What's in the box
- 16 FT Copper Liquid Line (3/8")
- 16 FT Copper Suction Line (5/8")
- Factory-Flared Fittings (ready to connect)
- Protective Insulation
MODEL: MC16-3858
The MRCOOL® 16 FT Flared Line Set Kit (MC16-3858) is designed specifically for 24K MRCOOL® Ductless Mini Split Systems, ensuring a reliable, efficient, and professional-grade connection between the indoor and outdoor units.
Built with high-quality copper tubing and factory-flared fittings, this line set delivers long-lasting durability and easy installation. With its 16-foot length, it’s an ideal solution for most standard installations, providing flexibility without unnecessary excess.
Unlike No-Vac® pre-charged line sets, the MC-series uses traditional flared connections, making it the go-to choice for HVAC professionals and installers who prefer custom installation options.
Why Choose This Line Set
✅16 FT Copper Line Set – perfectly sized for standard installs
✅ Flared Fittings – pre-flared for secure, accurate connections
✅ Sized for 24K BTU Units – engineered for MRCOOL® 24K mini splits
✅ Durable Copper Construction – built to withstand time and use
✅ Installer-Friendly – lightweight, flexible, and reliable
| Feature | Details |
|---|---|
| Model | MC16-3858 |
| Line Set Length | 16 FT |
| Liquid Line Size | 3/8" |
| Suction Line Size | 5/8" |
| Line Set Type | Flared |
| Color | Copper |
| Weight | 12 lbs |
| Dimensions | 25.5" (D) × 25" (W) × 4.75" (H) |
| Warranty | N/A (covered under system) |
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.
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