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Steam cylinders must be matched to the local water conductivity in order to perform as designed. If not familiar with local water conductivity, check using an instrument ( EZTestr11 Conductivity Tester). You can also have your water tested for conductivity by the city or a local contractor. The following water types are not acceptable:

• Softened water, as this will lead to foam, electrode corrosion and greatly shortened cylinder life.
• Water containing disinfectants or corrosion inhibitors, as these are potential irritants.
• Industrial water, boiler water or water from cooling circuits.
• Any potential chemically or bacteriologically contaminated water.
• Heated water.
• Water with silica deposits.

Overall the humidifier must be supplied with the following water characteristics:

• Pressure between 20psi and 110psi; or 0.1 and 0.8 MPa (1 and 8 bar)
• Temperature between 33° F and 104° F; or 1° C and 40° C
• Flow rate minimum of 0.45 L/min or 0.21 gpm
• Hardness no greater than 40° fH (equal to 400 ppm3 of CaCO),
• Conductivity from 125 to 1250 µS/cm
• Absence of organic compounds