What's in the box
- 25 FT Copper Liquid Line (1/4")
- 25 FT Copper Suction Line (3/8")
- Factory-Flared Fittings (ready to connect)
- Protective Insulation
MODEL: MC25-1438
The MRCOOL® MC25-1438 25 FT Flared Line Set Kit is designed specifically for 9,000 BTU MRCOOL® Ductless Mini Split Systems, ensuring a secure and efficient connection between the indoor and outdoor units.
Made from durable copper tubing with factory-flared fittings, this line set allows for a smooth, reliable installation. Its 25-foot length offers flexibility for installs where extra reach is needed, making it an excellent choice for homeowners and installers alike.
Unlike MRCOOL® No-Vac® pre-charged line sets, the MC-series provides traditional flared connections—ideal for HVAC professionals who prefer more control during installation.
Why Choose This Line Set
✅ Engineered for 9K Systems – perfect fit for small spaces or single rooms
✅ 25 FT Copper Length – extended reach for flexible installs
✅ Pre-Flared Connections – quick, accurate, and secure fittings
✅ Durable Copper Tubing – long-lasting and reliable
✅ Professional-Grade – trusted performance for years to come
| Feature | Details |
|---|---|
| Model | MC25-1438 |
| Line Set Length | 25 FT |
| Liquid Line Size | 1/4" |
| Suction Line Size | 3/8" |
| Line Set Type | Flared |
| Color | Copper |
| Weight | 17 lbs |
| Dimensions | 29" (D) × 28.5" (W) × 3.5" (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.
-
Genuine MRCOOL® Systems -
DIY-Friendly Installation -
U.S. Shipping -
Secure Checkout -
Sizing Help
