MrCool DIY 5th Gen 2 Zone 55000 BTU Mini Split Heat Pump System - Choose Your Indoor Units - R454B

MRCOOL DIY® 55,000 BTU 6-Zone Ductless Heat Pump Condenser – Model DIY-MULTI6-55HP230D-O | 230V

Maximum multi-zone power and flexibility for whole-home systems

The MRCOOL DIY® Multi6 55,000 BTU Multi-Zone Condenser is the most powerful unit in the DIY® lineup, supporting up to six indoor air handlers for total climate control across large homes, offices, or multi-room spaces. Designed for true do-it-yourself installation, this system uses pre-charged Quick Connect line sets that require no vacuum pump or specialized tools.

Featuring inverter-driven efficiency, whisper-quiet operation, and built-in Wi-Fi control, the DIY-MULTI6-55HP230D-O delivers industry-leading comfort, flexibility, and energy savings—all backed by MRCOOL’s reputation for innovation and reliability.

Features & Benefits

• 55,000 BTU capacity – supports up to six indoor zones
• 230V operation with variable-speed inverter technology
• DIY installation with pre-charged Quick Connect fittings
• Wi-Fi connectivity for MRCOOL SmartHVAC app, Alexa®, and Google Assistant®
• High-efficiency performance for year-round comfort
• Quiet, durable design for residential or commercial use

MRCOOL DIY® Wall Mounted Air Handlers

Easy-to-install comfort for every room with MRCOOL’s DIY® mini-split technology

The MRCOOL DIY® Wall Mounted Air Handlers deliver exceptional comfort, energy efficiency, and convenience for homes and businesses alike. Available in sizes from 6,000 BTU to 36,000 BTU, these wall-mounted indoor units are designed for use with MRCOOL’s innovative DIY® Ductless Mini-Split Heat Pump Systems. Each air handler offers quiet operation, advanced control options, and easy, no-vacuum installation with the MRCOOL® pre-charged line sets.

Built for DIY installers and professionals alike, these units feature variable-speed inverter technology for precise temperature control, built-in Wi-Fi for smart home integration, and a sleek, modern design that fits comfortably in any space. The washable filters, auto-restart function, and multiple fan modes make maintenance simple while maximizing year-round comfort.

Features & Benefits

• Available in 6,000 to 36,000 BTU capacities to fit rooms of any size
• Designed exclusively for MRCOOL DIY® Ductless Mini-Split Heat Pump Systems
• Easy wall-mounted installation – no vacuum pump or special tools required
• Built-in Wi-Fi for smart home control via the MRCOOL SmartHVAC app, Alexa®, and Google Assistant®
• Variable-speed inverter technology ensures energy-efficient performance
• Quiet operation for enhanced comfort in bedrooms, offices, and living areas
• Washable, reusable filters reduce maintenance costs
• Auto restart and sleep mode for convenience and energy savings
• Factory-approved components for reliability and long service life

MRCOOL DIY® Ceiling Cassette Air Handlers Multi-Zone Ductless Mini-Split Systems

Discreet, powerful comfort for every room — easy to install and built to last

The MRCOOL DIY® Ceiling Cassette Air Handler Series offers premium, built-in comfort for homes and businesses without the need for complicated installation. Designed exclusively for use with MRCOOL DIY® Multi-Zone Ductless Mini-Split Heat Pump Systems, these ceiling-mounted units combine sleek design, whisper-quiet operation, and the industry’s easiest setup — all while delivering powerful heating and cooling performance.

Available in 6,000 BTU, 9,000 BTU, 12,000 BTU, and 18,000 BTU capacities, MRCOOL DIY® Ceiling Cassettes provide flexible, zoned comfort for spaces ranging from small bedrooms to large open living areas. Each model installs seamlessly between standard ceiling joists, maintaining a clean, low-profile appearance that blends into any room design. With built-in Wi-Fi connectivity, users can control temperature settings through the MRCOOL SmartHVAC app, or hands-free via Alexa® and Google Assistant®.

Engineered with inverter-driven technology and four-way directional airflow, these ceiling cassette air handlers distribute air evenly and efficiently across your space. The result is customized comfort, energy savings, and professional-quality performance — all achievable without professional installation costs.

Features & Benefits

• Available in 6,000 – 18,000 BTU models for rooms up to 750 sq. ft.
• Compatible with MRCOOL DIY® Multi-Zone Mini-Split Heat Pump Systems
• Ceiling-mounted design installs between standard joists for a sleek, flush appearance
• Four-way directional airflow ensures consistent comfort throughout the room
• Built-in Wi-Fi control via the MRCOOL SmartHVAC app, Alexa®, and Google Assistant®
• Inverter technology delivers quiet, energy-efficient performance
• Simple DIY installation — no vacuum pump or special tools required
• Ideal for residential or light commercial applications
• Factory-backed reliability from MRCOOL, a trusted name in home comfort innovation

Fast nationwide fulfillment from the USA. Free shipping on qualifying orders over $1,500. See our shipping and returns policy for full details.