The MRCOOL DIY 4th Gen 18K BTU Mini-Split Heat Pump System is the perfect solution for efficient and hassle-free heating and cooling in a single-zone setup. This system includes a sleek ceiling cassette air handler, designed to provide powerful, discreet comfort while maintaining a modern aesthetic.

Unlike traditional wall-mounted units, the MRCOOL DIY Ceiling Cassette is installed between standard 16” ceiling joists, offering a low-profile, space-saving alternative. This model is identical to the multi-zone compatible ceiling cassette used in MRCOOL’s multi-zone configurations but is designed specifically for a single-zone system.

With industry-leading 22 SEER efficiency, pre-charged DIY line sets, and no HVAC professional required, this system is built for easy installation and long-term performance.

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What's Included in the Bundle?

✔ MRCOOL DIY 4th Gen 18K BTU, 1.5 Ton, 22 SEER Heat Pump Condenser (Model: 18HP230C)
✔ MRCOOL DIY 4th Gen 18K BTU, 21.8 SEER Ceiling Cassette Air Handler (Model: DIYCASSETTE18HP-230C25)
✔ Pre-Charged 25 Ft. DIY Line Set (No vacuuming or special tools required)

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MRCOOL DIY 4th Gen Heat Pump Condenser – Key Features

• 18K BTU Output – Perfect for cooling and heating a single-zone space.
• 22 SEER High Efficiency – Helps reduce energy costs while maintaining superior comfort.
• Durable Gold Fin Condenser Coating – Corrosion-resistant and designed to withstand harsh weather conditions.
• All-Weather Performance – Operates efficiently in temperatures as low as 5°F.
• Pre-Charged DIY Installation – The included line set comes pre-filled with R-410A refrigerant, eliminating the need for a vacuum pump or special tools.
• Eco-Friendly – Uses an environmentally safe refrigerant to reduce impact on the environment.
• Industry-Leading Warranty – 7-year compressor / 5-year parts warranty, with lifetime limited compressor warranty available upon registration.

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MRCOOL Ceiling Cassette Air Handler – 18K BTU

• Discreet, Low-Profile Design – Installs between 16” ceiling joists, seamlessly integrating into modern spaces.
• Advanced Comfort Control – Features FAN ONLY, QUIET, SLEEP, and AUTO COOL modes for customizable comfort.
• Elevating Air Filter System – The easy-access filter can be lowered up to 4.9 ft for effortless cleaning and maintenance.
• Multi-Zone Compatibility – Although this unit is designed for a single-zone system, it utilizes the same ceiling cassette style as MRCOOL’s multi-zone configurations, allowing for a consistent, unified look across different rooms.
• Smart Integration – Works with MRCOOL’s DIY 4th Gen Multi-Zone Condensers, allowing future expansion if needed.

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Why Choose MRCOOL DIY?

• No Professional Installation Required – Save thousands in labor costs with true DIY-friendly installation.
• Pre-Charged Quick Connect Line Set – No special tools or refrigerant handling needed.
• Designed for Maximum Efficiency – High SEER ratings ensure optimal performance and energy savings.
• Trusted & Proven Quality – Backed by MRCOOL’s comprehensive warranty and industry-leading support.
• Nationwide Support & Fast Shipping – Buy from MRCOOL DIY Direct, the USA’s most trusted independent MRCOOL dealer.

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Order Your MRCOOL DIY 4th Gen Mini-Split System Today!

Enjoy professional-grade heating and cooling with a system you can install yourself. The MRCOOL DIY 4th Gen Ceiling Cassette Mini-Split is the ideal solution for homeowners who want discreet, energy-efficient, and powerful climate control without the cost of professional installation.

💡 Shop now at MRCOOL DIY Direct and experience the future of DIY HVAC solutions!

Specifications & Dimensions

Condenser Dimensions 26.5" H x 13.46" L x 35.04" W Voltage 240 SEER 22 Heating Capacity 15,001 - 20,000 BTU Refrigerant Type R-410A Avg Coverage Area 750 - 900 Sq Ft Compressor Inverter   Air Handler Dimensions 13.19 in D x 8.98 in H x 50.31 in W Voltage 208/230 SEER 21.8 Cooling Capacity 17000 Heating Capacity 19000 Refrigerant Type R-410A Min Ambient Cool 60F ~ 90F Min Ambient Heat 32F ~ 86F