MRCOOL 55K 6‑Zone DIY Mini Split System w/ 18K + 36K Air Handlers 55,000 BTU Multi‑Zone Heat Pump System DIYM255HPW04D00

MRCOOL 55K 6‑Zone DIY Mini Split System w/ 18K + 36K Air Handlers 55,000 BTU Multi‑Zone Heat Pump System DIYM255HPW04D00

The MRCOOL 55K 6‑Zone DIY Mini Split System w/ 18K + 36K Air Handlers is a high‑performance, multi‑zone HVAC solution designed to bring complete comfort control to your home without the cost of professional installation. Built around the advanced MRCOOL DIY 5th Generation 55,000 BTU double‑stack condenser, this system delivers powerful heating and cooling across six zones with precise energy‑efficient performance. The unit’s balanced design pairs an 18,000 BTU wall‑mounted air handler ideal for medium‑sized rooms and a 36,000 BTU air handler built to cool or heat expansive living spaces like great rooms or workshops.

Installation is remarkably simple thanks to MRCOOL’s DIY QuickConnect® pre‑charged line sets, eliminating the need for vacuum pumps, refrigerant handling, or specialized HVAC tools. The included DIYPRO® communication cable further streamlines setup by removing the need for electrical conduit. Once installed, the system works seamlessly with the MRCOOL Smart HVAC Controller® so you can adjust each zone’s temperature from your smartphone or integrate with smart home platforms like Amazon Alexa and Google Assistant for hands‑free control. Whisper‑quiet operation, corrosion‑resistant components, and robust warranties make this an attractive solution for year‑round comfort and long‑term reliability.

Features

• 55,000 BTU total system capacity for whole‑home comfort.

• Supports up to 6 independently controlled comfort zones.

• Includes 18,000 BTU and 36,000 BTU wall‑mounted air handlers for flexible space conditioning.

• DIY® QuickConnect® pre‑charged line sets for effortless installation.

• DIYPRO® communication cable eliminates need for electrical conduit.

• Smart HVAC integration with smartphone control and voice assistant compatibility.

• Gold Fin® corrosion‑resistant coils for enhanced outdoor durability.

• Whisper‑quiet operation with inverter‑driven compressor.

• ENERGY STAR® and AHRI certified for efficiency and performance.

Specifications

What’s Included 

• ✔ MRCOOL® DIY-MULTI6-55HP230D-O
  55,000 BTU 6-Zone 5th Gen DIY® Multi-Zone Double-Stack Condenser (230V)
• ✔ MRCOOL® DIY-18-HP-WMAH-230D25-O
  18,000 BTU Wall-Mounted Air Handler (up to ~800 sq ft)
• ✔ MRCOOL® DIY-36-HP-WMAH-230D25-O
  36,000 BTU Wall-Mounted Air Handler (up to ~1,550 sq ft)
• ✔ MRCOOL® DIY16-1412-O
  16 ft DIY® QuickConnect® Line Set (1/4” x 1/2”)
• ✔ MRCOOL® DIY16-3858-O
  16 ft DIY® QuickConnect® Line Set (3/8” x 5/8”)
• ✔ DIYPRO® communication cable
• ✔ Wireless remotes for each indoor unit
• ✔ Wall mounting hardware & installation accessories

Frequently Asked Questions (FAQ's)

Q: Is this system truly DIY® installable?

Yes. DIY® QuickConnect® line sets are factory-charged, eliminating vacuuming and refrigerant handling.

Q: Can I add more indoor units later?

Yes. The condenser supports up to six total zones, allowing future expansion.

Q: Does this system support smart home integration?

Yes. Works with the MRCOOL® Smart HVAC Controller®, Amazon Alexa, and Google Assistant.

Q: What warranty coverage is included?

• 5-Year Parts Warranty
• 7-Year Compressor Warranty
• Limited Lifetime Replacement Warranty with MRCOOL® Care enrollment