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  • 12,000 BTU MRCOOL DIY mini split air handler with SmartHVAC app, Alexa, and voice control – R-454B system
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MRCOOL DIY® 5th Gen 12,000 BTU Multi-Zone Mini Split Air Handler 230V, DIY-12-HP-WMAH-230D25-O

MRCOOL DIY® 5th Gen 12,000 BTU Multi-Zone Mini Split Air Handler 230V, DIY-12-HP-WMAH-230D25-O

$689.00 USD
$846.99 USD $689.00 USD
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SKUDIY-12-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 12,000 BTU Multi-Zone Mini Split Air Handler – 230V

Model: DIY-12-HP-WMAH-230D25-O

Ideal Coverage: Up to 550 sq. ft. • Power: 230V • Refrigerant: R-454B

The MRCOOL® DIY 5th Generation 12K BTU Multi-Zone Wall Mount Air Handler is the perfect addition for your home comfort solution. Built for reliable heating and cooling all year round, it’s designed to pair with MRCOOL® 5th Gen DIY® Multi-Zone Condensers. This indoor unit is ideal for medium-to-large rooms like master bedrooms, living areas, home offices, and more.

🔥 Key Features

  • DIY Installation: Simple, tool-free installation—no vacuum pump or special tools required
  • QuickConnect® Line Set: Pre-charged with R-454B refrigerant for easy and fast connection
  • Green Refrigerant: R-454B has a lower Global Warming Potential (GWP) than R-410A, making it more environmentally friendly
  • DIYPRO® Cable: Rugged, armored cable eliminates the need for traditional electrical conduit
  • Smart Controls: Operate with the included remote, SmartHVAC app, or voice commands via Alexa and Google Assistant
  • Follow Me Function: Automatically adjusts comfort based on your remote's location
  • Dry Mode: Reduces humidity to improve air quality

📏 Room Size Coverage

This unit is recommended for rooms up to 550 sq. ft., such as larger bedrooms, living rooms, or media areas.

🛡️ Industry-Leading Warranty

  • Compressor: 7-Year Warranty
  • Parts: 5-Year Warranty
  • Optional Lifetime Replacement: Enroll in the MRCOOL® Care Program

✅ Certified Performance

ETL Listed: Intertek #5031495 ensures performance, safety, and reliability.

⚠️ Important Compatibility Note

This 5th Gen MRCOOL® air handler uses R-454B refrigerant and is not compatible with previous generation R-410A systems. Use only with matching MRCOOL® 5th Gen R-454B DIY® Multi-Zone Condensers and components.

Trust MRCOOL DIY Direct – America’s most reliable source for genuine MRCOOL® replacement HVAC systems, parts, and accessories.

SPECIFICATION & DIMENSIONS
Specification Details
Model Number DIY-12-HP-WMAH-230D25-O
Cooling Capacity 12,000 BTU/h
Heating Capacity 12,000 BTU/h
Recommended Coverage Area Up to 550 sq. ft.
Power Supply 208–230V, 60Hz, 1 Phase
Minimum Circuit Ampacity 4 A (est.)
Maximum Fuse 15 A (est.)
Refrigerant Type R-454B
Line Set Size 1/4" Liquid x 3/8" 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. 31.5" x 7.5" x 11.75"
Net Weight Approx. 20 – 22 lbs
ETL Listing Number 5031495