04H12F1 and has louver holes on the center tube, the other has a date code of F06G18F1 and has circular holes on the center tube.
I don't think I really care about the actual dates because these are both fairly new, but I was just wondering when they switched designs for the holes in the center tube? Does it really matter louver vs. round?
I don't think I really care about the actual dates because these are both fairly new, but I was just wondering when they switched designs for the holes in the center tube? Does it really matter louver vs. round?