Anden Replacement Steam Canister with O-Ring

Standard Steam Canister for the Anden AS35FP, Water Over 300 uS/cm

Anden's electrode steam humidifiers generate steam by running current through water inside a replaceable canister, and that canister mineralizes over time as it boils — it's a scheduled wear part, not a permanent component. Anden sells two versions of the AS35FP's canister, split by the conductivity of the water feeding the unit, since that conductivity level determines which canister design generates steam correctly.

The AS80 canister is Anden's standard-conductivity option, built for water above 300 µS/cm and fitting the AS35FP humidifier model. It's not for use with RO water or softened water, both of which fall outside the conductivity range the canister design expects.

Key Features & Benefits

• Direct Replacement Canister — Matched to the Anden AS35FP steam humidifier's canister housing.
• Includes O-Ring — Ships with the O-ring needed for a sealed installation, not just the canister alone.
• Conductivity-Matched Design — Built for water conductivity above 300 µS/cm — Anden's standard, higher-conductivity canister option.
• Scheduled Wear Part — The canister mineralizes as it boils water, so periodic replacement is expected maintenance.
• Seasonal Replacement Recommended — Replacing at the start of each heating season keeps steam output consistent.

Which Canister Do I Need

This part fits the Anden AS35FP steam humidifier specifically. Match it to your water supply's conductivity rather than assuming either version is a universal fit — the wrong canister for your water conductivity can mean inconsistent steam output.

Water Conductivity and Canister Selection

Electrode steam canisters work by passing current through the water itself, so the water's electrical conductivity — driven by its dissolved mineral content — determines how well a given canister design generates steam. Anden splits its AS35FP canister line into a low-conductivity version for water under 300 µS/cm (or 120VAC installations) and a standard version for water above that threshold. Using the wrong canister for your water's conductivity can mean inconsistent steam output or premature canister failure.

Frequently Asked Questions

What models does this canister fit?

The AS80 replacement canister and O-ring fit the Anden AS35FP steam humidifier model. It's the standard-conductivity counterpart to the low-conductivity AS80LC canister used for softer water or 120VAC installations.

How do I know which canister my system needs?

Check your water supply's conductivity rating — if it's below 300 µS/cm, or if the installation runs on 120VAC, the low-conductivity canister (DH4480LC) is the correct match. Standard water above 300 µS/cm calls for the standard replacement canister (DH4AS80) instead.

How do I install the new canister and O-ring?

Dampen the O-ring with water before inserting it — never use oil or lubricants, which can degrade the seal material. Follow Anden's installation instructions for seating the canister correctly in the humidifier housing.

How often should I replace the canister?

Anden recommends replacing the canister at the start of each heating season for consistent performance, since mineral buildup accumulates gradually as the canister boils water over a season of use. Waiting until steam output visibly drops means running at reduced capacity in the meantime.

Can I use this with RO or softened water?

No, Anden specifies the AS80 is not for use with RO water or softened water. Both fall outside the conductivity range the standard canister design is built around, which can lead to poor steam output or premature failure.