The MRCOOL 5th Generation DIY Mini‑Split System brings high-performance climate control that’s truly homeowner‑friendly. Engineered for do-it-yourself installation, this system uses pre-charged QuickConnect® line sets filled with R-454B refrigerant — no vacuum tools needed. You’ll get efficient heating and cooling, smart Wi-Fi control, and long-term durability, all while avoiding the cost of professional install.
MRCOOL DIY 5th Gen 9K BTU Single Zone Mini Split
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Cooling Capacity: 9,000 BTU
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Heating Capacity: 9,000 BTU
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SEER2 (Efficiency): Around 23.5
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Refrigerant: R-454B (eco-friendly)
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Line Set: 25 ft pre-charged QuickConnect line set
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Voltage / Power: 115V
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Noise Level (Outdoor): Approximately 58 dB(A)
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Low Ambient Operation: Works down to very low outdoor temps (around 5°F)
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Compressor Type: DC Inverter (Rotary)
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Corrosion Protection: Gold Fin coating on outdoor unit
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Smart Controls: Wi-Fi enabled; works with MRCOOL SmartHVAC app, plus Amazon Alexa and Google Assistant
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Remote Features: Includes a “Follow Me” sensor that adjusts based on where the remote is located
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Certifications: AHRI, ENERGY STAR (for certain models)
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DIY Installation: Uses pre-charged lines and DIYPRO® cable—no vacuum pump required
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Warranty: 5-year parts, 7-year compressor (with registration)
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Indoor Unit Dimensions: ~31.6″ W × 11.6″ H
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Indoor Unit Weight: ~24 lbs
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Outdoor Unit Dimensions: ~28.4″ W × 19.5″ H × 10.6″ D
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Outdoor Unit Weight: ~55 lbs
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Reviews
The mini split exceeded my expectations. Installation was straightforward thanks to the pre-charged line set, and the unit runs extremely quiet while cooling and heating the space quickly and efficiently. The Wi-Fi/app control is a great bonus, and overall build quality feels solid. It’s a perfect solution for anyone wanting a reliable, high-efficiency mini split without the cost of professional installation.
This MRCOOL mini split is an excellent option for small spaces. Setup was simple and well thought out, even for a first-time installer. The system cools and heats fast, stays whisper quiet, and the efficiency is noticeable right away. Being able to control it from my phone is a nice touch, and overall it delivers professional-level performance at a DIY-friendly price.