Leviton DHS05-1LW Humidity Sensor Switch for Bathroom Exhaust Fan | Auto Ventilation

Smart humidity control for bathroom ventilation

The Leviton DHS05-1LW Decora Humidity Sensor Switch provides hands‑free control of a bathroom exhaust fan, turning the fan on when humidity rises and shutting it off as the air dries. The result is steadier air movement and a more comfortable space, whether you’re getting ready for the day or winding down after a shower. This sensor switch is designed to fit busy homes where moisture management matters, including bathrooms, basements, laundry rooms, and spa areas.

Key features at a glance

• Automatic humidity-based fan control for a more comfortable, consistent air flow
• Low-profile design that fits in most standard wallboxes for a clean look
• Flexible wiring: can be installed with or without a neutral wire
• Tool-free adjustments and settings without removing the faceplate
• Versatile placement for bathrooms, basements, laundry rooms, and spa environments

Wiring and retrofit options are designed with practicality in mind. The device supports interchangeable line and load connections, making it easier to swap in the sensor switch during renovations or upgrades. In addition, the wallplate is sold separately, allowing you to match your décor while keeping the installation tidy.

Performance, compatibility, and loads

• Supports up to 1/4 HP fans and works with 300W LED/CFL lighting or 600W incandescent/halogen loads
• 400 VA ELV/MLV compatibility for certain low-voltage devices
• Single-pole configuration for straightforward replacement in standard circuits

From a compliance perspective, this model aligns with modern energy and ventilation standards. It is compatible with 2019 and 2022 California Title 24, Part 6 (Indoor Air Quality and Mechanical Ventilation), CALGREEN Part II, and ASHRAE 62.2. While these references describe performance and requirements, they do not guarantee any specific outcomes. The sensor switch offers a practical approach to maintaining ventilation as moisture conditions change throughout the day.

Design, installation, and everyday use

The slim, in-wall footprint supports a neat installation behind a traditional or contemporary wallplate (wallplate sold separately). The appliance is designed to work with a variety of wiring configurations, enabling retrofit projects and new installs alike. Expect a reliable, simple upgrade that can help keep bathrooms fresh and draft-free, without demanding routine manual operation.