MRCOOL® DIY 5th Gen 36,000 BTU 5-Zone Multi-Zone Mini Split Condenser – 230V

Model: DIY-MULTI5-36HP230D-O

Upgrade your comfort with the MRCOOL® DIY 5th Gen 36,000 BTU Multi-Zone Mini Split Condenser, engineered for fast and simple DIY installation. Supporting up to five zones with a total connected capacity of up to 39,000 BTU, this system gives you customizable comfort and efficient performance year-round. Requires at least 2 connected air handlers and is fully pre-charged with eco-friendly R-454B refrigerant.

Key Features

• DIY Installation: Quick Connect® pre-charged line sets make setup fast and tool-free – no vacuum pump or special tools needed
• Smart Control: WiFi-enabled and compatible with SmartHVAC App, Amazon Alexa, and Google Assistant
• R-454B Refrigerant: Environmentally friendly and compliant with new EPA regulations for lower GWP
• Gold Fin® Coating: Corrosion-resistant for long-lasting performance in coastal and humid environments
• DIYPRO® Cable: Heavy-duty, armored for outdoor durability without requiring electrical conduit
• Industry-Leading Warranty: 7-Year compressor, 5-Year parts, and optional Lifetime Replacement with MRCOOL® Care Program

System Specs

• Cooling Capacity: 36,000 BTU/h
• Heating Capacity: 38,000 BTU/h
• SEER2: Up to 21.5 (depends on configuration)
• HSPF2-4: ~10.3 | HSPF2-5: ~8.2
• Power Supply: 208–230V, 60Hz, 1 Phase
• Minimum Circuit Ampacity: 25 A
• Maximum Fuse: 30 A
• Refrigerant Type: R-454B (Charge: ~101 oz)
• Line Set Sizes: 3/8" Liquid x 5/8" Gas
• Recommended Coverage: 1,400 – 1,700 sq. ft. (depending on zone configuration)

Compatible Air Handler Combinations (Max 39,000 BTU)

Connect 6K, 9K, 12K, 18K, or even 24K air handlers (not exceeding 39,000 BTU total). A minimum of 2 air handlers must be connected. Ideal total indoor load falls between 25,200 – 36,000 BTU (70%–100% of capacity), but you may connect up to 39K BTU total (108% diversity load).

Example combinations include:

• 18K + 12K + 9K = 39K
• 12K + 12K + 12K = 36K
• 9K + 9K + 9K + 9K = 36K
• 24K + 12K = 36K (3 ports unused)
• 18K + 9K + 6K + 6K = 39K

Recommended Wire Size

• Recommended: 10 AWG copper wire – supports 25A MCA and 30A max fuse
• One Size Smaller (12 AWG): Not advised – may exceed ampacity under load and fail local code
• One Size Larger (8 AWG): Beneficial for long wire runs, improving voltage stability and safety

Note: Total indoor unit BTU capacity must be calculated before installation. MRCOOL 5th Gen condensers are pre-charged with R-454B and are not compatible with previous R-410A systems. Always follow installation guidelines.

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