MRCOOL DIY 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (6K + 9K + 12K Air Handlers with 16 ft, 25 ft & 35 ft QuickConnect Line Sets)

MRCOOL DIY 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (6K + 9K + 12K Air Handlers with 16 ft, 25 ft & 35 ft QuickConnect Line Sets)

The MRCOOL DIY® 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (DIYM327HPW04D07) delivers flexible, multi‑room climate control with true DIY installation simplicity. Designed to serve multiple living areas with precise comfort, this system includes a 27,000 BTU outdoor condenser paired with three indoor wall‑mounted units — one 6,000 BTU, one 9,000 BTU, and one 12,000 BTU — enabling independent temperature control in up to four zones. Whether conditioning bedrooms, living rooms, offices, or bonus spaces, this multi‑zone setup adapts to your unique comfort needs.

Installation is streamlined with MRCOOL’s QuickConnect® technology: all included line sets are factory‑sealed and pre‑charged with R‑454B refrigerant, eliminating the need for vacuum pumps or professional HVAC tools. This package includes one 16 ft, one 25 ft, and one 35 ft line set, giving you flexibility to place indoor units at varied distances from the outdoor condenser based on your floor plan and space layout. A DIYPRO® communication cable simplifies electrical hook‑ups to help complete installation with basic tools.

Each indoor air handler comes with its own wireless remote, allowing personalized control of temperature and settings in every zone. Advanced DC inverter technology provides energy‑efficient operation and whisper‑quiet performance year‑round. Smart control compatibility offers modern convenience for remote system adjustments and integration with voice assistant platforms.

Built to last, the outdoor unit features corrosion‑resistant construction that withstands diverse weather conditions. Supported by manufacturer warranty coverage, this MRCOOL DIY® multi‑zone system combines powerful zoned comfort, energy efficiency, and homeowner‑friendly installation for a versatile HVAC solution.

Features

• Zoned comfort with four independently controlled zones

• Includes indoor units: one 6,000 BTU, one 9,000 BTU, and one 12,000 BTU wall‑mounted air handlers

• DIY‑friendly installation with pre‑charged QuickConnect® line sets

• Flexible line set lengths included: 16 ft, 25 ft, and 35 ft

• R‑454B refrigerant for improved environmental performance

• Efficient, quiet operation with DC inverter technology

• Independent wireless remote controls for each indoor unit

• Smart control capable — compatible with remote app and voice assistant systems

• Corrosion‑resistant outdoor unit for long‑term reliability

• Ideal for residential multi‑room comfort needs

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

What’s Included

✔ 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.

✔ (1) MRCOOL® DIY® 16 ft QuickConnect® Line Set

• Model: DIY16-1438-O

✔ (1) MRCOOL® DIY® 25 ft QuickConnect® Line Set

• Model: DIY25-1438-O

✔ (1) MRCOOL® DIY® 35 ft QuickConnect® Line Set w/ DIYPRO® Cable

• Model: DIY35-1438C-O

✔ Wireless remotes for each air handler

✔ DIY® QuickConnect® fittings

✔ Factory-sealed refrigerant system

📱 Smart phone not included

Frequently Asked Questions (FAQ's)

Can I install this system myself?

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

Do I need special HVAC tools or refrigerant handling?

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

Can each room be controlled separately?

Yes. Each zone has independent temperature control via remote or app.

Is this system smart-home compatible?

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

Is R-454B refrigerant future-compliant?

Yes. R-454B is a next-generation refrigerant designed to meet new environmental standards.