Understanding Mini Split Line Sets and Their Cost Implications
Updated September 2026
A mini split line set is a crucial component of a ductless mini split system, connecting the outdoor compressor to the indoor air handler. The length of the line set can significantly impact the overall cost of the system. At Old West Minisplits, we include the line set in our flat installed prices, which start at $2,000 for a 1-zone system, $3,700 for a 2-zone system, and $5,400 for a 3-zone system. Our flat pricing includes equipment, labor, line set, standard electrical, refrigerant, testing, cleanup, and even a Home Depot run for touch-up paint. We also disclose any potential exceptions upfront, such as a very long line set, a panel upgrade, or unusually difficult mounting. This transparency ensures that you know exactly what you're getting and what you'll pay.What is a Mini Split Line Set?
A mini split line set consists of two insulated copper pipes that carry refrigerant between the outdoor compressor and the indoor air handler. The length of the line set can vary depending on the specific installation requirements, but it's typically between 15-50 feet.
Why Does Line Set Length Matter?
The length of the line set can impact the cost of the system because longer line sets require more materials and labor to install. Additionally, longer line sets can also affect the system's performance and efficiency. At Old West Minisplits, we factor in the cost of the line set into our flat installed prices, so you don't have to worry about surprise add-ons or trip fees.
Flat-Price Installation with Old West Minisplits
Unlike most local HVAC contractors who provide custom quotes, Old West Minisplits offers flat-price installation for new ductless mini split systems. Our prices are corridor-wide, covering Austin and the I-35 corridor, north to Waco/Killeen and south to San Antonio. This means that you can enjoy the benefits of a mini split system, including cooling and heating capabilities, without the hassle of surprise costs or add-ons.
How we compare
| Factor | Old West Minisplits | The usual |
|---|---|---|
| Price per zone | $2,000-$5,400 | $3,000-$6,000 |
| Installation process | Flat-price, upfront quote | Custom quote, in-home sales visit required |
| Line set inclusion | Included in flat price | Often quoted separately or as an add-on |
| Service area | Austin and I-35 corridor | Varies by contractor |
| System capabilities | Cooling and heating | Cooling only (window units, portable ACs) |
Straight answers
What if my line set is very long?
We disclose any potential exceptions upfront, including very long line sets, and work with you to find a solution.
Can I use a mini split system for heating?
Yes, mini splits are heat pumps that can provide both cooling and heating capabilities, making them a great option for Central Texas's mild winters.
How do mini splits compare to window units or portable ACs?
Mini splits are generally more efficient, quieter, and don't block windows or drip condensate like window units or portable ACs.
What if my existing system is malfunctioning?
If your existing system is failing or aging, it may be more cost-effective to consider a flat-price new installation quote from Old West Minisplits rather than chasing repairs on an old system.
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