MRCOOL DIY 5th Gen E Star 18,000 BTU Single Zone Mini Split Complete System with 25 Ft. Line Set, 230V - DIY-18-HP-WM-230D25-O
Introducing the 5th Gen MRCOOL® DIY® 18K BTU Single Zone Mini-Split Air Handler for year-round heating and cooling in spaces 500 to 750 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.
Specifications
| Dimensions & Weight |
| Condenser Dimensions |
35.04 W" x 13.46 D" x 26.50 H" |
| Air Handler Dimensions |
42.52 W" x 8.90 D" x 13.19 H" |
| Condenser Weight |
93.48 lbs / 42.4 kg |
| Air Handler Weight |
35.49 lbs / 16.1 kg |
| Capacity & Performance |
| Zone Capacity |
1 |
| Cooling Capacity |
18,000 BTU |
| EER2 |
13.7 |
| SEER2 |
22.5 |
| Heating Capacity |
18,000 BTU |
| HSPF2-4 |
11.5 |
| HSPF2-5 |
8.5 |
| Coverage Area |
500 to 750 sq ft. |
| Outdoor Noise Level |
58.5 dB(A) |
| Indoor Noise Level (Hi/Mi/Lo) |
54.5/44.5/40.5/30.5/19.0 dB(A) |
| Electrical Requirements |
| Voltage |
208-230V |
| Phase |
1 |
| Cycle |
60 Hz |
| Max Fuse Breaker |
20A |
| Min Circuit Ampacity |
18A |
| Refrigerant & Piping |
| Refrigerant Type |
R-454B |
| Refrigerant Volume |
44.80 oz |
| Liquid Line Size |
1/4" |
| Suction Line Size |
1/2" |
| Max Line Set Length |
98.4 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 Installation — Pre-charged 25 ft. line set with QuickConnect® fittings makes setup fast and tool-free—no HVAC pro required.
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Energy Star Certified — High 22.5 SEER2 rating delivers powerful cooling and heating with lower energy bills.
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Smart Control Ready — Works with Amazon Alexa, Google Assistant, and the SmartHVAC® app for hands-free, remote control.
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All-Season Comfort — Cools and heats efficiently up to 750 sq. ft., perfect for bedrooms, garages, or home offices.
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Quiet & Built to Last — Operates quietly indoors with a corrosion-resistant Gold Fin® condenser for long-term durability.
Q&A
Q: What cooling capacity does this MRCOOL mini split system have?
A: It offers 18,000 BTU cooling, ideal for medium to large rooms up to 1,000 sq. ft.
Q: Is professional installation required?
A: No, it’s designed as a DIY system with a pre-charged line set for easy, do-it-yourself installation.
Q: What voltage does the system use?
A: Operates on 230V power supply.
Q: Does the system include a line set?
A: Yes, it comes complete with a 25 ft. pre-charged line set for quick setup.
Q: Is this system energy efficient?
A: Yes, it’s E Star rated, ensuring energy savings and eco-friendly operation.
Maintenance Tips
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Clean or replace air filters every 1-3 months to maintain airflow and efficiency
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Keep outdoor unit free of debris, leaves, and dirt for optimal performance
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Inspect and clean evaporator and condenser coils annually
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Ensure the line set and electrical connections are secure and free from damage
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Clear drainage line regularly to prevent water buildup and leaks
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Avoid obstructing airflow around both indoor and outdoor units
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Schedule professional servicing annually for system longevity and warranty compliance
