MRCOOL DIY 5th Gen E Star 9,000 BTU Single Zone Mini Split Complete System with 25 Ft. Line Set, 115V - DIY-09-HP-WM-115D25-O
Introducing the 5th Gen MRCOOL® DIY® 9K BTU Single Zone Mini-Split Air Handler for year-round heating and cooling in spaces 200 to 350 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 |
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 |
9,000 BTU |
| EER2 |
14 |
| SEER2 |
23.6 |
| Heating Capacity |
10,000 BTU |
| HSPF2-4 |
11.5 |
| HSPF2-5 |
8.6 |
| Coverage Area |
200 - 350 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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Energy Star Rated – High efficiency cooling & heating system that lowers energy bills.
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DIY-Friendly Installation – Comes with 25 ft. pre-charged line set, no special tools or pros required.
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Perfect for Small Spaces – 9,000 BTU capacity ideal for bedrooms, offices, and compact living areas.
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Smart Home Ready – Wi-Fi enabled for control via app, Alexa, or Google Assistant.
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Reliable Year-Round Comfort – Provides both heating and cooling with quiet, consistent performance.
Q&A
Q: What is included in the MRCOOL DIY 5th Gen 9,000 BTU system?
A: It comes as a complete single-zone mini split with indoor and outdoor units, a 25 ft. pre-charged line set, and installation accessories.
Q: Is this mini split energy efficient?
A: Yes, it’s Energy Star certified, offering high efficiency and reduced energy costs.
Q: Can I install it myself without a professional?
A: Absolutely—this system is designed for true DIY installation with pre-charged Quick Connect lines.
Q: What size space does it cool and heat?
A: The 9,000 BTU capacity is ideal for rooms up to about 350 sq. ft., such as bedrooms, offices, or small living areas.
Q: Does it provide both cooling and heating?
A: Yes, it’s a heat pump system that delivers reliable cooling in summer and heating in winter.
Maintenance Tips
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Clean air filters every 2–4 weeks to maintain airflow and efficiency.
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Wipe indoor unit with a soft, damp cloth; avoid harsh cleaners.
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Inspect outdoor condenser regularly for debris, leaves, or blockages.
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Keep a 2–3 ft. clearance around the outdoor unit for proper ventilation.
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Check line set connections periodically for leaks or damage.
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Schedule professional servicing once a year to ensure peak performance.
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Use the self-cleaning function (if available) to reduce mold and bacteria buildup.
Damage 
Loss 
Theft 
