Eraldehyde removes formaldehyde and ammonia vapors from the air being breathed in larger rooms. It removes these toxic vapors and chemically converts them into harmless storage within the cartridge. (See performance chart.) Formaldehyde is a toxic organic compound with a pungent, irritating odor. Highly toxic to all animals, it is a known human carcinogen used for post mortem embalming and in certain hair straightening processes. Formaldehyde and ammonia are present at toxic levels in many beauty and nail salons wheret hey are given off by hair coloring chemicals. Eraldehyde-180 is a floor standing, portable device with safe, formaldehyde and ammonia removal technology. It operates using any of the three EC-181 cartridges - F for formaldehyde, A for Ammonia, and FA if both contaminants are present. Eraldehyde works quickly and exchanges room air over 3 times per hour in a midsize (180 sq ft) room and once per hour in a large (540 sq ft) room, so it only needs to be run when you can smell the vapors present. The 2 EC-181 cartridges in the E-180 can last for months, depending upon how frequently and how long the E-180 is run. The Eraldehyde-180 comes with a washable dust filter to protect the EC-181 cartridges from clogging by heavy dust in the air.