The Vents FB K2 Series, equipped with advanced filtration technology, is meticulously crafted for seamless integration into both supply and exhaust ventilation systems. It excels at delivering a combination of exceptional air purification, minimal noise emission, and a compact footprint.The G4 Series offers single MERV8 filtration designed to effectively cleanse incoming air. This single-filter system can handle airflow rates of up to 341 CFM, all housed in a robust, insulated metal casing. Its IPX4 rating ensures not only efficient operation but also a remarkably quiet performance once your choice of fan has been installed. Fan not included. Need larger quantities?We work with contractors, developers, and builders across North America. Call us toll-free or email our sales team - we’ll get you great pricing for your project. Features: 4"- 8" Duct sizes One MERV8 Filer included Filter Cleaning efficiency - 98% All Metal housing for extra durability Airflow capacity up to 341 CFM - fan not included. High static pressure applications Commercial/Residential Energy efficient and Maintenance free 2 Year Warranty