MRCOOL® DIY® 5th Gen 27K 2-Zone Mini Split System (9k + 12k) Multi-Zone, R-454B, (16ft + 16ft) Pre-Charged R-454B Line Sets — DIYM227HPW02D00

Product Description 

MRCOOL® DIY® 5th Gen 27,000 BTU 2-Zone Mini Split System

23 SEER2 Multi-Zone Ductless Heat Pump with 9K + 12K Air Handlers & 16ft Pre-Charged Line Sets

Model: DIYM227HPW02D00

Take complete control of your home comfort with the MRCOOL® DIY® 5th Gen Multi-Zone 27,000 BTU Ductless Mini Split Heat Pump System. Designed for true do-it-yourself installation, this 2-zone package combines the powerful DIY-MULTI4-27HP230D-O outdoor condenser with one 9,000 BTU wall-mounted air handler and one 12,000 BTU wall-mounted air handler, plus two 16 ft factory pre-charged QuickConnect® line sets for fast, professional-quality installation without specialized HVAC tools or licensing.

Perfect for homeowners wanting independent temperature control in multiple rooms, this high-efficiency MRCOOL® DIY® system delivers year-round heating and cooling while helping reduce energy costs compared to traditional central HVAC systems, window air conditioners, space heaters, or electric baseboard heat.

Unlike conventional mini split systems that require vacuum pumps, refrigerant gauges, and certified installers, the MRCOOL® DIY® 5th Gen system is engineered specifically for homeowner installation. The included patented QuickConnect® line sets arrive factory pre-charged with eco-conscious R-454B refrigerant, eliminating the need for vacuuming, charging, or refrigerant handling during installation.

With up to 23 SEER2 cooling efficiency and up to 9.5 HSPF2-4 heating performance, this multi-zone ductless heat pump system provides exceptional comfort, whisper-quiet operation, inverter-driven efficiency, and advanced humidity control for every season.

The included 9K indoor air handler is ideal for smaller spaces like bedrooms, offices, nurseries, or studios, while the 12K air handler is perfect for larger areas such as living rooms, master bedrooms, finished basements, garages, additions, or bonus rooms.

This bundle currently utilizes 2 of the condenser’s 4 available zones, allowing future expansion if you decide to add more compatible indoor units later.

Why Homeowners Choose MRCOOL® DIY® Multi-Zone Systems

• True DIY® installation with no special HVAC tools required
• Factory pre-charged QuickConnect® line sets
• No vacuum pump or refrigerant charging needed
• Independent room-by-room temperature control
• Energy-saving DC inverter technology
• SmartHVAC app compatibility for iPhone & Android
• Works with Amazon Alexa & Google Assistant
• Ultra-quiet indoor operation
• Heating and cooling from a single system
• Expandable up to 4 indoor zones
• Environmentally friendlier R-454B refrigerant
• Great for homes without existing ductwork
• Ideal for renovations, additions, garages, workshops, offices, apartments, and Airbnb properties

Ideal Applications & Recommended Room Sizes

This MRCOOL® DIY® 27K 2-Zone Mini Split System is ideal for:

• Bedrooms
• Living rooms
• Home offices
• Garages & workshops
• Finished basements
• Bonus rooms
• Apartments & condos
• Rental properties
• In-law suites
• Tiny homes & ADUs
• Studios & retail spaces
• Upstairs rooms with uneven temperatures

Included Indoor Unit Coverage

9K Wall Mount Air Handler

Recommended for spaces up to approximately 200–400 sq ft

Ideal for:

• Bedrooms
• Offices
• Nurseries
• Smaller bonus rooms

12K Wall Mount Air Handler

Recommended for spaces up to approximately 350–550 sq ft

Ideal for:

• Living rooms
• Master bedrooms
• Larger offices
• Open-concept areas

Coverage can vary depending on insulation, ceiling height, climate zone, windows, sun exposure, and room layout.

High-Efficiency Heating & Cooling Performance

The MRCOOL® DIY® 5th Gen multi-zone condenser delivers impressive year-round efficiency ratings that help reduce monthly utility bills while maintaining powerful comfort.

Performance Ratings

• Up to 23 SEER2
• Up to 12 EER2
• Up to 9.5 HSPF2-4
• Variable-speed DC inverter compressor
• Heat pump operation for all-season comfort
• Advanced dehumidification Dry Mode
• Sleep Mode & Eco functions
• Auto Restart after power outages

This system is significantly more efficient than:

• Window air conditioners
• Portable AC units
• Electric baseboard heaters
• Older central HVAC systems
• Traditional resistance heating

Smart Control Features

Control your comfort from virtually anywhere using:

• Included wireless remotes
• SmartHVAC app
• Amazon Alexa
• Google Assistant

Adjust:

• Temperature
• Fan speed
• Operating mode
• Sleep settings
• Scheduling
• Energy-saving modes

All directly from your smartphone or voice assistant.

