Air Box Stealth High Flow Charcoal Filters (previously Airtech Carbon) are powerful air filtering systems that use 100 percent premium virgin coconut charcoal to destroy odors in their tracks! 

Easy to install and maintain, they are adaptable to any round ductwork. The Air Box is an IN-LINE filter that creates an air tight connection for continuous worry-free operation. Airbox units are made specifically to fit between floor joists to save space and add headroom. The high-flow carbon (charcoal) cartridges are easily replaced, without having to dismantle your ventilation setup.

Rather than using a standard filter, Air Boxes use cartridges that are lightweight and inexpensive compared to standard filters. Your initial investment is a little higher, but the money saved over the long haul buying replacement cartridges makes the Air Box an economical filtering system.

These fan filters have high CFM ratings:

Air Box 1 Stealth Edition - 400 CFM
Flange size = 4"
Dimensions 8.5" x 12.5" x 24"
Weight = 18 lbs
Holds 1 cartridge
Cartridge dimensions - 12" x 20" x 1"

Air Box 2 Stealth Edition - 1000 CFM
Flange size = 6"
Dimensions 22.5" x 10"x 12"
Weight = 24 lbs
Holds 2 cartridges
Cartridge dimensions - 12" x 20" x 1"

Air Box 3 Stealth Edition - 1500 CFM
Flange size = 8"
Dimensions 30" x 12" x 12"
Weight = 45 lbs
Holds 3 cartridges
Cartridge dimensions - 12" x 20" x 1"

Air Box 4 Stealth Edition - 2000 CFM
Flange size = 10"
Dimensions 32" x 12" x 15"
Weight = 59 lbs
Holds 4 cartridges
Cartridge dimensions - 12" x 24" x 1"

Air Box Stealth Filters include the charcoal cartridges so they are ready to use out of the box. The Air Box Stealth is made in the USA. Suitable for commercial or residential applications.