4″ Air Duct Screen + Carbon Filter – MERV 4 Odor/Dust Reduction

Upgrade your air quality with this USA-made 4-inch air duct screen and carbon filter—designed for grow tents, HVAC vents, or fresh air intakes. The dual-layer system combines a durable fiber screen to block debris and a carbon filter layer rated MERV 4 for light particle filtration and odor reduction. The rigid ASA polymer frame ensures weather resistance, while the precise 3.95-inch outer diameter and 4.21-inch faceplate fit snugly into standard 4-inch ducts without restricting airflow.

Ideal for pre-filtration in light-duty applications, this filter prevents small objects from entering your ductwork while helping to reduce dust and mild odors. The high-flow design maintains efficient airflow, making it a practical solution for maintaining clean air in grow spaces, attics, or ventilation systems. Built to last and manufactured in the USA, this filter delivers reliable performance for everyday air quality needs.