This Lennox 21G59 insulated lineset features Cerroset’s Black Shield construction designed for durability, moisture protection, and long-term HVAC performance. Manufactured with a 3/8 inch liquid line and 7/8 inch suction line, this 30-foot lineset provides reliable refrigerant flow for residential and light commercial air conditioning and heat pump systems. The 1/2 inch insulation wall offers excellent thermal protection, reducing energy loss and improving overall efficiency. Its plain-end design ensures easy trimming and clean field connections, making installation straightforward for HVAC professionals. The Black Shield outer jacket offers extra abrasion resistance and UV protection, extending service life in demanding environments.

This lineset is commonly used for Lennox systems requiring a 3/8 x 7/8 configuration, but its universal fit also supports many other HVAC brands that utilize the same line diameters. Ideal for new system installations, replacements, and retrofits.

 

Key Features:

• 30-foot insulated lineset with 3/8 inch liquid line and 7/8 inch suction line
• 1/2 inch Black Shield insulation provides enhanced thermal protection and energy efficiency
• Plain-end tubing for easy trimming and clean field connections
• Durable outer jacket offers abrasion and UV resistance for long outdoor service life
• Compatible with Lennox systems requiring 3/8 x 7/8 linesets and many universal HVAC applications
• Designed for air conditioning and heat pump installations, replacements, and retrofits
• High-quality Cerroset manufacturing ensures consistent performance and refrigerant flow
• Ships coiled and protected to prevent kinking during transport