Product Description
HDFS3P1-W-L Humidity Sensor and Fan Control from Eaton is a flush-mount wall control that automatically runs a ventilation fan when moisture rises, then shuts it off when humidity drops back below your selected threshold. Designed for damp spaces where comfort and mold prevention matter, it replaces a standard single-pole switch while adding intelligent humidity-based automation plus convenient manual control.
Quick Highlights
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Product Benefits
- Helps reduce mold and mildew risk: automatically removes moisture by running the fan when humidity spikes.
- Comfort without constant switching: maintains better air quality in damp rooms with hands-free operation.
- Simple customization: choose a high, medium, or low humidity setting to match your space and fan performance.
- Manual control when you want it: turn the fan on for immediate ventilation, then let the control handle shutoff automatically.
Key Features
- Automatic humidity response: turns the fan on when the preset humidity level is reached and off when it drops below the preset.
- Selectable humidity thresholds: High, Medium (default), or Low humidity control levels.
- Dual operation: supports manual fan operation plus sensor-based automation.
- Time-delay shutoff: designed to continue ventilating after activation for improved moisture removal (see specifications note below).
- Flush-mount design: clean, in-wall installation that replaces a single-pole switch.
- Ideal for damp areas: bathrooms, basements, laundry rooms, and home spa spaces.
Enhanced Specifications
Technical Specs
| Model | HDFS3P1P1-W-L |
| Voltage / Frequency | one hundred twenty volts AC, sixty hertz |
| Switch Type | single pole, flush mount |
| Humidity Control Range | forty-five percent to eighty percent relative humidity |
Performance Specs
| Maximum Fan Load | three amps (fan load) |
| Motor Rating | up to one-quarter horsepower |
| Humidity Settings | High (eighty percent RH), Medium (sixty-five percent RH, default), Low (forty-five percent RH) |
| Time Delay Note | Documentation lists different fan time delays. The instruction sheet describes a twenty-minute delay, while the technical data sheet lists a thirty-minute delay. Verify the configured behavior on the installed device or product packaging for your specific unit. |
Physical Specs
| Mounting | flush mount, in-wall control |
| Color | white |
Compliance & Safety
| Listings | UL/cUL listed (testing and code compliance noted on technical data) |
| Warranty | limited two-year product warranty |
Application Examples
- Bathrooms: automatically clears steam after showers and helps keep mirrors and surfaces drier.
- Laundry rooms: reduces lingering moisture from dryers, washers, and wet clothing.
- Basements: helps manage damp air that can lead to odors and mildew.
- Home spas: supports consistent ventilation in high-humidity relaxation spaces.
Installation Tips
- Turn power off at the breaker before starting any wiring and confirm power is off.
- Neutral wire required: this control requires a neutral conductor for operation.
- Use copper wire only and ensure all connections are secure before mounting the device.
- Wire by function: connect black to line (hot), red to fan (load), white to neutral, and green to ground.
- Programming basics: press and hold the fan button to enter programming mode, then tap to select high, medium, or low humidity setting.
- Allow sensor timing: the automatic humidity response can include a short delay before turning the fan on, and manual shutoff can temporarily pause sensor operation depending on the selected mode.
SEO-Optimized FAQ
What does the HDFS3P1P1-W-L control?
It controls a ventilation fan based on room humidity. When moisture rises above your selected humidity threshold, it can automatically turn the fan on and then shut it off after humidity drops below the preset level.
Where is this humidity sensor and fan control commonly installed?
It is commonly used in damp areas such as bathrooms, basements, laundry rooms, and spa-like spaces where humidity can build up and lingering moisture is a concern.
Can I choose how sensitive the humidity sensor is?
Yes. The control offers three selectable humidity levels: high, medium (default), and low, allowing you to match operation to the room’s typical moisture conditions.
Does it have a built-in time delay for the fan?
Yes, the device uses a time-delay approach to keep the fan running after activation for better moisture removal. Documentation lists different delay durations, so it is best to verify the behavior on your specific unit after installation.
Can I turn the fan on manually?
Yes. The control supports manual fan operation for immediate ventilation needs, then it can return to automatic operation depending on the selected mode and timing.
Is a neutral wire required?
Yes. A neutral wire is required for operation. If your wall box does not have a neutral conductor, the control will not function properly in that location.
What fan load can it handle?
The control is intended for ventilation fan loads up to three amps and supports motor loads up to one-quarter horsepower.
How do I change the humidity setting?
Use the programming method described in the installation guide: enter programming mode by holding the fan button, then tap the button the required number of times to select your preferred humidity level and save the setting.
