MRCOOL DIY 5th Gen E Star 12,000 BTU Single Zone Mini Split Complete System with 25 Ft. Line Set, 115V (DIY-12-HP-WM-115D25-O)
Introducing the 5th Gen MRCOOL® DIY® 12K BTU Single Zone Mini-Split Air Handler for year-round heating and cooling in spaces 350 to 500 sq. ft. Easy DIY installation with included 25 ft. QuickConnect® line set and DIYPRO® cable. Customize comfort with wireless remote, SmartHVAC app, or voice commands. Industry-leading warranty for reliable, energy-efficient performance.
Features
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DIY Installation: Easy, tool-free setup with no prior experience required.
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DIY® QuickConnect® Line Set: Pre-charged with R-454B refrigerant for quick and vacuum-free installation.
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Environmentally Friendly Refrigerant: R-454B refrigerant has a lower Global Warming Potential (GWP) than older refrigerants like R-410A, reducing environmental impact while improving energy efficiency.
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DIYPRO® Cable: Eliminates the need for electrical conduit, offering enhanced durability against outdoor elements and wildlife.
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Wireless Control Options: Use the included remote, SmartHVAC app (Apple and Android), or voice commands via Amazon Alexa and Google Assistant.
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Follow Me Function: Maintains consistent comfort by adjusting airflow based on the remote’s location.
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Dry Mode: Acts as a dehumidifier to reduce excess moisture and improve indoor air quality.
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Gold Fin® Condenser: Provides corrosion resistance for coastal homes, ensuring long-lasting performance.
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Industry-Leading Warranty: Limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty.
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Certified Quality: Intertek listed 5031495 for reliable performance and safety.
Specifications
| Dimensions & Weight |
| Condenser Dimensions |
30.12 W" x 11.93 D" x 21.85 H" |
| Air Handler Dimensions |
31.57 W" x 7.44 D" x 11.69 H" |
| Condenser Weight |
65.48 lbs / 29.7 kg |
| Air Handler Weight |
24.91 lbs / 11.3 kg |
| Capacity & Performance |
| Zone Capacity |
1 |
| Cooling Capacity |
12,000 BTU |
| EER2 |
12.5 |
| SEER2 |
23.5 |
| Heating Capacity |
12,000 BTU |
| HSPF2-4 |
10.2 |
| HSPF2-5 |
7.6 |
| Coverage Area |
350 to 500 sq ft. |
| Outdoor Noise Level |
54 dB(A) |
| Indoor Noise Level (Hi/Mi/Lo) |
43.0/39.5/33.5/24.0/18.0 dB(A) |
| Electrical Requirements |
| Voltage |
115V |
| Phase |
1 |
| Cycle |
60 Hz |
| Max Fuse Breaker |
20A |
| Min Circuit Ampacity |
18A |
| Refrigerant & Piping |
| Refrigerant Type |
R-454B |
| Refrigerant Volume |
30.34 oz |
| Liquid Line Size |
1/4" |
| Suction Line Size |
3/8" |
| Max Line Set Length |
82 ft. |
| Features |
| Inverter |
DC |
| Compressor Type |
Rotary |
| Fan Only Option |
Yes |
| Quiet Mode |
Yes |
| Auto Cool |
Yes |
| Wifi Compatibility |
Yes |
| App Compatibility |
Yes |
| Works with IOS |
Yes |
| Works with Android |
Yes |
| Remote Control Included |
Yes |
What our Experts Think
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True DIY-Friendly — Pre-charged 25 ft QuickConnect® line set makes installation easy without special tools or vacuum pumps.
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High Efficiency — Impressive 23.5 SEER2 rating saves energy while cooling/heating rooms up to 550 sq. ft.
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Smart Control — Compatible with SmartHVAC app, Amazon Alexa, and Google Assistant for remote and voice operation.
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Built to Last — Gold Fin® condenser resists corrosion; durable DIYPRO® cable protects against weather and pests.
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Eco-Friendly Refrigerant — Uses low-GWP R-454B refrigerant to minimize environmental impact.
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Strong Warranty — Offers 7-year compressor and 5-year parts limited warranty for reliable long-term use.
Q&A
Q: What is the cooling capacity?
A: 12,000 BTU (1 Ton).
Q: Is this system easy to install?
A: Yes, designed for DIY with a complete kit included.
Q: What voltage does it use?
A: Operates on standard 115V power.
Q: What is included in the package?
A: Complete system with indoor/outdoor units and a 25 ft. line set.
Maintenance Tips
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Clean or replace air filters every 1–3 months to ensure efficient airflow
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Keep the outdoor unit clear of debris, leaves, and dirt for optimal performance
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Inspect evaporator and condenser coils annually and clean as needed
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Check electrical connections and refrigerant lines regularly for damage or leaks
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Clear condensate drain lines to prevent water buildup and mold
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Avoid obstructing airflow around indoor and outdoor units
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Schedule annual professional maintenance to extend system lifespan
