The Leviton R02‑DHS05‑1LM is a smart, hands‑free humidity‑sensing ventilation control designed to automatically activate your bathroom or ventilation fan whenever moisture levels rise—helping prevent condensation, mold, and mildew while improving indoor air quality. Engineered with Leviton’s advanced digital sensing technology, this Decora‑style device continuously monitors room humidity and triggers the fan only when needed, reducing energy use and safeguarding your home’s comfort.

Ideal for bathrooms, basements, laundry rooms, and home spas, the R02‑DHS05‑1LM replaces a standard single‑pole switch and supports fans up to ¼ HP, with compatibility across a wide variety of lighting and fan/light combinations. Its slim, modern design fits into most wallboxes and can be installed with or without a neutral wire, offering flexibility for both new construction and retrofit applications.

With adjustable humidity thresholds, sensitivity settings, and selectable time‑out delays, it provides customizable ventilation control tailored to your environment. The user‑friendly design allows settings to be changed without removing the wallplate, and the clean white finish complements any Decora wallplate.

Key Features

• Automatic Humidity Detection: Detects excess humidity and activates the ventilation fan to reduce condensation and help prevent mold and mildew. 
• Advanced Digital Sensing Technology: Continuously monitors relative humidity levels using a microprocessor‑based system for accurate, reliable operation. 
• Flexible Installation: Can be installed with or without a neutral wire, making it suitable for both older homes and modern wiring layouts. 
• Adjustable Settings: Users can customize humidity sensitivity, humidity level triggers, and fan time‑out (10, 20, 30, or 45 minutes). 
• Supports 1/4 HP Motors: Ideal for bathroom exhaust fans or ventilation systems. 
• Easy Configuration: Adjust settings without tools and without removing the faceplate or wallplate. 
• Energy Efficient: Helps reduce energy usage by running the fan only when required to control humidity. 
• Slim, Decora‑Style Design: Modern aesthetic with a slim profile that fits most wallboxes and pairs with Decora or Decora Plus screwless wallplates. 

Specifications

• Voltage: 120 VAC, 60 Hz 
• Motor Load: Up to 1/4 HP (3A fan load) 
• Lighting Load Compatibility:
  • 600W incandescent
  • 300W LED/CFL
  • 400VA ELV/MLV 
• Humidity Range: Adjustable 45%–80% RH 
• Time‑Delay Options: 10, 20, 30, or 45 minutes after humidity reduction
• Wire Requirements: Neutral optional (connect to neutral or ground depending on installation) 
• Dimensions: 4.13" H × 1.73" W × 0.95" D (device body) 
• Color: White (W‑L finish) 
• Switch Type: Single‑pole control
• Standards/Compliance: UL/cUL Listed; meets ASHRAE 62.2, California Title 24, and CALGreen requirements. 

Applications

Ideal Locations

• Bathrooms
• Laundry rooms
• Basements
• Home spas
• Utility rooms

Benefits

• Helps eliminate moisture buildup
• Prevents mold and mildew growth
• Improves ventilation efficiency
• Reduces unnecessary fan runtime
• Enhances overall indoor air quality