MRCOOL DIY® 5th Gen 55,000 BTU Multi-Zone Mini Split Condenser 230V, DIY-MULTI6-55HP230D-O

Engineered for large, multi-zone applications, the MRCOOL® DIY 5th Gen 55,000 BTU Multi-Zone Mini Split Condenser delivers up to 61,000 BTU of total connected indoor capacity. Easily cool or heat up to six separate zones using a combination of MRCOOL 5th Gen air handlers—ranging from compact 6K BTU all the way up to powerful 36K units. Designed for easy DIY installation, this unit is pre-charged with eco-friendly R-454B refrigerant and does not require special tools or HVAC licenses for setup.

Key Features

• DIY Installation: Pre-charged Quick Connect® line sets require no vacuuming—connect and go
• Smart Controls: Fully compatible with the SmartHVAC App, Amazon Alexa, and Google Assistant
• R-454B Refrigerant: Lower GWP and EPA-compliant for reduced environmental impact
• Gold Fin® Protection: Anti-corrosive coating for long-lasting outdoor performance
• DIYPRO® Cable: Armored and weatherproof—no electrical conduit needed
• Warranty Coverage: 7-Year compressor, 5-Year parts, and optional Limited Lifetime Replacement with MRCOOL® Care Program

System Specs

• Cooling Capacity: 55,000 BTU/h
• Heating Capacity: 56,000 BTU/h
• SEER2: Up to 21.5 (based on handler configuration)
• HSPF2-4: ~10.3 | HSPF2-5: ~8.2
• Power Supply: 208–230V, 60Hz, 1 Phase
• Minimum Circuit Ampacity: 34 A
• Maximum Fuse: 40 A
• Refrigerant Type: R-454B (Charge: ~160 oz)
• Line Set Sizes: 3/8″ Liquid x 5/8″ Gas
• Recommended Coverage: 2,000 – 2,600 sq. ft. (depending on layout and zone usage)

Compatible Air Handler Combinations (Max 61,000 BTU)

This high-capacity 6-zone condenser supports 6K, 9K, 12K, 18K, 24K, and even 36K 5th Gen air handlers. A minimum of 2 zones must be connected. Total indoor capacity must not exceed 61,000 BTU.

Sample valid combinations:

• 36K + 18K + 6K = 60K
• 24K + 12K + 12K + 9K = 57K
• 18K + 12K + 9K + 9K + 6K + 6K = 60K
• 12K + 12K + 12K + 12K + 12K = 60K