Refrigerant Line Sets for HVAC & AC Systems

A line set is the pair of insulated copper lines that carry refrigerant between the outdoor and indoor units of an HVAC system. Voomi Supply carries pre-charged, copper, and mini split line sets, along with covers and other installation supplies to complete the job.

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High-Quality Mini Split Line Sets

Mini split line sets connect the outdoor condenser to one or more indoor units and are typically sold pre-flared and pre-charged for a direct connection, cutting install time compared to field-brazing copper. Sizes are matched to the system's liquid and suction line diameters, so confirm your unit's specifications before ordering.

Reliable HVAC Line Sets for Easy Installation

Copper line sets are sold by diameter and cut to length, giving installers flexibility for custom runs, while pre-charged line sets arrive with refrigerant sealed inside and are ready to connect. Both options are available in a range of sizes for residential and commercial HVAC systems.

Line Set Covers for Protection and Durability

Line set covers shield exposed copper lines from UV exposure, moisture, and physical damage where they run along an exterior wall. Most covers are PVC channel systems that can be cut on site and painted to match the building, and they help extend the life of the line set underneath.

Line Set Sizing by System Type

Line set diameter and length depend on the system's capacity and the distance between indoor and outdoor units. Use the table below as a general guide, then confirm exact sizing against your unit's installation manual.

Line Set Type

Common Diameter Range

Typical Length

Best For

Mini Split Line Sets

1/4" to 3/8" liquid / 1/2" to 5/8" suction

15 to 50 ft, often pre-flared

Ductless single and multi-zone systems

Copper Line Sets (cut-to-length)

3/8" to 7/8", sold by diameter pair

Cut to the length you need

Central AC and heat pump installs, custom runs

Pre-Charged Line Sets

Matched to your unit's rated diameters

Fixed factory lengths

Straightforward replacements and quick installs

 

Comprehensive Line Sets for HVAC Systems

Beyond the line set itself, most installs need a few supporting supplies: line set insulation, flare fittings or couplings, mounting brackets, and a cover kit if the run is exposed. Voomi Supply stocks these installation supplies alongside our line sets for residential and commercial HVAC systems.

Frequently Asked Questions

A line set consists of insulated tubing used to connect the outdoor unit of an HVAC system to the indoor unit. It carries refrigerant between the two components.

We offer a variety of line sets, including pre-charged line sets, copper line sets, and mini split line sets, suitable for both residential and commercial systems.

The right line set depends on the size and type of your system. You can refer to the specifications of your HVAC unit or contact our customer service for assistance.

Yes, our line sets are designed for easy installation. Pre-charged line sets come with refrigerant already inside, making installation quicker and more efficient.

Yes, we offer line sets in various lengths to suit different installation needs. You can find specific length options listed in the product descriptions on our website.

Copper line sets are cut to length and require flaring or brazing on site, giving installers more flexibility on run length. Pre-charged line sets come pre-flared with refrigerant already sealed inside, which speeds up installation but limits you to the set's fixed length.

A line set cover is a channel that hides and protects the refrigerant lines running along an exterior wall. It's not required for the system to run, but it protects the lines from UV damage and impact and gives the installation a cleaner look.