Frequently Asked Questions: About Air Cleaners I am interested in SafeZone 4000V, but would like more specific installation instructions before I will make this purchase. About Air Filters Which filter should I buy? How soon can I get the Air Sponge Filter? Do you sell air conditioner & furnace filters? Odor Removal How can I remove odors? Our Company What is Air Sponge Filter Company? How do I return something? Employment Are there any job opportunities with your company? Other I'm trying to find a replacement filter for a General Air Cleaner #AC-1, filter number 12758. It's an accordian-type filter (for a forced-air furnace) that fits into a series of slats. Can I purchase this filter here? WHAT DOES HEPA STAND FOR how do I track a package