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HSWF3 Humidity Based Fan Control, Light Almond

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Humidity Based Fan Control, HSW, adds intelligent moisture detection to any fan or ventilation system.
Color Light Almond
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  • Turns ON the fan when condensation is present and OFF when dry.
  • Adjusts sensors to solve moisture problems.
  • Helps fight mold.
  • Ultra moisture-sensing adaptive technology (patented).
  • Manual timer settings from 5-60 minutes.
  • Great for tenant and family use.
  • Manual fan control for immediate ventilation.
  • Manual bathroom lighting control (HSWC only).
  • Lets you know the fan is ON.
  • Tamper-proof settings cover.


General Info
Product Line Pass & Seymour
Color Light Almond
UPC Number 785007057409
Country Of Origin China
Application Sector Residential
Standard RoHS
Listing Agencies / 3rd Party Agencies
cULus ListedĀ  Yes
Technical Information
Connection Back and side wire
Coil Voltage 120 V
Contact Rating 6Amps
Amperage 6 A
Action Single Pole
Timing Range 5-60 minutes
Wattage 400 W
Voltage 120.0 V


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Questions & Answers

what cover plate works for this model? I am using the Adorne series in the rest of the hosue

Asked by: JKDPaige
This device will fit into any standard decorator-style wall plate (i.e. TP26W)
Answered by: Wiremold Tech Support
Date published: 2023-08-21

I just installed the HSWF3 humidity control switch. The settings are still factory default. The switch keeps turning on. It will run for a minute and the start again. What is going on and how do I correct it?

Asked by: Paul485
The minus sign is low moisture sensitivity and the plus sign is high sensitivity; the dial can be set anywhere in between. In a very moist environment, lower sensitivity may be needed to avoid excessive fan run-time. In a very dry environment, higher sensitivity may be needed for the sensor to detect moisture. When DewStop senses condensation, the blue LED will pulse slowly. Setting Sensitivity: The factory setting of the moisture sensitivity dial is set to the noon position. If you feel the factory setting is too slow in turning on your fan, turn the dial to the right an hour at a time. Or, if you feel the factory setting turns your fan on too quickly, turn the dial to the left an hour at a time until the desired sensitivity level is reached. Legrand/Pass & Seymour products 1.844.957-3783 Mon - Fri: 8am - 6pm EST (excluding holidays) Email Us - tech.support@legrand.us
Answered by: Legrand Technical Support
Date published: 2022-08-31

Hi Legrand  Any plans to offer the humidity sensing fan control in black to match the rest of our Radiant Collection switches & outlets ? Thank you -e

Asked by: Eric B
We do not have any current plans to release the humidity fan control in black.
Answered by: Legrand Technical Support
Date published: 2021-09-07

Hello, Can HSWF3 be setup to be used on a 3 WAY switch?  Customer wants to be able to turn the fan on at two different switch within the bathroom.  

Asked by: CobraR30
The HSWF3 is for use in a single pole application only.
Answered by: Legrand Technical Support
Date published: 2024-01-19
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