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

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 offers next-generation efficiency, low environmental impact, and true do-it-yourself installation. This single-zone system features a premium ceiling cassette air handler designed for discreet comfort, delivering powerful heating and cooling performance without sacrificing aesthetics.

Unlike traditional wall-mounted units, the MRCOOL ceiling cassette installs between standard 16” ceiling joists, making it the ideal low-profile solution for modern residential and office spaces. This model uses MRCOOL’s latest R-454B refrigerant, which has a lower Global Warming Potential (GWP) and is fully compliant 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)
✔ 25 Ft. MRCOOL Pre-Charged Quick Connect Line Set – R-454B
(No vacuum or special tools required – standard length)

💬 Need a longer line set?
We offer extended length options using additional pre-charged line sets with couplers and control wire to achieve total runs of 41', 50', 60', or 75' — perfect for flexible installation scenarios.

🌡️ MRCOOL 5th Gen Heat Pump Condenser – Key Features

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

• 21.5 SEER2 High Efficiency – Save on utility bills without sacrificing performance

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

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

• Cold Weather Ready – Operates in temperatures as low as 5°F

• True DIY Installation – Quick Connect fittings eliminate the need for vacuum pumps

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

🔲 MRCOOL Ceiling Cassette Air Handler – 18K BTU

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

• Auto Swing & Comfort Modes – FAN ONLY, QUIET, SLEEP, AUTO for full control

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

• Unified Aesthetic – Same cassette design used across MRCOOL’s multi-zone setups

• Smart Home Ready – Wi-Fi enabled and compatible with Amazon Alexa & Google Assistant

• Expandable Design – Though used as a single-zone unit, this system aligns visually with multi-zone cassettes for future additions

🔧 Why Choose MRCOOL DIY 5th Gen?

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

• R-454B Refrigerant Compliant – Ready for the next generation of HVAC standards

• Pre-Charged Line Sets – No handling refrigerant 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 the best in ductless HVAC technology — discreet, high-efficiency climate control with installation you can manage yourself. Whether you're upgrading a single room or adding comfort to your home office or guest suite, this 5th Gen DIY mini-split is built for performance, convenience, and compliance.

🔗 Shop now at MRCOOL DIY Direct and stay cool the smart, easy way.