Legrand HSWF3W Humidity-Based Fan Control - 6A, Single-Pole, White
Legrand HSWF3W Humidity-Based Fan Control - 6A, Single-Pole, White
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About this item
About this item
- Automatic Moisture Detection: Intelligent humidity sensor activates exhaust fan when moisture rises above adjustable 50-80% RH threshold
- Adjustable Time Delay: Fan continues running for 5-60 minutes after humidity drops to ensure complete moisture removal and prevent mold growth
- Manual Override with LED Indicator: Push-button control allows instant fan operation independent of humidity sensing with visual confirmation light
- Tamper-Proof Settings Cover: Protects adjustment dials from accidental changes once configured—great for tenant and family use
- Ultra Moisture-Sensing Adaptive Technology: Patented technology continuously adjusts to environmental conditions for optimal ventilation performance
Shipping & Returns
Shipping & Returns
Shipping: Enjoy free standard shipping on most orders over $99. (Exclusions apply for oversized & commercial items). We ship to the contiguous 48 United States.
Returns: We offer a 60-day return window for most items. Products must be in their original, unused condition with all packaging. (Exclusions: Special orders, clearance, and custom items).
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Description
Description
Legrand HSWF3W Humidity-Based Fan Control
The HSWF3W is a Legrand Pass & Seymour humidity-based fan control in white designed for automatic bathroom ventilation management. Experience superior comfort and energy efficiency with intelligent humidity sensing that activates your exhaust fan only when needed. This single-function control features a 6A humidity sensor fan switch with adjustable settings and manual override—ideal for bathrooms, laundry rooms, and moisture-prone spaces requiring automated ventilation control.
Legrand HSWF3W Features
- Automatic Humidity Detection: Senses moisture levels and automatically activates exhaust fan when humidity rises above set threshold
- Adjustable Humidity Setpoint: Customize activation threshold from 50% to 80% relative humidity to match your space requirements
- Adjustable Time Delay: Fan continues running for 5 to 60 minutes after humidity drops to ensure complete moisture removal
- Manual Override: Push-button control allows manual fan operation independent of humidity sensing
- LED Indicator Light: Visual confirmation when fan is operating in automatic or manual mode
- 6A Fan Capacity: Controls exhaust fans up to 6 amps (720W at 120V)
- Single-Pole Configuration: Standard single-location wiring for straightforward installation
- White Finish: Matte white finish coordinates with standard decorator wallplates
- Standard Wallbox Compatibility: Fits in single-gang wallbox for easy installation or retrofit
- No Programming Required: Simple dial adjustments for humidity threshold and time delay settings
- Tamper-Proof Settings Cover: Protects adjustment dials from accidental changes once configured
- Ultra Moisture-Sensing Adaptive Technology: Patented technology adjusts to solve moisture problems efficiently
Humidity-Based Fan Control Applications
- Residential bathrooms and powder rooms
- Master bathroom suites with showers and tubs
- Laundry rooms and utility spaces
- Basement bathrooms and moisture-prone areas
- Guest bathrooms and en-suite facilities
- Multi-family residential units
- Light commercial restrooms
- Hospitality guest room bathrooms
Installation & Operation
The Legrand HSWF3W installs easily in a standard single-gang wallbox and requires a neutral wire connection for proper humidity sensor operation. Set your desired humidity activation level using the adjustment dial (50-80% RH range)—when bathroom humidity exceeds this threshold, the fan automatically activates. The time delay dial allows you to program how long the fan continues running after humidity drops below the setpoint (5-60 minute range), ensuring complete moisture removal and preventing mold growth. The manual override button provides instant fan control when needed, regardless of current humidity levels. An LED indicator illuminates when the fan is operating, providing clear visual feedback. The tamper-proof settings cover protects your configured settings from accidental adjustment. The patented Ultra Moisture-Sensing Adaptive Technology continuously monitors and adjusts to environmental conditions, providing optimal ventilation performance while minimizing energy waste.
Compatible Fans & Loads
- AC Fan Motors: Up to 6A (720W at 120V) for bathroom ventilation fans
- Voltage Rating: 120V AC, 60Hz
- Wiring: Single-pole configuration with flying leads wire connection
- Wire Size: #14 - #12 AWG
- Note: Requires neutral wire connection for humidity sensor operation. Not suitable for fan speed control—provides on/off switching only. Not compatible with CFL, halogen, incandescent, or LED loads.
Why Choose Legrand Pass & Seymour Humidity Controls
Legrand is a global leader in electrical and digital building infrastructure with over 150 years of innovation and excellence. The Pass & Seymour HSWF3W represents intelligent environmental control, combining advanced humidity sensing technology with practical design. This automatic fan control eliminates the guesswork of manual ventilation, protecting your bathroom from excess moisture, mold growth, and structural damage while reducing energy waste from unnecessary fan operation. The adjustable humidity setpoint and time delay settings allow precise customization for your specific space and climate conditions, while the manual override ensures flexibility when immediate ventilation is needed. With reliable humidity detection, tamper-proof settings protection, and straightforward installation in a standard wallbox, the HSWF3W delivers professional-grade moisture management for residential and light commercial applications. Great for tenant and family use with RoHS compliance and limited lifetime warranty coverage.
Why Buy From Us: As an authorized Legrand dealer, we guarantee 100% genuine products with full manufacturer warranty and expert customer support.
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Frequently Asked Questions
What does a humidity switch do?
What does a humidity switch do?
A humidity switch monitors the moisture level in the air and automatically turns on a ventilation fan when it detects high humidity, then turns it off once the air has cleared.
Where should I install a humidity sensor switch?
Where should I install a humidity sensor switch?
They are most effective in bathrooms, laundry rooms, home spas, and basements—anywhere prone to condensation, dampness, or mold growth.
Will the fan turn on every time it rains?
Will the fan turn on every time it rains?
Not if you have a high-quality humidity sensor switch. Modern sensors use "rate-of-rise" technology to distinguish between the fast moisture increase of a shower and the slow, natural increase of a rainy day.
Can I manually turn the fan on?
Can I manually turn the fan on?
Yes. Every humidity switch includes a manual override button. If you need immediate ventilation for odors, you can press the button to run the fan for a set "timeout" period.
How long does the fan stay on?
How long does the fan stay on?
This is determined by your "Time Delay" setting. Most switches allow you to choose between 10, 20, 30, or 45 minutes. The fan will run for this duration or until the humidity drops below your set threshold.
