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

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

The MRCOOL DIY® 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System is a flexible and high‑performance HVAC system designed to deliver personalized comfort across multiple rooms without the need for professional installation. This 4‑zone system combines a 27,000 BTU outdoor condenser with three indoor air handlers — one 6,000 BTU and two 9,000 BTU units — offering balanced climate control tailored to each zone in your home, workspace, or living area.

Engineered for true DIY installation, the system includes pre‑charged QuickConnect® line sets that remove the need for vacuum pumps, refrigerant gauges, or specialized HVAC tools. The included line sets are ready to connect, which dramatically simplifies setup and reduces installation time. With the homeowner in mind, this setup allows you to complete the project using basic tools and standard electrical supplies.

Each indoor unit comes with its own wireless remote control, enabling independent temperature management for different rooms or areas. Powered by advanced DC inverter technology, the system maintains efficient, whisper‑quiet operation throughout the year — providing dependable cooling in summer and effective heating in winter. Smart control support adds another layer of convenience, enabling remote management and smart‑home integration.

Built for long‑lasting performance, the outdoor condenser is constructed with durable, corrosion‑resistant components designed to withstand various weather conditions. Backed by manufacturer warranties on compressor and parts, this 27K multi‑zone mini split system combines powerful zoned performance with DIY‑ready convenience and modern reliability.

Features

• Multi‑zone comfort with four independently controlled zones

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

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

• Uses environmentally improved R‑454B refrigerant

• Quiet and efficient DC inverter compressor technology

• Wireless remote controls included for each indoor unit

• Smart control capable — compatible with remote app and voice assistance

• Durable, corrosion‑resistant outdoor design

• Designed for residential and light commercial multi‑room climate control

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

What’s Included

✔ 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® 16 ft QuickConnect® Line Sets

• Model: DIY16-1438-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 

Frequently Asked Questions (FAQ's)

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 come pre-charged and sealed from the factory.

Can each room be controlled independently?

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

Does it work with smart home systems?

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

Is this system energy efficient?

Absolutely. DC inverter technology and R-454B refrigerant help reduce energy consumption and operating costs.