What's in the box
- 25 FT Copper Liquid Line (1/4")
- 25 FT Copper Suction Line (1/2")
- Factory-Flared Fittings (ready to connect)
- Protective Insulation
Free curbside shipping on eligible MRCOOL® systems across the continental U.S. Most products ship in 3–5 business days and arrive in 4–10 days, depending on your location. Freight carriers will call to schedule delivery.
Returns accepted within 30 days on new, unopened items in original packaging. A restocking fee of up to 35% may apply for HVAC equipment — we’ll always confirm before issuing a return authorization.
Each MRCOOL® system is backed by manufacturer warranty coverage as defined by product and model — typically 5–10 years on major components. Register your system after installation to activate full coverage.
Need help with sizing, voltage or compatibility? Email support@coolheatdirect.com — our U.S. team replies within one business day.
MODEL: MC25-1412
The MRCOOL® 25 FT Flared Line Set Kit (MC25-1412) is designed for 12K and 18K MRCOOL® Ductless Mini Split Systems, providing a secure, professional-grade connection between the indoor and outdoor units.
Constructed from durable copper tubing with pre-flared fittings, this line set ensures easy installation and reliable performance. Its 25-foot length provides additional reach and flexibility, making it ideal for setups where indoor and outdoor units are farther apart.
Unlike No-Vac® pre-charged line sets, the MC-series uses traditional flared connections, making it perfect for HVAC professionals and installers who prefer more control over the installation process.
Why Choose This Line Set
✅ 25 FT Copper Line Set – more flexibility for extended installs
✅ Flared Fittings – pre-flared for accurate, secure connections
✅ Compatible with 12K & 18K Units – engineered for smaller-to-mid rooms
✅ Durable Construction – heavy-duty copper with protective insulation
✅ Installer-Friendly – reliable performance for long-term use
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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