The Lennox 22K91 (Cerroset 612203560009) Black Shield Insulated Lineset is engineered for high-performance HVAC installations requiring dependable refrigerant line protection and long-term durability. Featuring a 3/8-inch liquid line, 3/4-inch suction line, and a 1/2-inch insulation wall thickness, this 35-foot plain-end lineset is built to support efficient heat transfer while minimizing energy loss. The rugged Black Shield insulation provides superior UV resistance, moisture protection, and condensation control, making it ideal for residential and light commercial applications.

This Lennox-specified lineset ensures proper compatibility with matching outdoor and indoor systems, delivering reliable operation and simplified installation for HVAC technicians and contractors.

 

Key Features:

• Includes 3/8" liquid line and 3/4" suction line, optimal for many standard HVAC installations
• 1/2" insulation wall helps reduce thermal loss and prevents condensation issues
• 35-foot length supports flexible routing across various system layouts
• Black Shield insulation provides enhanced durability, UV resistance, and moisture protection
• Plain-end design for easy brazing and secure system connections
• Suitable for residential and light commercial Lennox air conditioning and heat pump systems