HM512: 12 gallons per day (gpd) (45 liters per day [lpd])
HM509: 9 gpd (34 lpd)
HM506: 6 gpd (23 lpd)
Dimensions: 11-1/4 in. W x 19 in. H x 9 in. D
Humidifier Operating Temperature Range: 34ºF–
Remote Hose/Nozzle Operating Temperature Range:
Operating Humidity Range: 0–95% RH, non-
Auto flushing is configurable to 10, 20 or 30 hours of
operational time (heating element active).
During auto flushing, cold water will enter the tank to
lower water temperature below 140ºF (60ºC) before
During manual flush (performed by pressing the
EMPTY button) initial water temperature may be
above 140ºF (60ºC). Ensure drain outlet is not
exposed and use caution when pressing the EMPTY
button, and do NOT attempt to remove the tank with
water in it.
Flush cycle takes approximately 15 minutes to
empty the tank completely. To override, press/hold
the EMPTY button while the "Clean Tank" light is
Drain Hose Operating Temperature Range: 34ºF–
Hot water temperature above 140°F (60°C)
can cause burns from scalding.
Standards & Approval Body Requirements
Underwriters Laboratories: UL998, File no. E185662.
Federal Communications Commission: Class B compliance, File no. YU555.
Intended to be used in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, and the rules of the
Canadian Electrical Code (CEC), Part 1, C22.1.
Filled with Water
Electrical Ratings and Tolerances
Power Supply: 120VAC +10/ -15%, 60Hz
- HM512: 1440W at 120VAC at full load
- HM509: 1200W at 120VAC at full load
- HM506: 840W at 120VAC at full load
HM512: 12A, 120VAC
HM509: 10A, 120VAC
HM506: 7A, 120VAC
15A, 120VAC interlock switch
Thermostat/HVAC power monitor (R to C): 10mA
resistive at 24VAC
Field wiring terminals: 18–22 ga. solid
HVAC power/airflow monitor: 10 mA resistive at 24
Relay output contacts:
- Fan: 1.5A full load, 7.5A locked rotor at 24VAC
- Heat and Backup: 15A resistive at 120VAC
Fill Solenoid: 0.1A at 120VAC, 0.5 PF
Drain Solenoid: 0.1A at 120VAC, 0.5PF
Humidistat output contacts: 10mA resistive at 24VAC
Humidistat power supply: 100mA at 24VAC