Lennox 25U77 – Lennox CK40, CK40CT-30/36B, 2.5 to 3 Ton, TXV (R-454B), Cased Aluminum Upflow R-454B Dedicated Evaporator Coil

Product Overview
The Lennox 25U77 evaporator coil is a factory-engineered aluminum cased upflow coil designed for use with R-454B systems in the 2.5 to 3 ton range. Built for high efficiency and long-term reliability, this CK40/CK40CT-30/36B coil provides consistent cooling performance while protecting against corrosion and refrigerant-side wear. The integrated TXV ensures precise refrigerant control, enhancing system efficiency, comfort, and overall equipment longevity.

Key Features
• Compatible with 2.5 to 3 ton Lennox R-454B cooling systems
• Factory-installed TXV calibrated for R-454B refrigerant
• Durable all-aluminum coil design for improved corrosion resistance
• Upflow configuration for flexible installation in residential applications
• Cased construction for cleaner installs and improved airflow performance
• Engineered for quiet, efficient, and reliable cooling operation
• OEM Lennox replacement part for CK40 and CK40CT-30/36B applications

Specifications
• Tonnage: 2.5 to 3 Ton
• Refrigerant: R-454B
• Coil Type: Cased aluminum upflow
• Valve Type: TXV (factory installed)
• Application: Residential split-system cooling
• Compatibility: CK40, CK40CT-30/36B series