Skip to content
Contact Us Price Match Guarantee FAQs Why Buy From Us About Us Customer Reviews Installer Program
MRCOOL DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (9K + 9K + 9K + 24K) Ductless Mini-Split Air Conditioner and Heat Pump

MRCOOL DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (12K + 12K + 12K + 18K) Ductless Mini-Split Air Conditioner and Heat Pump
Starting at $211/mo or 0% APR with . See if you qualify
Save 10% Save 10%
$6,787.00
$6,787.00 - $6,787.00
$6,787.00
$6,080.00
$6,080.00 - $6,080.00
$6,080.00
✓ Authorized MRCOOL Dealer
✓ Lowest Price Match Guaranteed
✓ Brand New & FREE Shipping
✓ Questions? Talk to a MRCOOL Expert: 1-303-876-7654

DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (12K + 12K + 12K + 18K) Ductless Mini-Split Air Conditioner and Heat Pump

Enjoy customized comfort in multiple rooms with the MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4-Zone Ductless Heat Pump Split System. This powerful and energy-efficient system includes three 12,000 BTU air handlers, each covering up to 550 square feet, and one 18,000 BTU air handler designed for larger spaces up to 800 square feet. Whether you need to cool in the summer or heat in the winter, this system adapts to your needs with its advanced heat pump technology that efficiently pulls warmth from the outside air.

Forget costly installation fees—this MRCOOL DIY system features Quick Connect pre-charged line sets filled with R-410A refrigerant, allowing you to set it up yourself without specialized tools or professional help. We provide step-by-step video guides, making installation straightforward and stress-free. The 4th Gen MRCOOL DIY system is also expandable, supporting up to five indoor units, so you can add more zones as needed.

Each of the four air handlers provides customizable airflow direction, ensuring even air distribution for optimal comfort in every corner of the room. Need a quick cooling test? Switch to manual mode using the hidden button beneath the front panel. For added convenience, the mute function turns off sound alerts and display lights—perfect for bedrooms and quiet spaces.

With easy installation, smart controls, and year-round energy efficiency, the MRCOOL DIY Multi-Zone 48,000 BTU 4-Zone Ductless Heat Pump Split System is the perfect solution for maintaining comfort while saving on energy and installation costs.

  • Easy DIY® Installation
  • "Pre-charged DIY®
  • Quick Connect Line Set
  • Simple to Use
  • Multi-room Comfort
  • Energy Efficient DC Inverter
  • 100% Sealed System
  • Gold Fin® Condenser
  • Eco Safe R-410A Refrigerant
  • Smartphone App Controls
  • Lifetime Technical Support
  • Follow Me® Feature
  • Low Ambient Cooling
  • 16ft Line Set for Each Air Handler
  • Reach out to our team for pricing on longer Line Sets

Your Satisfaction with MRCOOL is Guaranteed:

  • 5 Year Parts Warranty, 7 Year Compressor Warranty
  • Lowest Price Guarantee