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

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

The MRCOOL DIY® 5th Gen 27,000 BTU 4‑Zone Ductless Mini Split Heat Pump System (DIYM327HPW02D21) is a powerful, multi‑room heating and cooling solution that brings zoned comfort to your home or workspace with easy DIY installation. Designed for areas where personalized climate control is essential, this setup combines a 27,000 BTU outdoor condenser with four indoor wall‑mounted air handlers — two sized at 6,000 BTU and two at 12,000 BTU — delivering customized comfort throughout multiple living spaces.

This system is built for homeowner installation. The included pre‑charged QuickConnect® line sets eliminate the need for vacuum pumps or professional refrigerant handling, dramatically simplifying setup while reducing installation time and cost. With all line sets pre‑sealed and pre‑charged with R‑454B refrigerant, you can complete the installation using basic tools and standard household supplies.

Each indoor unit can be independently controlled with its own wireless remote, giving every zone its own temperature setting. Thanks to advanced DC inverter technology, the system maintains consistent and efficient performance with quiet operation. Smart control capabilities add modern convenience, enabling remote adjustments and integration with voice assistants and smart home platforms.

Engineered for long‑term durability, the outdoor condenser features corrosion‑resistant components to help withstand various environmental conditions. Backed by strong manufacturer warranty coverage, this multi‑zone system offers versatility, performance, and installation ease for homeowners looking to upgrade and customize their indoor comfort.

Features

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

• Balanced Capacity: Includes two 6,000 BTU and two 12,000 BTU wall‑mounted air handlers

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

• Uses R‑454B Refrigerant for reduced environmental impact

• Quiet, efficient DC inverter technology

• Wireless remote controls included for each indoor unit

• Smart control capable — ready for remote app and voice assistant integration

• Corrosion‑resistant outdoor unit design for long‑term operation

• Ideal for residential and light commercial multi‑room HVAC needs

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 | Inverter Heat Pump

• Max Breaker: 35A | Min Circuit Ampacity: 30.5A

✔ (2) MRCOOL® DIY® 6K BTU Wall-Mounted Air Handlers

• Model: DIY-06-HP-WMAH-230D25-O

• Up to 200 sq. ft. per zone

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

• Model: DIY-12-HP-WMAH-230D25-O

• 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

Frequently Asked Questions (FAQ's)

Can I really install this myself?

Yes. MRCOOL® DIY® systems are specifically designed for homeowners using QuickConnect® technology.

Do I need special tools or refrigerant handling?

No. The system is factory-sealed and pre-charged.

Can each room be controlled independently?

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

Is this system compatible with smart devices?

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

Is this system efficient for long-term use?

Absolutely. Inverter technology and R-454B refrigerant maximize efficiency and reduce energy costs.