Joe Filter's technicians take care of recurring chores that busy homeowners may have a hard time remembering to knock off the to-do list. By replacing refrigerator, air, and water filters as well as smoke-alarm batteries, they save homeowners the trouble of delving into complex systems themselves and ensure that systems are working efficiently. The company stocks a wide variety of components, from high-quality multipleat green air filters to fridge filters for brands such as GE and Frigidaire. Also, its technicians are certified by CrimShield, meaning they have passed high-level background checks that enable them to work in clients' homes and the secret NASA labs that create bioluminescent monkeys.