MRCOOL DIY 5th Gen 18k 2-Zone Mini Split Heat Pump. Easy DIY install, R-454B refrigerant. 9k + 9K

MRCOOL DIY 5th Gen 18,000 BTU 2-Zone Mini Split Heat Pump 9K + 9K Air Handlers.

What's included
MrCool DIY-MULTI3-18HP230D-O  - CONDENSER
MrCool DIY-09-HP-WMAH-230D25-O - AIR HANDLER
MrCool DIY-09-HP-WMAH-230D25-O - AIR HANDLER
DIY LINE SET - 16FT
DIYLINE SET  - 25FT

( I can send 16ft or 25ft DIY lines for either air handler at no change in price )

The MRCOOL DIY 5th Generation 18,000 BTU 2-Zone Mini Split Heat Pump delivers efficient, quiet, year-round comfort with true do-it-yourself installation. Designed with pre-charged R-454B refrigerant and MRCOOL’s Quick-Connect® line sets, this system eliminates the need for special HVAC tools or vacuum pumps.

Ideal for homes, garages, offices, workshops, or additions, this multi-zone system allows independent temperature control in two separate spaces from one outdoor condenser.

Key Features

• True DIY Installation – Pre-charged Quick-Connect® line sets
• 2-Zone Comfort Control – Condition two rooms independently
• High Efficiency – Up to ~23 SEER2
• Heating & Cooling – All-season heat pump performance
• Eco-Friendly Refrigerant – R-454B
• Quiet Operation – Low indoor and outdoor sound levels
• Smart Ready – Optional app + voice assistant compatibility

System Specifications

• Total Capacity: 18,000 BTU (1.5 Ton)
• Zones: 2 Indoor Units 9k each
• Voltage: 208 / 230V, Single-Phase
• Refrigerant: R-454B
• Efficiency: Up to ~23 SEER2
• Coverage: Up to ~750 sq ft combined (varies by layout)

What’s Included

• Outdoor condenser
• (2) Indoor air handlers
• Pre-charged Quick-Connect® line sets
• Wireless remotes
• Installation & owner documentation

Why Buy from Maxair?

• Fast, insured freight shipping
• Real support from HVAC professionals
• Perfect for homeowners and DIY installers
• Trusted nationwide shipping

Need help choosing line set lengths or sizing? Our team is happy to help before and after purchase.