Lennox Y3012 Humidstat

The Lennox Y3012 Manual Humidistat is a reliable, wall-mount control designed for precise HVAC humidity management in residential and light commercial applications. Engineered for low voltage 24V systems, this mechanical controller features a robust nylon sensing element to monitor indoor air quality and activate humidification equipment when levels drop below the set point. Contractors favor the Y3012 for its electromechanical reliability and straightforward single-pole single-throw (SPST) switching logic. It is compatible with a wide range of bypass and power humidifiers, offering a 10% to 60% relative humidity adjustment range. The analog dial interface ensures simple calibration and set-and-forget operation, reducing call-backs related to complex digital programming. Whether performing a new installation or replacing a failed humidifier control, this unit provides the durability required for long-term moisture regulation in dry climates.

• Reliable Sensing: Uses a high-sensitivity mechanical element for accurate RH level detection without the need for external power beyond the 24V control circuit.
• Universal Compatibility: Facilitates seamless integration with Lennox Healthy Climate systems and most third-party whole-home humidifiers.
• Durable Construction: Built with a classic industrial design to withstand the environmental fluctuations found in mechanical rooms or living spaces.
• Contractor-Friendly Install: Features accessible terminal screws for fast wiring and a standard mounting pattern for quick HVAC control replacement.

Can I use this humidistat with a non-Lennox humidifier?
Yes, the Lennox Y3012 functions as a standard 24V switch, making it compatible with any humidifier that operates on a standard 24VAC control circuit.

Where is the best location to mount a manual humidistat?
For optimal performance, mount the unit on an interior wall at eye level or directly on the return air duct upstream of the humidifier to ensure an accurate sampling of the home's ambient air.

Does this unit require a common (C) wire?
No, as a mechanical humidistat, it operates as a simple switch (break/make) and does not require a constant common wire for power.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.