Humidity Sensor Switch with PIR Motion for Bathroom Fans - Automated

In this review the TOPGREENER humidity sensor switch with PIR lighting motion sensor is evaluated for homeowners who want automated fan and light control in moist rooms. The switch's main appeal is its combined humidity-triggered fan control and motion-activated light timer, which aims to reduce excess moisture without manual intervention. For bathrooms, laundry rooms or basements where humidity and intermittent occupancy matter, this switch automates ventilation and lighting while offering simple override options and three humidity set points.

Key Features

• Humidity-triggered fan: Automatically turns the ventilation fan on when moisture exceeds the chosen set point to help prevent excess humidity and related problems.
• Three sensitivity levels: Low, medium, and high humidity thresholds let the user match ventilation to the room's needs for more precise control.
• PIR motion lighting: Passive infrared motion sensor activates lights on detection with an adjustable timer to reduce wasted lighting.
• Manual override options: A manual ON/OFF light switch bypasses the timer and a separate switch can bypass the humidity sensor for direct fan control when needed.
• Installation and safety: Requires a neutral wire and is UL Listed for safe use in typical 120VAC residential circuits.
• Adjustable time delay: Time delay for the light can be set between 5 and 30 minutes to suit occupant preference and energy savings.

Who It's For

The switch is best suited to homeowners or renters with access to a neutral wire who want an integrated solution for fan and light automation in bathrooms, laundry rooms, basements, or other high humidity areas. It works well where intermittent occupancy and moisture spikes occur and when reducing manual switching is desired.

It is not ideal for installations without a neutral wire, multi-way circuits, or where the fan load exceeds the 3A maximum. Professionals or DIYers uncomfortable with in-wall electrical work should consult an electrician.

Pros & Cons

Pros

• Combines humidity sensing and motion-activated lighting in a single in-wall switch for compact convenience.
• Three humidity levels and adjustable timer provide flexibility for different rooms and user preferences.
• Manual override switches give full control when automatic operation is not desired.

Cons

• Some users report mixed results with the fan activation, so calibration or wiring checks may be needed in specific installations.
• Requires a neutral wire and is single-pole only, limiting use in certain homes.

Specifications

Our Verdict

The TOPGREENER humidity sensor switch is a practical, value-minded option for users who need combined humidity control and motion-activated lighting in a single wall device. It saves effort by automating fan and light behavior, offers useful sensitivity and timer adjustments, and is a sensible buy for properly wired bathrooms and similar spaces, provided the installer accounts for the neutral wire requirement and the 3A fan limit.

Frequently Asked Questions

Does this switch need a neutral wire?
Yes. The switch requires a neutral wire for installation and will not work properly without it.

Can I use this in a 3-way circuit?
No. The device is for single-pole use only and is not rated for multi-way configurations.

What happens if humidity drops after the fan turns on?
The fan turns off automatically after humidity falls below the preset level; the device also supports a manual bypass if immediate off is needed.