Lennox 90X52 – Cerroset 408802508139 is a high-quality insulated refrigerant lineset designed for ductless and mini-split HVAC systems. This 25-foot lineset includes a 1/4 inch liquid line and a 1/2 inch suction line, pre-insulated to reduce thermal loss, prevent condensation, and improve overall system efficiency. Manufactured for durability and long-term performance, this lineset is suitable for both residential and light commercial mini-split installations.

Designed to meet the installation standards of Lennox ductless systems, this Cerroset lineset comes equipped with factory-installed flare nuts, allowing for faster, cleaner, and more reliable connections. The black UV-resistant insulation provides added protection in exposed or outdoor applications while maintaining a clean, professional appearance.

This insulated mini-split lineset is ideal for system replacements, new installations, or repairs where proper refrigerant flow, insulation integrity, and connection reliability are critical.

 

Product features and benefits:

• 25-foot insulated refrigerant lineset for ductless and mini-split systems
• Line sizes: 1/4 inch liquid line x 1/2 inch suction line
• Factory-installed flare nuts for secure, leak-resistant connections
• Black UV-resistant insulation helps prevent condensation and energy loss
• Suitable for residential and light commercial mini-split applications
• Compatible with Lennox and other major ductless HVAC systems

Typical applications:

• Ductless mini-split heat pumps and air conditioners
• Replacement or extension of existing refrigerant piping
• New mini-split system installations