Lennox X2661 Humidifier Pad

The Lennox X2661 Humidifier Pad (Model WP2-18-1) is a critical maintenance component designed for high-efficiency moisture transfer in compatible Lennox power and bypass humidification systems. Also identified by part number X266101, this replacement evaporator pad features a honeycomb filtration media coated with a specialized clay surface. This hydrophilic treatment ensures uniform water distribution across the water panel, maximizing the evaporative surface area to prevent dry air issues in residential or light commercial applications. For technicians servicing WB2-17, WB2-18, or WP2-18 units, maintaining the evaporative humidifier filter is essential for protecting the HVAC system from mineral scale buildup and ensuring the solenoid valve delivers the correct flow rate. Replacing the Lennox X266101 water panel annually preserves the humidifier performance and prevents stagnant water accumulation within the cabinet, effectively managing indoor air quality during the heating season.

• OEM Compatibility: Exact replacement for Lennox models WB2-17, WB2-18, WP2-18, and WP2-18A, ensuring a precise fit in the scale control insert.
• Optimized Evaporation: Advanced clay-coated media provides superior wicking action for consistent humidity output.
• System Protection: Effectively traps mineral contaminants from the water supply, reducing scale buildup inside the humidifier housing.
• Structural Integrity: Built to withstand commercial-grade airflow without collapsing or shedding media into the ductwork.

Common Service Questions

Is the X2661 interchangeable with the X266101?
Yes, the Lennox X2661 and X266101 are the identical technical part number for the WP2-18-1 humidifier pad. They are used interchangeably in manufacturer catalogs.

How often should this water panel be replaced in high-mineral areas?
In regions with hard water, the evaporator pad should be inspected mid-season. While standard maintenance is once per year, heavy scale buildup can restrict airflow and reduce evaporation efficiency.

Does this pad fit other brands besides Lennox?
This 13-1/8" x 10" x 1-3/4" pad is specifically engineered for the Lennox WB2 and WP2 series. Always verify the dimensions and model number on the scale control insert before installation.

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.