MRCOOL® 27K 4-Zone DIY® Mini Split System (6K + 9k + 12k) Air Handlers & three 25ft QuickConnect® Line Sets- R-454B DIYM327HPW04D21

Product Description 

Model: DIYM327HPW04D21

The MRCOOL® DIYM327HPW04D21 4-Zone Mini Split System is engineered for homeowners who want professional-level comfort with true DIY installation. Built around the MRCOOL® DIY® 5th Generation 27,000 BTU multi-zone condenser, this system delivers efficient heating and cooling across four independently controlled zones, making it ideal for bedrooms, offices, bonus rooms, or additions with different comfort needs.

This bundle pairs a 6K, 9K, and 12K BTU wall-mounted air handler configuration, allowing precise temperature control for mixed room sizes while maximizing system efficiency. Each zone operates independently, so you only condition the spaces you’re using—reducing energy waste and improving comfort.

Installation is made simple with MRCOOL® DIY® QuickConnect® technology, eliminating the need for vacuum pumps, refrigerant handling, or licensed HVAC labor. The system includes three 25-foot factory-sealed QuickConnect® line sets, all pre-charged with R-454B refrigerant, providing flexibility for longer runs and cleaner installations.

Premium features like Gold Fin® corrosion protection, Follow Me® temperature sensing, and full smart control via the MRCOOL® Smart HVAC Controller® ensure long-term reliability and effortless daily operation. Voice control through Amazon Alexa and Google Assistant is supported out of the box.

If you want a future-proof, high-efficiency multi-zone system that installs cleanly and performs like a professionally installed setup, the MRCOOL® DIYM327HPW04D21 is an excellent choice.

WHAT’S INCLUDED IN THIS COMPLETE DIY® BUNDLE

✔ MRCOOL® DIY® 4-Zone Outdoor Condenser

• Model: DIY-MULTI4-27HP230D-O

• 27,000 BTU | 208/230V | 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.

✔ (1) MRCOOL® DIY® 9K BTU Wall-Mounted Air Handler

• Model: DIY-09-HP-WMAH-230D25-O

• Ideal for rooms up to ~350 sq. ft.

✔ (1) MRCOOL® DIY® 12K BTU Wall-Mounted Air Handler

• Model: DIY-12-HP-WMAH-230D25-O

• Ideal for rooms up to ~550 sq. ft.

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

• Model: DIY25-1438-O

• 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 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 designed specifically for homeowner installation.

Do I need HVAC tools or refrigerant handling?

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

Can each room be controlled independently?

Yes. Each indoor unit operates as its own zone.

Is this system smart-home compatible?

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

Is R-454B refrigerant future-ready?

Yes. R-454B meets current and upcoming environmental regulations.

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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