MRCOOL® DIY® 5th Gen Multi-Zone 2-Zone 18,000 BTU 1.5 ton 24 SEER2 (6K + 6K) Air Handlers Ductless Mini-Split Air Conditioner and Heat Pump (16ft x 16ft) Pre-Charged R-454B line sets, (230V)- DIYM218HPW00D00

Product Description 

MRCOOL® DIY® 5th Gen 18,000 BTU 2-Zone Mini Split System – 23.9 SEER2 – 6K + 6K – DIYM218HPW00D00

Product Overview

The MRCOOL® DIYM218HPW00D00 is a high-efficiency 18,000 BTU 2-zone ductless mini split heat pump system designed for homeowners who want reliable year-round comfort without paying expensive professional HVAC installation costs. Powered by the advanced MRCOOL® DIY® 5th Generation Multi-Zone platform, this system combines true DIY installation, smart home technology, ultra-efficient inverter performance, and quiet operation into one complete heating and cooling solution.

This bundle includes the MRCOOL® DIY-MULTI3-18HP230D-O outdoor condenser paired with two 6,000 BTU wall-mounted air handlers, making it the perfect mini split system for smaller rooms and multi-room applications. Each indoor unit is designed to efficiently heat and cool rooms up to approximately 200 square feet, making this bundle ideal for bedrooms, offices, nurseries, guest rooms, sunrooms, workshops, additions, garages, apartments, and other small living spaces.

Unlike traditional HVAC systems that require licensed contractors, vacuum pumps, refrigerant charging, and specialty installation tools, the MRCOOL® DIY® system is engineered specifically for homeowners. The included DIY® QuickConnect® pre-charged line sets arrive factory-filled with eco-friendly R-454B refrigerant, allowing for a faster and easier installation process without vacuuming or refrigerant handling.

This bundle includes two 16-foot QuickConnect® line sets, making it ideal for installations where both indoor air handlers are located relatively close to the outdoor condenser.

With industry-leading efficiency ratings up to 23.9 SEER2 and 10 HSPF2-4, this system helps reduce monthly energy bills while delivering powerful cooling in summer, reliable heating in winter, and dehumidification during humid seasons. The inverter-driven compressor continuously adjusts output based on demand for quieter operation, better comfort, and improved efficiency compared to traditional systems.

The MRCOOL® DIY® 5th Gen system also includes built-in smart home compatibility through the MRCOOL® SmartHVAC app, Amazon Alexa, and Google Assistant. Adjust temperatures, schedules, fan modes, and settings directly from your smartphone or by voice command.

This outdoor condenser supports up to 3 indoor zones total, meaning you can expand later with an additional compatible air handler if your comfort needs grow.

If you are searching for the best DIY mini split system for small rooms, home offices, bedrooms, apartments, garages, or additions, the MRCOOL® DIYM218HPW00D00 delivers professional-level comfort with true do-it-yourself installation.

What’s Included In This Bundle

Outdoor Condenser

• MRCOOL® DIY-MULTI3-18HP230D-O
• 18,000 BTU DIY® 5th Gen Multi-Zone Condenser
• Supports up to 3 indoor zones
• 208/230V

Indoor Air Handlers

• (2) MRCOOL® DIY-06-HP-WMAH-230D25-O
• 6,000 BTU Wall Mounted Air Handlers
• Up to 200 sq. ft. coverage each

Included Installation Components

• (2) 16 ft DIY® QuickConnect® Pre-Charged Line Sets
• DIYPRO® communication cable
• Wireless remotes
• SmartHVAC WiFi/app capability
• Mounting hardware
• Installation manuals

Smartphone not included

Perfect Applications For This System

This MRCOOL® DIY® 18K dual-zone mini split system is ideal for:

• Two bedrooms
• Bedroom + office
• Guest room + nursery
• Garage + workshop
• Apartment spaces
• Sunrooms
• Tiny homes
• Additions
• Finished basements
• Home office setups
• Airbnb rentals
• Small retail or office suites

Estimated total coverage:

• Up to 400 sq. ft. combined

Why Homeowners Choose MRCOOL® DIY®

True DIY® Installation

The MRCOOL® DIY® system is specifically engineered for homeowner installation using pre-charged QuickConnect® line sets. No vacuum pump, refrigerant gauges, or refrigerant charging required.

Save Thousands On Installation Costs

Avoid expensive HVAC labor costs by installing the system yourself using basic hand tools and step-by-step instructions.

