MRCOOL DIY E Star 3rd Gen 18,000 BTU 20 SEER Ductless Mini-Split Heat Pump – 208-230V – R-454B – DIY-18-HP-230B
Take control of your comfort — without hiring a pro!
The MRCOOL E Star DIY 3rd Gen 18,000 BTU Mini-Split Heat Pump is the ultimate do-it-yourself solution for heating and cooling your space. With a high-efficiency 20 SEER rating, built-in smart WiFi, and cutting-edge R-454B refrigerant, this single-zone system is designed to cool and heat up to 750 sq ft with ease and style.
Whether you’re upgrading your home office, garage, bonus room, or server space — MRCOOL’s DIY-18-HP-230B puts power, performance, and simplicity at your fingertips. No special tools, no expensive installs. Just pure, quiet comfort… anytime, anywhere.
Key Features:
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✅ Easy DIY Installation: Pre-charged Quick Connect® line set — no vacuum pump, no gauges, no hassle
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📱 SmartHVAC WiFi Control: Compatible with Amazon Alexa, Google Assistant, and the SmartHVAC app (iOS & Android)
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⚡ High Efficiency: 20 SEER / 12.5 EER — delivers powerful climate control while keeping energy bills low
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❄️ Low Ambient Cooling: Operates in temps as low as 5°F — perfect for year-round server rooms or greenhouses
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🔁 Auto Restart: Keeps your system running after power outages
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🛡️ Gold Fin® Condenser: Corrosion-resistant and built for coastal environments
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📢 Ultra-Quiet Operation: As low as 31 dBA — whisper-quiet comfort
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🛠️ Leak Detection: Built-in diagnostics alert you to any refrigerant issues
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🌱 Eco-Friendly: Uses next-gen R-454B refrigerant for reduced environmental impact
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🧼 Washable Filters: Reusable and easy to maintain
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🔧 Warranty: 7-Year Compressor / 5-Year Parts / 1-Year Remote (when registered)
Technical Specs:
| BTU Capacity |
18,000 BTU (1.5 Ton) |
| SEER / EER / HSPF |
20 / 12.5 / 10 |
| Coverage Area |
Up to 750 sq ft |
| Voltage / Phase |
208-230V / 1 Phase / 60Hz |
| Refrigerant |
R-454B |
| Line Set Options |
16ft or 25ft Pre-Charged |
| Max Line Set Length |
98 ft |
| Indoor Noise Level |
31 - 45 dBA |
| Mount Type |
Wall Mounted |
| Air Flow |
4-Way with Auto Oscillation |
| Control Options |
LED Panel, Remote, and WiFi App |
| Certifications |
ENERGY STAR®, CSA, AHRI |
What’s Included:
- Indoor Air Handler (42.52" W x 13.19" H x 8.90" D, 30.20 lbs)
- Outdoor Condenser (33.27" W x 27.64" H x 14.29" D, 98.77 lbs)
- Pre-Charged Line Set (16ft or 25ft)
- Remote Control
- Installation Kit
- User Manuals & Warranty Documentation
Downloadable Resources:
Additional Details:
- 📦 Ships in Two Boxes
- 📐 Freight Class: 250
- 📏 Total Dimensions: 75.79" W x 40.83" H x 23.19" D
- ⚠️ Not available for shipping to GU, PR, or VI
- ✔️ Contains Electronics, Batteries, Compressed Gas, and Chemicals
Ready to Ditch the Ducts?
Experience a smarter, quieter, and more efficient way to heat and cool your space — on your own terms. With the MRCOOL DIY E Star 3rd Gen, the power of professional-grade comfort is finally in your hands.
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