| HVAC Zone / Stage | ASHRAE Standard | Target Pollutants | DTAF Recommendation |
|---|---|---|---|
| Stage 1: Fresh Air Intake | MERV 8 (G4 / ISO Coarse) | Leaves, Insects, Coarse Dust, Pollen | Pleated Panel Filters / Washable Nylon |
| Stage 2: Main AHU Filtration | MERV 13-14 (F7-F9 / ePM1) | PM2.5, Bacteria, Fine Urban Smog | High-Capacity Pocket Filters / V-Bank |
| Stage 3: Odor & VOC Control | Gas Phase (Carbon) | Exhaust fumes, Food odors, Tobacco | Activated Carbon V-Bank / Panel |

We manufacture 100% custom dimensions (with ±1mm tolerance) and offer extruded aluminum, galvanized steel, or moisture-resistant cardboard frames for total OEM flexibility.

We process massive container orders swiftly. Standard commercial filter bulk orders generally dispatch within 7-10 working days directly from our factory.

Shipping bulky HVAC filters is expensive. Our in-house packaging base custom-designs cartons to maximize container space, significantly reducing your ocean freight costs.
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