High Efficiency 4-Inch Air Filter Box with Replaceable Filter - Perfect for HVAC Systems, Home Ventilation, and Air Purification

• A duct filter box designed for use with inline fans to circulate fresh air and block dust and odours.
• Built with 1mm thick cold-rolled steel and aluminium duct flanges, able to withstand extreme weather.
• Slide lock door gives easy access to inner chamber while soft neoprene layer creates dust-free seal.
• Includes a standard high efficacy filter that traps particles like dust, dirt, lint, and odor.
• 23.46 x 8.42 x 11.73” | Fits 4” Inline Fans | 400 CFM Maximum | Accepts 12 x 20 x 1” Filters

Product Description

A whole-house air filtration system designed for use with inline duct fans such as the CLOUDLINE Series, to circulate fresh air by blocking particles like dust and dirt from entering your home in intake applications. Each air filter box is built using 1mm thick cold-rolled steel and finished with matte black powder coating. This outer body build comes together with aluminum duct flanges to create a sturdy build capable of withstanding inclement weather. Its low-maintenance design features a hinge-sealed door equipped with a slide lock that provides easy access to the inner chamber. The door is lined with a soft neoprene layer that keeps the filter in place, and dust from seeping inside.

Applications

Each air filter box accepts standard MERV filter replacements that slide into the inner chamber’s filter slot. Comes included with a high-efficacy pleated air filter, capable of trapping 0.3-1.0 micron-sized particles such as:

• Dust
• Dirt
• Lint
• Odor

The duct flanges fit with matching sized 4” inline fans and enable a streamlined installation to create high efficiency filtration in HVAC and grow applications. Attaching the air filter box in the starting end of your ductwork will dramatically reduce suspending particles in the air inside your home. Use with a high static pressure fan like the CLOUDLINE Series of duct fans is highly recommended to ensure maximum filtration.

Product Identification AIR FILTER BOX 4 INCH / 100 MM
Manufacturer	AC Infinity Inc.
Product Name	Air Filter Box 4"
Product Model	AC-AFB4
UPC Code	819137021693
Product and Mounting Dimensions
Duct Opening Size	3.81 in. (9.7 cm)
Total Dimensions	23.46 x 8.42 x 11.73 in. (59.6 x 21.4 x 29.8 cm)
Flange Size	3.21 in. (8.2 cm)
Product Performance and Technical Specs
Box Material	Steel
Flange Material	Aluminum
Finish	Matte Black
Filter Size	Accepts 12 x 20 x 1”
Minimum Airflow Range	80-120 CFM
Maximum Airflow	400 CFM
Compatible Fan Models	CLOUDLINE S4, CLOUDLINE T4
Product Manual
Product Manual