Selecting the right G1-G4 primary filter is the most cost-effective decision you can make for your ventilation system. Often called “pre-filters,” these components are the first line of defense, intercepting over 90% of large particles (>5μm) such as lint, sand, and heavy dust. As a source factory with 20+ years of experience, we offer various media types, including our popular AZ-series synthetic cotton and G4 pleated panel filters.
When choosing a primary filter, focus on Initial Resistance and Dust-Holding Capacity (DHC). A high-quality G4 filter should maintain low pressure drop even as it accumulates dust. For industrial environments, we recommend our Reinforced Pleated G4 Filters, which utilize a moisture-resistant beverage board or aluminum frame. This structural integrity prevents the media from collapsing under high airflow. By strategically installing a G4 pre-filter, you aren’t just cleaning the air; you are shielding your expensive downstream F5 ceiling filters or H13 HEPA filters from premature clogging, potentially saving thousands of dollars in annual replacement costs.
