MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Condenser 230V, DIY-MULTI3-18HP230D-O

MRCOOL® DIY 5th Gen 3-Zone Multi-Zone Mini Split Condenser

Model: DIY-MULTI3-18HP230D-O

Introducing the all-new 5th Generation MRCOOL® DIY® Multi-Zone Mini Split Condenser, engineered for maximum comfort, efficiency, and convenience. With the ability to cool and heat multiple zones independently, this system is ideal for small homes, apartments, home offices, or workshops. Thanks to its DIY® Quick Connect® pre-charged line sets and intuitive design, you can install it yourself without the need for special tools or HVAC certification.

Key Features

• DIY Installation: Tool-free, vacuum-free setup with no prior experience required
• DIY® Quick Connect® Line Sets: Pre-charged with environmentally friendly R-454B refrigerant
• Smart HVAC Control: Control each zone via the MRCOOL® SmartHVAC® app, Amazon Alexa, or Google Assistant
• DIYPRO® Cable: Durable armored cable eliminates the need for electrical conduit
• Gold Fin® Condenser: Corrosion-resistant coating ideal for coastal environments
• Industry-Leading Warranty: 7-Year compressor, 5-Year parts, and Limited Lifetime Replacement Warranty with registration in the MRCOOL® Care Program
• Certified Quality: Intertek listed 5031495 for tested safety and performance

Air Handler Compatibility

This condenser supports up to three indoor air handlers with a maximum combined capacity of 24,000 BTU. Available air handler sizes: 6K, 9K, and 12K BTU.

Examples of Compatible Combinations:

• 6K + 6K + 12K (24,000 BTU)
• 6K + 9K + 9K (24,000 BTU)
• 6K + 6K + 9K (21,000 BTU)
• 6K + 9K + 6K (21,000 BTU)
• 9K + 9K (18,000 BTU – one port unused)
• 6K + 12K (18,000 BTU – one port unused)

Recommended Wire Sizing

• Recommended: 12 AWG copper wire – safe for 18A minimum circuit ampacity
• One Size Smaller (14 AWG): Not recommended – may overheat under full load and violate electrical code
• One Size Larger (10 AWG): Offers lower voltage drop and extra safety margin

Ideal Coverage Area

Perfect for spaces ranging from 750 to 1,100 sq. ft., depending on your climate zone and insulation quality.

Note: Always verify system configuration before purchasing. Specifications may change during production. Images may be representative only.

Buy from MRCOOL DIY Direct — the USA’s most trusted HVAC dealer for do-it-yourself heating and cooling solutions.