420 Purifier comes with a three (3) year limited warranty from the date of retail purchase. Warrants against defects in materials and workmanship under normal use for 3 years from date of retail purchase from www.420purifier.com and from authorized 420 Purifier retailers by the original purchaser. If a valid claim under this Limited Warranty is received within the 3 year warranty period, we will, at its discretion, either: (1) Repair the defect; or (2) Exchange the device for a new one. Warranty does not cover damage caused by accident, abuse, misuse, flood, fire, earthquake, or other external causes. Warranty also does not cover damage caused by the device being exposed to or coming in contact with moisture (e.g. liquids, water, rain, extreme humidity, unusually heavy perspiration or other moisture), extreme thermal or environmental conditions (e.g. sand, food, dirt or similar substances) or any kind of damage caused by operating the device outside the permitted or intended use as described by the manual. Activated carbon is not covered by the warranty.