The Lennox 12J29 indoor coil, part number 613139-06A, is an OEM evaporator coil designed to deliver reliable heat transfer and consistent cooling performance in compatible Lennox HVAC systems. Engineered to meet strict factory specifications, this indoor coil supports efficient refrigerant flow, proper airflow, and dependable moisture removal for residential and light commercial applications. Its precision-built design helps maintain system efficiency, improves overall comfort, and ensures long-term operational reliability when installed as a direct replacement.

Manufactured by Lennox, this indoor coil is built for exact fitment and seamless integration with approved air handlers and furnace configurations. The 3R15FPI construction provides balanced airflow resistance and heat exchange efficiency, making it suitable for systems that require stable performance and consistent temperature control. This coil is ideal for professional HVAC installations, repairs, or system restorations where OEM quality and compatibility are required.

 

Specification:

Coil type: Indoor evaporator coil
Lennox part number: 12J29
Manufacturer part number: 613139-06A
Overall dimensions: 24 x 40.5 inches
Tube size: 3/8 inch
Configuration: 3 rows, 15 fins per inch (3R15FPI)
Application: Residential and light commercial HVAC systems
Compatibility: Designed for use with select Lennox air handlers and furnaces
Construction: OEM Lennox design for proper fit, airflow, and heat transfer

This Lennox indoor coil replacement is a dependable solution for maintaining system efficiency, restoring cooling performance, and ensuring long service life. Ideal for contractors and homeowners seeking genuine Lennox components that meet original equipment standards.