MRCOOL® 27K 4-Zone DIY® Mini Split System with one 6K + 9k + 9k Air Handlers & three 25ft QuickConnect® Line Sets- R-454B- DIYM327HPW03D21

Product Description 

Model: DIYM327HPW03D21

The MRCOOL® DIYM327HPW03D21 4-Zone Mini Split System is a smart, high-efficiency solution designed for homeowners who want room-by-room temperature control, quiet operation, and a true DIY® installation—without paying contractor labor or handling refrigerant. Built around the MRCOOL® DIY® 5th Generation 27K multi-zone condenser, this system delivers dependable heating and cooling across four separate spaces with precision and flexibility.

Installation is made simple thanks to MRCOOL®’s patented DIY® QuickConnect® technology, which eliminates the need for vacuum pumps, gauges, or HVAC licensing. Every line set arrives factory-sealed and pre-charged with R-454B refrigerant, ensuring faster installs while meeting modern efficiency and environmental standards.

This bundle combines one 6K BTU air handler and two 9K BTU air handlers, making it ideal for bedrooms, offices, nurseries, bonus rooms, or small living areas. The included 25-ft QuickConnect® line sets give you extra installation flexibility for longer or more complex layouts without sacrificing performance.

Comfort and control are taken to the next level with Gold Fin® corrosion-resistant coils, Follow Me® temperature sensing, and full smartphone control through the MRCOOL® Smart HVAC Controller® app. You can also integrate the system with Amazon Alexa or Google Assistant for hands-free control.

If you’re looking for energy savings, independent zone control, and a system you can install yourself, the MRCOOL® DIYM327HPW03D21 is built to outperform traditional systems while keeping long-term costs low.

WHAT’S INCLUDED IN THIS COMPLETE DIY® BUNDLE

✔ MRCOOL® DIY® 4-Zone Outdoor Condenser

• Model: DIY-MULTI4-27HP230D-O

• 27,000 BTU | 230V | DC Inverter Heat Pump

• Max Breaker: 35A | Min Circuit Ampacity: 30.5A

✔ (1) MRCOOL® DIY® 6K BTU Wall-Mounted Air Handler

• Model: DIY-06-HP-WMAH-230D25-O

• Ideal for rooms up to ~200 sq. ft.

✔ (2) MRCOOL® DIY® 9K BTU Wall-Mounted Air Handlers

• Model: DIY-09-HP-WMAH-230D25-O

• Ideal for rooms up to ~350 sq. ft. each

✔ (3) MRCOOL® DIY® 25 ft QuickConnect® Line Sets

• Model: DIY25-1438-O

• Factory pre-charged with R-454B refrigerant

✔ Wireless remotes for each air handler

✔ DIY® QuickConnect® fittings

✔ Factory-sealed refrigerant system

Smart phone not included

⚙️ ELECTRICAL & SYSTEM SPECIFICATIONS

• Voltage: 208/230V
• Phase: Single Phase
• Zones Supported: Up to 4
• Refrigerant: R-454B
• Condenser Max Fuse / Breaker: 35 Amps
• Condenser Minimum Circuit Ampacity: 30.5 Amps
• Installation: True DIY® — No HVAC license required

❓ FREQUENTLY ASKED QUESTIONS 

Can I install this system myself?

Yes. MRCOOL® DIY® systems are engineered specifically for homeowner installation.

Do I need HVAC tools or refrigerant handling?

No. The QuickConnect® line sets are factory-sealed and pre-charged.

Can each room be controlled independently?

Yes. Each air handler has its own thermostat, remote, and app control.

Is this system smart-home compatible?

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

Is R-454B refrigerant future-proof?

Yes. R-454B is more efficient and environmentally friendly than older refrigerants.

Why Buy From MRCOOL DIRECT?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL® dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL® systems from a trusted MRCOOL® dealer.

BUY DIRECT!

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615-553-8118

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