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 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 QuickConnect Line Sets)

The MRCOOL DIY® 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (DIYM327HPW04D06) delivers efficient zoned heating and cooling for multiple areas of your living space, all with true DIY installation convenience. This complete system pairs a 27,000 BTU outdoor condenser with three indoor wall‑mounted air handlers — a 6,000 BTU, a 9,000 BTU, and a 12,000 BTU unit — allowing independent climate control in up to four zones. It’s ideal for homes, offices, bonus rooms, and other multi‑room applications where personalized comfort and efficiency are essential.

Installation is streamlined for homeowners with MRCOOL’s QuickConnect® technology. The included line sets are factory‑sealed and pre‑charged with R‑454B refrigerant, eliminating the need for vacuum pumps, refrigerant gauges, or professional HVAC tools. With a combination of 16 ft and two 25 ft line sets included, you have flexibility in unit placement to suit your unique room layout. A DIYPRO® communication cable simplifies wiring connections, making this system accessible to install with basic tools.

Each indoor unit offers independent control with its own wireless remote, allowing customized temperature settings in every zone. The system’s advanced DC inverter compressor maintains balanced and efficient performance with whisper‑quiet operation throughout the year. Smart control compatibility adds convenience with remote temperature adjustments via app or voice assistant systems.

Built for long‑lasting durability, the outdoor condenser features corrosion‑resistant construction designed to withstand a variety of weather conditions. Backed by robust manufacturer warranty coverage, this MRCOOL DIY® multi‑zone system combines performance, flexibility, and user‑friendly installation for reliable year‑round comfort.

Features

• Multi‑Zone Comfort: Four independently controlled zones for personalized climate control

• Indoor Units Included: One 6,000 BTU, one 9,000 BTU, and one 12,000 BTU wall‑mounted air handler

• DIY‑Friendly Installation: Pre‑charged QuickConnect® line sets eliminate vacuuming and professional tools

• Flexible Line Sets: Includes one 16 ft and two 25 ft pre‑charged QuickConnect® line sets for versatile placement

• Eco‑Friendly Refrigerant: Uses R‑454B refrigerant for improved environmental performance

• Quiet and Efficient: DC inverter variable‑speed compressor technology for energy savings and reduced noise

• Independent Controls: Wireless remote controls included for each indoor unit

• Smart Control Ready: Compatible with remote app and voice assistant systems

• Durable Construction: Corrosion‑resistant outdoor unit designed for long‑term use

• Applications: Ideal for residential or light commercial multi‑room HVAC comfort

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

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

• Model: DIY25-1438-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 engineered 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 air handler has its own remote, thermostat, and app control.

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 is more efficient and environmentally responsible than older refrigerants.