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

• 18,000 BTU Output – Ideal for heating & cooling single-zone spaces up to ~750–800 sq ft

• 21.5 SEER2 High Efficiency – Lower utility costs without sacrificing performance

• Pre-Charged with R-454B Refrigerant – Eco-friendly, low-GWP refrigerant

• Gold Fin Condenser Coating – Corrosion-resistant for long outdoor life

• Cold Weather Ready – Operates in temperatures down to 5°F

• True DIY Installation – Quick Connect fittings, no vacuum pump needed

• Warranty – 7-Year Compressor / 5-Year Parts (Lifetime Limited Compressor with registration)

🔲 MRCOOL Ceiling Cassette Air Handler – 18K BTU

• Flush Ceiling Installation – Fits between 16” joists for a seamless appearance

• Multiple Comfort Modes – FAN ONLY, QUIET, SLEEP, AUTO for complete control

• Elevating Air Filter System – Drops up to 4.9 ft for easy, tool-free cleaning

• Unified Aesthetic – Matches MRCOOL multi-zone cassette design

• Smart Home Ready – Wi-Fi enabled, works with Alexa & Google Assistant

• Expandable Design – Visually matches multi-zone setups for future expansion

🔧 Why Choose MRCOOL DIY 5th Gen?

• No HVAC License Required – Perfect for homeowners & skilled DIYers

• R-454B Refrigerant Compliant – Ready for new HVAC regulations

• Pre-Charged Line Sets – No refrigerant handling or vacuuming

• Energy Efficient – Meets or exceeds ENERGY STAR® guidelines

• 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.

Specifications & Dimensions