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Overview

Intelligent Humidity Control for Healthier Spaces

The Lutron MS-HS3-WH XactSense Humidity Sensor Switch automatically detects excess humidity and activates exhaust fans to reduce moisture, mold, and mildew. Designed for bathrooms and damp spaces, this smart sensor switch uses advanced signal processing to accurately respond to rapid changes in humidity levels, ensuring your exhaust fans run only when needed.

Key Features & Benefits

  • Automatic humidity detection – Precise sensing technology monitors humidity levels and activates fans automatically as moisture rises
  • Never forget to turn fans on or off – Set-it-and-forget-it operation ensures proper ventilation without manual intervention
  • Energy-efficient operation – Fans run only when needed, saving energy and reducing utility costs
  • Customizable settings – Choose from multiple timeout options (5, 15, 30, 45 minutes), sensitivity levels, and climate thresholds to match your space
  • Ambient Light Detection (ALD) – Optional feature prevents fans from running when bathroom is dark and unoccupied
  • Multiple operating modes – Shower + Climate mode for bathrooms, Shower Only for quick response, or Air Cycle for utility rooms
  • Coordinated design – Pairs with Diva dimmers and Night Mode controls for a consistent aesthetic

Technical Specifications

  • Color/Finish: Gloss White
  • Voltage: 120V AC, 50/60 Hz
  • Ratings: 3A 1/10 HP fan, 3A combined exhaust fan and light
  • Mounting: In-wall, single pole
  • Dimensions: 4.1" tall x 1.7" wide x 1.4" deep (without wall plate)
  • Location: Indoor use only
  • Wiring: Neutral or ground connection required
  • Compliance: UL Listed to U.S. and Canadian safety requirements, meets ICC/ANSI A117.1, California Title 24, and IECC requirements
  • Warranty: 10 years with product registration

Why Choose Lutron XactSense?

Rigorously tested across a wide range of climates and applications, the MS-HS3-WH delivers reliable performance in bathrooms, shower rooms, and other high-humidity environments. The patterned grille design allows accurate humidity sensing while maintaining a clean, professional appearance. With adjustable sensitivity, climate thresholds, and timeout settings, you can fine-tune operation to match your specific needs—from rapid bathroom showers to gradual basement humidity control.

  • Automatic humidity detection – Precise sensing technology monitors humidity levels and activates fans automatically as moisture rises
  • Never forget to turn fans on or off – Set-it-and-forget-it operation ensures proper ventilation without manual intervention
  • Energy-efficient operation – Fans run only when needed, saving energy and reducing utility costs
  • Customizable settings – Choose from multiple timeout options (5, 15, 30, 45 minutes), sensitivity levels, and climate thresholds to match your space
  • Ambient Light Detection (ALD) – Optional feature prevents fans from running when bathroom is dark and unoccupied

Technical Resources

Specifications

Finish:
Glossy White
Size:
1.4'' L X 1.7'' W X 4.1'' H
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Lutron

Since inventing the solid-state dimmer in 1961, Lutron has been the undisputed leader in lighting control technology. The brand is built on a foundation of innovation, quality, and a passion for creating atmosphere and peace of mind through the power of light. From simple, elegant dimmers to complete smart home systems, Lutron offers a comprehensive portfolio of products that transform everyday spaces and provide an unparalleled user experience.

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