To be honest, people who say it limits airflow have to take it on their heads. No wonder an arrow shows the direction of airflow. This is my second time buying these filters. I think they do a good job BUT I don't think they can last a full year. I change mine about every six months. I also think the time depends on where you live and the condition of your environment (smoking, pets, etc.). The only negative is the steep price for each.
Filter under the sink Aquaphor Favorit ECO silver
20 Review
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review
🔧 NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
18 Review