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Water Quality Considerations for Aprilaire Steam Humidifiers
Water quality plays a crucial role in the performance and longevity of an Aprilaire Steam Humidifier. The minerals naturally present in water make it electrically conductive, which is measured in microSiemens per centimeter (µS/cm). While water hardness (measured in grains per gallon) and conductivity are not directly correlated, higher mineral content generally leads to higher conductivity.
Ideal Water Conductivity for Operation
The Steam Humidifier is designed to operate within a conductivity range of 125 to 1,250 µS/cm, which loosely corresponds to water hardness levels between 3 and 36 grains per gallon. Both hard water and softened water are compatible with the system, but each has its own advantages and drawbacks.
Performance Impact of Water Conductivity
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Low Conductivity Water:
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Slower steam production.
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May take up to a week or more to reach rated capacity on 120V systems.
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On 208/240V systems, nominal capacity is typically reached within a few hours.
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Mineral Accumulation & Electrode Exposure:
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As water boils and turns to steam, minerals are left behind, increasing water conductivity.
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Deposits accumulate on submerged electrodes, reducing their effectiveness.
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The water level in the canister rises over time to expose uncoated electrode surfaces, maintaining operation.
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Choosing Between Hard and Softened Water
| Water Type | Benefits | Trade-offs |
|---|---|---|
| Hard Water | - More consistent steam output. - Better energy and water efficiency due to less frequent draining and filling. | - More frequent canister replacement due to mineral buildup on electrodes. |
| Softened Water | - Longer electrode and canister lifespan (depends on water chemistry). | - Requires more frequent draining and refilling. - Less consistent steam output. - Higher water and energy consumption. |
Key Takeaways
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Hard water leads to mineral buildup but improves efficiency and steam consistency.
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Softened water extends canister life but increases maintenance frequency.
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For best performance, ensure water conductivity remains within the recommended range.
Understanding these factors allows for better decision-making when selecting and maintaining an Aprilaire Steam Humidifier.
