MRCOOL DIY 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (6K + 12K + 6K Air Handlers)

MRCOOL DIY 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (6K + 12K + 6K Air Handlers)

The MRCOOL DIY 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System delivers zoned comfort and energy‑efficient climate control throughout multiple areas of your home or workspace. This system is engineered with a 5th Generation multi‑zone condenser and matched with four indoor wall‑mounted air handlers — two 6,000 BTU and two 12,000 BTU units — to provide balanced heating and cooling across a range of spaces such as bedrooms, living rooms, offices, and bonus rooms. Thanks to its multi‑zone design, each area can be set independently for personalized comfort.

Installation is made simple with MRCOOL’s QuickConnect® design: the included line sets are factory‑sealed and pre‑charged with R‑454B refrigerant, eliminating the need for vacuum pumps, refrigerant gauges, or licensed HVAC professionals. The system also includes a DIYPRO® communication cable that simplifies electrical connections. With advanced DC inverter technology, the system operates quietly and efficiently, delivering consistent performance while helping lower energy bills.

Each indoor unit is controlled independently, allowing precise temperature management in every zone. The system is also designed to be smart‑home compatible, offering remote control capabilities and integration with modern home automation tools. Durable construction, including corrosion‑resistant components, ensures reliable long‑term operation in a variety of conditions.

Backed by manufacturer warranty coverage, this MRCOOL DIY® multi‑zone mini split system brings powerful performance, zoned comfort, and true DIY installation convenience to homes seeking versatile HVAC solutions.

Features

• Multi‑Zone Comfort: Four independently controlled zones for personalized heating/cooling

• Mixed Air Handler Setup: Includes two 6,000 BTU and two 12,000 BTU wall‑mounted indoor units

• DIY‑Friendly Installation: Pre‑charged QuickConnect® line sets eliminate vacuuming and refrigerant handling

• R‑454B Refrigerant: Environmentally improved refrigerant for reduced impact

• Quiet & Efficient Operation: DC inverter technology supports balanced and quiet performance

• Smart Control Capable: Designed for remote app control and smart‑home integration

• Wireless Remotes: Included for easy temperature adjustments in each zone

• Corrosion‑Resistant Design: Outdoor unit built for durability

• Flexible Comfort: Independent zone thermostats for tailored temperature control

• Applications: Suitable for residential or light commercial multi‑room HVAC needs

Specifications

• Total System Capacity: 27,000 BTU
• Zones Installed: 3 (Supports up to 4 zones)
• SEER2: Up to 23
• HSPF2-4: Up to 9.9
• Refrigerant: R-454B
• Voltage: 208/230V (Single Phase)
• Max Breaker (Condenser): 25A
• Minimum Circuit Ampacity: 21A
• Inverter-Driven Compressor: Yes
• ENERGY STAR® Certified: Yes
• AHRI Certified: Yes

What’s Included

✔ MRCOOL® DIY-MULTI4-27HP230D-O
27,000 BTU 4-Zone 5th Gen DIY® Multi-Zone Condenser (230V)

✔ (2) MRCOOL® DIY-06-HP-WMAH-230D25-O
6,000 BTU Wall-Mounted Air Handlers (up to ~200 sq ft each)

✔ (1) MRCOOL® DIY-12-HP-WMAH-230D25-O
12,000 BTU Wall-Mounted Air Handler (up to ~550 sq ft)

✔ (3) MRCOOL® DIY16-1438-O
16 ft DIY® QuickConnect® Line Sets (1/4” x 3/8”)

✔ DIYPRO® communication cable

✔ Wireless remotes for each indoor unit

✔ Wall mounting hardware & installation accessories 

📌 Smart phone not included

Frequently Asked Questions (FAQ's)

Q: Can I add another indoor unit later?

Yes. The condenser supports up to four indoor air handlers.

Q: Do I need HVAC tools or a license?

No. DIY® QuickConnect® technology eliminates vacuuming and refrigerant handling.

Q: Can each room be controlled independently?

Yes. Each zone is controlled separately using the MRCOOL® Smart HVAC Controller®.

Q: What warranty comes with this system?

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