Outdoor Condenser Specifications

DIY-MULTI4-27HP230D-O

System Capacity

• Cooling Capacity: 26,000 BTU
• Heating Capacity: 26,000 BTU
• System Class: 27K
• Tonnage: 2.25 Ton

Electrical

• Voltage: 208/230V
• Phase: 1-Phase
• Frequency: 60Hz
• Minimum Circuit Ampacity: 23A
• Maximum Fuse/Breaker Size: 25A

Efficiency

• Up to 23 SEER2
• 12 EER2
• 9.5 HSPF2-4
• 7 HSPF2-5

Refrigerant & Compressor

• Refrigerant Type: R-454B
• Compressor Type: DC Inverter Rotary

Sound & Dimensions

• Outdoor Sound Level: 61 dBA
• Net Dimensions: 37.24” W × 31.89” H × 16.14” D
• Net Weight: 140.21 lbs

Line Set Information

• Liquid Line Size: 1/4”
• Suction Line Size: 3/8”
• Maximum Total Line Length: 221.4 ft

9K Wall Mount Air Handler Specifications

DIY-09-HP-WMAH-230D25-O

• Cooling Capacity: 9,000 BTU
• Recommended Coverage: Up to 400 sq ft
• Voltage: 208/230V
• Mount Type: Wall Mounted
• Smart Control Compatible
• Reusable Air Filter
• Modes: Cool, Heat, Auto, Dry, Fan, Sleep
• Net Dimensions: 31.57” W × 11.69” H × 7.44” D
• Net Weight: 24.47 lbs

12K Wall Mount Air Handler Specifications

DIY-12-HP-WMAH-230D25-O

• Cooling Capacity: 12,000 BTU
• Recommended Coverage: Up to 550 sq ft
• Voltage: 208/230V
• Sound Level: 19–54.5 dBA
• Smart Control Compatible
• Reusable Air Filter
• Modes: Cool, Heat, Auto, Dry, Fan, Sleep
• Liquid Line Size: 1/4”
• Suction Line Size: 1/2”
• Net Dimensions: 31.57” W × 11.63” H × 7.44” D
• Net Weight: 24.47 lbs

Included DIY® QuickConnect® Line Sets

(2) DIY16-1438-O

This bundle includes two factory pre-charged MRCOOL® DIY® QuickConnect® line sets for simplified installation.

Specifications

• Quantity Included: 2
• Length: 16 ft each
• Line Size: 1/4” × 3/8”
• Refrigerant: R-454B
• Pre-Charged: Yes
• QuickConnect® Fittings Included
• No Vacuuming Required
• Compatible with MRCOOL® DIY® Indoor Units

What’s Included in This Bundle

• (1) MRCOOL® DIY® 27K Multi-Zone Condenser
  Model: DIY-MULTI4-27HP230D-O
• (1) 9K Wall Mount Air Handler
  Model: DIY-09-HP-WMAH-230D25-O
• (1) 12K Wall Mount Air Handler
  Model: DIY-12-HP-WMAH-230D25-O
• (2) 16 ft Pre-Charged QuickConnect® Line Sets
  Model: DIY16-1438-O
• DIYPRO® Communication Wire
• Wireless Remote Controls
• SmartHVAC WiFi Connectivity
• Installation Hardware
• Installation Manuals

Warranty Information

MRCOOL® DIY® 5th Gen systems include strong manufacturer warranty protection for added peace of mind.

Standard Warranty Coverage

• 5 Year Parts Warranty
• 7 Year Compressor Warranty
• Eligible for the care kit program              

Frequently Asked Questions

Do I need an HVAC license to install this system?

No. The MRCOOL® DIY® system is specifically designed for homeowner installation using basic hand tools. The included QuickConnect® line sets come factory pre-charged and sealed, eliminating the need for vacuum pumps or refrigerant handling.

How many rooms can this system heat and cool?

This package is configured for 2 rooms or zones using one 9K indoor unit and one 12K indoor unit. However, the included condenser supports up to 4 indoor units total, allowing future expansion.

What size rooms is this system best for?

The 9K indoor unit is ideal for rooms up to approximately 200–400 sq ft.

The 12K indoor unit is ideal for larger spaces up to approximately 350–550 sq ft.

Actual sizing needs may vary depending on insulation, windows, ceiling height, climate, and room layout.

Are the included line sets really pre-charged?

Yes. Both included 16 ft QuickConnect® line sets arrive factory pre-charged with R-454B refrigerant for fast DIY installation.

Is this system energy efficient?

Absolutely. With efficiency ratings up to 23 SEER2 and 9.5 HSPF2-4, this MRCOOL® DIY® multi-zone system is far more efficient than most traditional heating and cooling options.

Can I control the system from my phone?

Yes. Use the SmartHVAC app on iPhone or Android devices to control temperatures, modes, schedules, and settings remotely. The system also supports Amazon Alexa and Google Assistant voice control.

Can I add more indoor units later?

Yes. This condenser supports up to 4 total indoor zones. Since this bundle only uses 2 zones, additional compatible indoor units can be added later if desired.

Why Buy From MRCOOL DIRECT

MRCOOL DIRECT specializes exclusively in MRCOOL® products and systems.

Why customers choose us:

• Expert MRCOOL® product knowledge
• Help with system sizing & layout
• Factory-fresh equipment
• Nationwide shipping
• Friendly pre-sale & post-sale support
• Assistance with accessories & line set options
• Dedicated customer service

Need help choosing the right system?

Call 615-553-8118 for assistance with:

• Room sizing
• Breaker sizing
• Line set lengths
• Multi-zone layouts
• Installation questions

BUY DIRECT & SAVE!