MRCOOL DIY 5th Gen E-Star Series 18K BTU, 1.5 Ton, 21.5 SEER2 Ductless Mini-Split Heat Pump System with Ceiling Cassette Air Handler – R-454B
The MRCOOL DIY 5th Gen E-Star Series 18K BTU Mini-Split Heat Pump System delivers next-generation efficiency, low environmental impact, and true do-it-yourself installation. This single-zone package features a premium ceiling cassette air handler for discreet comfort, providing powerful heating and cooling performance without compromising aesthetics.
Unlike traditional wall-mounted units, the MRCOOL ceiling cassette fits neatly between standard 16” ceiling joists, making it the perfect low-profile solution for modern homes and office spaces. This system uses MRCOOL’s latest R-454B refrigerant, offering a lower Global Warming Potential (GWP) and compliance with updated refrigerant regulations.
💡 What’s Included in This Bundle?
✔ MRCOOL DIY 5th Gen 18K BTU, 1.5 Ton, 21.5 SEER2 Heat Pump Condenser
(Model: DIY-18-HP-C-230C)
✔ MRCOOL DIY 5th Gen 18K BTU Ceiling Cassette Air Handler
(Model: DIYCASSETTE18HP-230C25)
✔ Standard 25 Ft. MRCOOL Pre-Charged Quick Connect Line Set – R-454B
(No vacuum or special tools required)
💬 Need a longer line set?
This system is available in the standard 25' length or extended to 41', 50', or 75' total line length. Extended configurations use the included 25' pre-charged line set paired with an additional pre-charged line set connected via MRCOOL couplers, plus a longer control wire. This sectional approach makes running longer lines easier to install, especially in tight or complex routing scenarios.
🌡️ MRCOOL 5th Gen Heat Pump Condenser – Key Features
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18,000 BTU Output – Ideal for heating & cooling single-zone spaces up to ~750–800 sq ft
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21.5 SEER2 High Efficiency – Lower utility costs without sacrificing performance
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Pre-Charged with R-454B Refrigerant – Eco-friendly, low-GWP refrigerant
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Gold Fin Condenser Coating – Corrosion-resistant for long outdoor life
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Cold Weather Ready – Operates in temperatures down to 5°F
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True DIY Installation – Quick Connect fittings, no vacuum pump needed
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Warranty – 7-Year Compressor / 5-Year Parts (Lifetime Limited Compressor with registration)
🔲 MRCOOL Ceiling Cassette Air Handler – 18K BTU
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Flush Ceiling Installation – Fits between 16” joists for a seamless appearance
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Multiple Comfort Modes – FAN ONLY, QUIET, SLEEP, AUTO for complete control
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Elevating Air Filter System – Drops up to 4.9 ft for easy, tool-free cleaning
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Unified Aesthetic – Matches MRCOOL multi-zone cassette design
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Smart Home Ready – Wi-Fi enabled, works with Alexa & Google Assistant
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Expandable Design – Visually matches multi-zone setups for future expansion
🔧 Why Choose MRCOOL DIY 5th Gen?
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No HVAC License Required – Perfect for homeowners & skilled DIYers
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R-454B Refrigerant Compliant – Ready for new HVAC regulations
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Pre-Charged Line Sets – No refrigerant handling or vacuuming
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Energy Efficient – Meets or exceeds ENERGY STAR® guidelines
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Nationwide Support & Fast Shipping – Buy from the #1 Independent MRCOOL Dealer: MRCOOL DIY Direct
🛒 Order Your MRCOOL 5th Gen DIY Ceiling Cassette System Today!
Experience discreet, high-efficiency climate control you can install yourself. Whether you’re upgrading a bedroom, home office, or guest suite, this 5th Gen DIY mini-split is built for performance, convenience, and compliance.
🔗 Shop now at MRCOOL DIY Direct – stay cool and save the smart, easy way.