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NEW R-454B Refrigerant

MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Air Handler 230V, DIY-18-HP-WMAH-230D25-O

MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Air Handler 230V, DIY-18-HP-WMAH-230D25-O

$931.00 USD
$1,144.99 USD $931.00 USD
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SKUDIY-18-HP-WMAH-230D25-O

TypeAir Handler

Refrigerant Type: R-454B

✅ This item is in stock!

More than 30 available

Estimated Delivery: November 12 – November 14

Based on order date & typical delivery times.
• Orders Typically ship within 2 business days

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PRODUCT DESCRIPTION

MRCOOL DIY® 5th Gen 18,000 BTU Multi-Zone Mini Split Air Handler – 230V

Model: DIY-18-HP-WMAH-230D25-O

Ideal Coverage: Up to 750 sq. ft. • Power: 230V • Refrigerant: R-454B

The MRCOOL® DIY 5th Generation 18K BTU Multi-Zone Wall Mount Air Handler offers year-round comfort for larger areas such as great rooms, bonus rooms, garages, and more. Engineered to pair with MRCOOL® DIY® multi-zone condensers, this indoor unit ensures efficient heating and cooling, modern controls, and simple DIY installation.

🔥 Key Features

  • DIY Installation: No vacuuming or special tools needed. Perfect for homeowners and pros alike.
  • QuickConnect® Line Set: Pre-charged with R-454B refrigerant for fast, mess-free hookup
  • Green Refrigerant: Lower Global Warming Potential (GWP) than R-410A for reduced environmental impact
  • DIYPRO® Cable: Outdoor-rated armored cable for superior durability without electrical conduit
  • Smart Wireless Control: Includes remote and integrates with the SmartHVAC App, Amazon Alexa, and Google Assistant
  • Follow Me Technology: Maintains your target temperature based on where the remote is located
  • Dry Mode: Reduces humidity and improves indoor air quality

📏 Room Size Coverage

This unit is ideal for larger rooms up to 750 sq. ft., including open-concept living areas or oversized bedrooms.

🛡️ Industry-Leading Warranty

  • Compressor: 7-Year Warranty
  • Parts: 5-Year Warranty
  • Lifetime Replacement: Available through MRCOOL® Care Program Enrollment

⚠️ Compatibility Notice

This air handler is pre-charged with R-454B refrigerant and is not compatible with older R-410A systems. Always pair with MRCOOL® 5th Gen R-454B multi-zone condensers and components for proper function.

Buy from MRCOOL DIY Direct – America’s most trusted source for DIY HVAC systems and parts.

SPECIFICATION & DIMENSIONS
Specification Details
Model Number DIY-18-HP-WMAH-230D25-O
Cooling Capacity 18,000 BTU/h
Heating Capacity 18,000 BTU/h
Recommended Coverage Area Up to 750 sq. ft.
Power Supply 208–230V, 60Hz, 1 Phase
Minimum Circuit Ampacity 5 A (est.)
Maximum Fuse 15 A (est.)
Refrigerant Type R-454B
Line Set Size 1/4" Liquid x 1/2" Gas
Communication Cable Included Yes, 4-conductor
Wireless Control Remote, SmartHVAC App, Alexa, Google Assistant
Remote Sensor (Follow Me) Yes
Dry Mode Function Yes
Mounting Type Wall-Mounted
Dimensions (WxDxH) Approx. 39" x 8.5" x 12.5"
Net Weight Approx. 26 – 30 lbs
ETL Listing Number 5031495