The AprilAire 80LC Low Conductivity Steam Canister is optimized for use in areas where the water conductivity is less than 300 us/cm or when the steam humidifier is installed in 120VAC power applications. The steam canister is a key element of your AprilAire Model 800 or 865 Steam Humidifier, responsible for generating the steam that your humidifier then distributes throughout your home. Current runs between two electrodes within the canister, heating your water to a boil and creating steam that is distributed through your HVAC system. The steam is created by heating water in this internal canister. Replace the steam canister and O-ring once per heating season. Inspect electrode wires every year and replace every three years, or sooner if they become loose or damaged. AprilAire Steam Canisters are designed and made in the USA by AprilAire, the leader in Indoor Air Quality solutions for the home since 1954.