MRCOOL® 55K 6-Zone DIY® Mini Split System w/ 18k + 24k Air Handlers- two 16ft Pre- Charged Line Sets- DIYM255HPW03D00

Product Description 

Model: DIYM255HPW03D00

The MRCOOL® DIYM255HPW03D00 is a high-capacity 55,000 BTU 6-zone DIY® mini split system designed for homeowners who want full-home comfort, zoning flexibility, and contractor-grade performance—without contractor labor costs. Powered by the MRCOOL® DIY® 5th Generation double-stack 6-zone condenser, this system delivers efficient heating and cooling across multiple rooms using advanced inverter technology and environmentally improved R-454B refrigerant.

This bundle combines an 18,000 BTU wall-mounted air handler—perfect for medium-to-large rooms—with a 24,000 BTU wall-mounted air handler built for expansive living areas, garages, or workshops. Installation is streamlined with DIY® QuickConnect® pre-charged line sets, allowing you to skip vacuum pumps, gauges, and refrigerant handling entirely. The included DIYPRO® cable eliminates the need for electrical conduit while protecting communications wiring from weather and pests.

Once installed, the system integrates seamlessly with the MRCOOL® Smart HVAC Controller®, giving you full control from your smartphone. Set schedules, adjust each zone independently, monitor energy usage, or control your system hands-free using Amazon Alexa or Google Assistant. Features like Follow Me® temperature sensing, Gold Fin® corrosion protection, and industry-leading warranties make this system a long-term investment that outperforms traditional HVAC solutions in both comfort and efficiency.

This is a true DIY® multi-zone heat pump system built to scale with your home, reduce operating costs, and put total comfort control in your hands.

 WHAT’S INCLUDED IN THIS BUNDLE

• ✔ 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-24-HP-WMAH-230D25-O
  24,000 BTU Wall-Mounted Air Handler (up to ~1,050 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

Smart phone not included

⚙️ KEY SYSTEM SPECS & ELECTRICAL REQUIREMENTS

• Total Capacity: 55,000 BTU
• Zones Supported: Up to 6
• SEER2: 22
• HSPF2-4: 10.6
• Refrigerant: R-454B
• Voltage: 208/230V (Single Phase)
• Max Breaker (Condenser): 45A
• Minimum Circuit Ampacity: 43A
• Inverter-Driven Compressor: Yes
• ENERGY STAR® Certified: Yes
• AHRI Certified: Yes

❓ FREQUENTLY ASKED QUESTIONS 

Q: Is this system truly DIY® installable?

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

Q: Can I add more indoor units later?

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

Q: Does this system support smart home control?

Yes. It 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
• Eligible for the MRCOOL® CareKit program 

 WHY BUY FROM MRCOOL DIRECT

• ✔ Authorized MRCOOL® dealer
• ✔ Factory-fresh equipment with full manufacturer warranty
• ✔ Fast nationwide shipping
• ✔ Knowledgeable DIY® system support
• ✔ Trusted source for advanced multi-zone solutions

When you buy from MRCOOL Direct, you’re backed by real product knowledge—not a call center.

BUY DIRECT!

Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118

Family owned & USAs #1 MRCOOL Authentication Dealer.