MRCOOL 5th Gen 35ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY35-3858C-O

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MRCOOL 5th Gen DIY 35ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY35-3858C-O

Name: MRCOOL 5th Gen DIY 35ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY35-3858C-O
Brand: MRCOOL
SKU: DIY35-3858C-O
Price: 565.00 USD
Availability: InStock

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SKU: DIY35-3858C-O

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$565.00

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35 ft pre-charged lineset for 5th Gen DIY 24K and 36K systems, includes DIYPro cable
3/8" liquid line, 5/8" suction line
Snap-together Quick Connect fittings — no brazing, flaring, or vacuum pump needed
DIYPro cable skips running electrical conduit between units
Pre-charged with eco-friendly R-454B refrigerant

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*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

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Pre-Charged R454B • DIYPRO™ Cable Included • 35-Foot Reach

MRCOOL 5th Gen 35ft 3/8" x 5/8" Lineset for DIY 24K & 36K Indoor Units DIY35-3858C-O

The MRCOOL 5th Gen 35ft Pre-Charged Lineset (DIY35-3858C-O) is the definitive connection solution for homeowners and professionals installing 24,000 or 36,000 BTU 5th Generation DIY mini-split systems. This specialized lineset bridges the gap between your high-capacity indoor air handler and outdoor condenser with a precision-engineered 35-foot span. Unlike traditional HVAC components that require a licensed technician for flaring, vacuuming, and charging, this system arrives factory-sealed and pre-charged with the latest eco-friendly R454B refrigerant, ensuring a 100% DIY-friendly experience that saves time and professional labor costs.

MRCOOL 5th Gen 35ft 3/8" x 5/8" Lineset Applications

Medium-distance residential installs requiring more reach than standard 16ft or 25ft lines.
Routing through attics, crawlspaces, or around exterior walls to reach second-story master suites.
Connecting high-capacity 24K or 36K BTU air handlers in detached workshops or garages.
Installations requiring a clean, professional finish without the need for specialized HVAC tools.

Specifically engineered for 5th Generation DIY systems; provides the exact 3/8" liquid and 5/8" suction diameters required for high-BTU refrigerant volume.

MRCOOL 5th Gen 35ft 3/8" x 5/8" Lineset Specifications

SKU	DIY35-3858C-O
Length	35 Feet
Liquid Line Size	3/8 Inch
Suction Line Size	5/8 Inch
Compatibility	5th Gen DIY 24K & 36K BTU Indoor Handlers
Refrigerant Type	Pre-Charged with R454B
Included Cable	DIYPRO™ Communication Cable

Advanced DIYPRO™ Technology & Construction

A standout feature of this 5th generation lineset is the inclusion of the DIYPRO™ Cable. This heavily shielded communication wire provides superior mechanical protection, safeguarding your system's vital communication links from UV degradation, extreme weather, and pests. By utilizing the DIYPRO™ cable, you effectively eliminate the legal and physical requirement for running traditional electrical conduit, streamlining your installation and reducing overall project material costs while maintaining professional-grade durability and safety standards.

Why Choose the MRCOOL 5th Gen 35ft DIY Lineset

Zero Specialized Tools: Patented Quick Connect fittings create a leak-proof seal with a simple wrench.
Eco-Friendly Performance: Pre-charged with R454B, a low-GWP refrigerant that meets the latest environmental regulations.
Maximum Durability: Robust insulation and DIYPRO™ shielding ensure long-term reliability in any climate.
Cost Efficiency: Empowers you to bypass expensive professional vacuuming and charging fees.

The MRCOOL 5th Gen 35ft DIY Lineset offers the perfect balance of flexibility and performance for demanding high-BTU configurations, giving you the reach you need with the simplicity you demand.

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

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Frequently Asked Questions

This MRCOOL 5th Gen lineset (DIY35-3858C-O) is the 35-foot length, giving more reach than the 16ft or 25ft versions for runs through attics, crawlspaces, or around exterior walls.

Line size depends on the system's capacity. This lineset uses a 3/8" liquid line and 5/8" suction line, matched to MRCOOL 5th Gen DIY 24K and 36K BTU indoor air handlers.

Yes. It arrives factory-sealed and pre-charged with R454B refrigerant, and its patented Quick Connect fittings seal with a simple wrench, so no flaring, vacuuming, or charging is needed.

The DIYPRO cable is a heavily shielded communication wire that protects against UV, weather, and pests and eliminates the need to run traditional electrical conduit between units.

It suits medium-distance installs such as reaching second-story rooms or connecting a 24K or 36K BTU air handler in a detached workshop or garage.

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MRCOOL 5th Gen DIY 35ft 3/8 x 5/8 Lineset for DIY 24K & 36K Indoor w/ DIY Pro Cable - R454B, DIY35-3858C-O

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