The Austin Air Cleaner uses a minimum of 13.5 pounds of coconut shell activated carbon and zeolite to remove odors and gases. The HEPA, activated carbon, and zeolite are combined into one large cartridge which weighs about 19 pounds. Natural zeolite is mined from the earth. It is a cream-colored mineral. Zeolite has exceptional abilities for capturing small molecules such as ammonia, formaldehyde, and sulfides.
Air flow becomes restricted through the clean air exhaust outlet.
It's very simple. Just turn the unit upside down and remove the four retaining screws holding the bottom on. Lift off the bottom panel and lift out the old filter cartridge. Replace it with the new filter and screw the bottom panel back on. The entire body of the Austin Air Cleaner is solid steel, which has been welded together to prevent any rattle caused by motor vibration.