HOT ! MRCOOL 18K 3‑Zone DIY Mini Split System with Three 6K Air Handlers & 25 ft QuickConnect Line Sets DIYM318HPW00D15

MRCOOL 18K 3‑Zone DIY Mini Split System with Three 6K Air Handlers & 25 ft QuickConnect Line Sets DIYM318HPW00D15

Experience customizable comfort for up to three rooms with the MRCOOL 18K 3‑Zone DIY Mini Split System with Three 6K Air Handlers & 25 ft QuickConnect Line Sets DIYM318HPW00D15. This all‑in‑one multi‑zone HVAC solution combines a powerful 18,000 BTU outdoor condenser with three 6,000 BTU indoor units — perfect for bedrooms, offices, bonus rooms, or guest spaces up to approximately 150‑200 sq ft each. Designed around MRCOOL’s acclaimed DIY platform, this system lets you install advanced heating and cooling without the need for professional HVAC tools or refrigerant handling, thanks to the pre‑charged QuickConnect® technology.

Each independent zone can be controlled separately via remote, app, or smart assistant, giving you ultimate flexibility in managing comfort throughout your home. The extended 25 ft QuickConnect® line sets provide installation flexibility for longer distances between indoor and outdoor units — ideal for versatile layouts. With high‑efficiency performance, eco‑friendly R‑454B refrigerant, and ENERGY STAR® and AHRI certifications, this system delivers year‑round comfort with lower energy bills. 

Features

• Supports up to 3 independent zones


• High efficiency SEER2-rated performance


• DC inverter compressor for quiet, variable output


• Factory-sealed DIY® QuickConnect® ports — no vacuuming, gauges, or refrigerant handling


• Gold Fin® coated outdoor coil for coastal and high-humidity durability


• ENERGY STAR® & AHRI Certified

Specifications

What’s Included 

Outdoor Unit

• 
  (1) MRCOOL® DIY® 18K 3-Zone CondenserModel: DIY-MULTI3-18HP230D-O
  

Indoor Units

• 
  (3) MRCOOL® 6K Wall-Mounted Air HandlersModel: DIY-06-HP-WMAH-230D25-O
  

Line Sets

• 
  (3) MRCOOL® 25 ft DIY® QuickConnect® Line Sets w/ DIYPRO® CableModel: DIY25-1438-O
  

Accessories

• Wireless remotes


• Wall mounting hardware


• MRCOOL® Smart HVAC Controller® module


• Installation manuals

Frequently Asked Questions (FAQ\'s)

Can each room be set to a different temperature?

Yes. Each zone operates independently through the MRCOOL® Smart HVAC Controller®.

Is this system truly DIY?

Yes. The DIY® QuickConnect® system eliminates vacuuming, brazing, and refrigerant handling.

Why does this bundle include 25-ft line sets?

For longer installation runs or condenser placement flexibility beyond standard 16-ft kits.

Is this system efficient?

Extremely. Inverter technology + R-454B refrigerant = lower energy bills year-round.

Does it support Alexa or Google Assistant?

Yes. Full voice control supported.