Evair™ dehumidifier RL series

Model Numbers: RL-3, RL-4, RL-6, RL-9, RL-14, RL-31

These refrigerant-based dehumidifiers are an excellent fit for any commercial application requiring capacity from 70 pints / day (3 lb/h) to 710 pints / day (31 lb/h) @ 80°F, 60% RH

All models are available to order now! Comes with a 5 year warranty.

The Evair™ dehumidifier RL series complements DriSteem’s existing lineup of world-class humidification, evaporative cooling, and water treatment systems, helping implement comprehensive HUMIDITY CONTROL solutions like never before.

Dehumidification removes moisture from the air, offering protection against condensation and frost, as well as against mold, mildew, and fungus. The DriSteem Evair™ dehumidifier RL series dehumidifies the air coming into the unit by passing it over an evaporator coil to drop the air temperature below the dew point of the air. Moisture is removed from the air and drained out of the unit to a common floor or waste drain. The air is then reheated in the condenser coil and exits the unit. Dehumidification occurs until the set point is reached, then shuts off until the control determines a need for operation.

Maintaining a controlled environment will:

  • Prevent damage to sensitive instruments in processing environments
  • Support the plant grow cycle for indoor agriculture such as cannabis
  • Minimize the risk of equipment failure in manufacturing facilities
  • Preserve important materials and artifacts in storage space and museums
  • Safeguard against the spread of viruses and bacteria in dry storage and warehouses

Comprehensive control with the D77 Controller or BACnet humidistat options

The optional D77 control allows the user to set and adjust the humidity setting and turn dehumidification on or off from a convenient location. In this application, the RL series uses an onboard sensor to monitor the relative humidity (% RH) in the space in which it is located and displays the measured relative humidity on the digital display.

  • Control range: 35% – 80% RH
  • Accuracy: +/-5% RH

Features and Benefits

  • The most water removal for your investment with 0.03 or 0.06 gallons per minute
  • Can be suspended or installed on ground level
  • Ducting allows you to separate the unit from the environment, saving space and increasing ease of access
  • 5 year warranty included


Capacity: from 70 pints / day (3 lb/h) to 710 pints / day (31 lb/h) @ 80°F, 60% RH

Control: ±5% RH

Applications: perfect for manufacturing, food processing, breweries, and storage applications

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