Humidifiers
Control the relative humidity in your home with precision and ease with the Aprilaire 5558 Automatic Digital Modulating Control Package for the 866 Ductless Steam Humidifier. This wall-mounted humidistat boasts a microcomputer design and offers a large LED digital display with a backlight and the ability to lock in your preferred relative humidity set-point from 0 - 100% RH. This control also includes an Outdoor Temperature Sensor which automatically readjusts the humidity set-point based on the difference between the room temperature and the outside temperature to prevent window condensation in colder climates. Additional Wall-Mounted Control Features: Selectable Celsius or Fahrenheit scale. Outputs controlling humidification and dehumidification equipment by means of on/off or proportional output signals for greater flexibility. Modulating Output Signal provides a 0-10Vdc or 2-10Vdc proportional control signal to the humidifier. Integrated sensor for better application flexibility. Programmable Proportaional Band to increase or decrease the sensitivity of the humidifier control. Humidity set-point reset function based on outdoor temperature which helps prevent condensation in colder climates. Humidifier On-Off signal 24Vac dry contact capable of handling up to 1 amp. Proportional High Limit Override to prevent over-humidification within the duct and costly water damage. Multi-level lockable access menu and lockable set point to prevent accidental changes. Indicator when outdoor temperature setback is used for winter compensation.