Independent Room Comfort

Each room gets its own dedicated air handler and individual temperature control for personalized comfort and improved energy efficiency.

Expandable Multi-Zone System

The outdoor condenser supports up to 3 indoor units total, allowing future expansion if additional zones are needed later.

High-Efficiency Heating & Cooling

With inverter compressor technology and up to 23.9 SEER2 efficiency, this system helps lower utility costs while maintaining stable indoor temperatures.

Built For Cold Weather

Designed for low ambient heating operation with reliable heating performance even in colder outdoor conditions.

Smart Home Ready

Compatible with:

• MRCOOL® SmartHVAC App
• Amazon Alexa
• Google Assistant
• Included wireless remotes

Eco-Friendly R-454B Refrigerant

Uses next-generation refrigerant with lower global warming potential and compliance with newer HVAC regulations.

Quiet Operation

Indoor air handlers operate quietly, making them perfect for bedrooms, offices, nurseries, and living areas.

Advanced Comfort Features

Gold Fin® Protection

Enhanced corrosion-resistant coating helps improve long-term durability, especially in humid or coastal environments.

Follow Me® Technology

Temperature sensors inside the remote help maintain more accurate comfort based on where you are in the room.

Dry Mode Dehumidification

Helps remove excess humidity while improving indoor comfort during humid conditions.

Sleep Mode

Automatically adjusts temperatures overnight for improved comfort and energy savings.

Auto Restart

Automatically restores previous settings after power outages.

Smart Diagnostics & Alerts

System provides filter reminders, maintenance notifications, and diagnostic alerts for easier upkeep.

Low Ambient Cooling

Designed to continue operating in colder outdoor temperatures.

System Specifications

System Overview

• Model Number: DIYM218HPW00D00
• System Type: Ductless Mini Split Heat Pump
• Zones Included: 2
• Zones Supported By Condenser: Up to 3
• Outdoor Condenser Capacity: 18,000 BTU
• Indoor Configuration: 6K + 6K
• Estimated Total Coverage: Up to 400 sq. ft.
• Refrigerant: R-454B
• Included Line Sets: (2) 16 ft QuickConnect® Line Sets
• Voltage: 208/230V
• Phase: 1
• Cycle: 60Hz

Outdoor Condenser Specifications

MRCOOL® DIY-MULTI3-18HP230D-O

• Cooling Capacity: 18,000 BTU
• Heating Capacity: 18,000 BTU
• SEER2: 23.9
• EER2: 13
• HSPF2-4: 10
• HSPF2-5: 7.8
• Tonnage: 1.5 Ton
• Compressor Type: Rotary DC Inverter
• Outdoor Sound Level: 60 dB(A)
• Voltage: 208/230V
• Minimum Circuit Ampacity: 16A
• Maximum Fuse Breaker: 20A
• Maximum Line Length: 172.2 ft
• Liquid Line Size: 1/4”
• Suction Line Size: 3/8”
• Energy Star Certified: Yes
• AHRI Certified: Yes
• ETL Listed: Yes
• UL Listed: Yes
• Net Dimensions: 35.04” W x 26.5” H x 13.46” D
• Net Weight: 101.63 lbs

Indoor Air Handler Specifications

MRCOOL® DIY-06-HP-WMAH-230D25-O

• Cooling Capacity: 6,000 BTU
• Heating Capacity: 6,000 BTU
• Coverage Area: Up to 200 sq. ft.
• Mount Type: Wall Mount
• Voltage: 208/230V
• Oscillation: Yes
• Filter Type: Reusable
• WiFi Compatible: Yes
• App Compatible: Yes
• Remote Included: Yes
• Net Dimensions: 31.57” W x 11.69” H x 7.44” D
• Net Weight: 24.47 lbs

Operating Modes

• Cool
• Heat
• Auto
• Fan
• Dry / Dehumidification
• Sleep
• Quiet Mode

Recommended Wire Sizing

Recommended Wire

• 12 AWG copper wire recommended for safe operation

Important Notes

• 14 AWG is generally not recommended for this application
• 10 AWG may help reduce voltage drop over longer runs

Always follow local electrical code requirements and consult a licensed electrician.

Frequently Asked Questions about MRCOOL® DIY® 5th Gen 18,000 BTU 2-Zone Mini Split System – 23.9 SEER2 – 6K + 6K – DIYM218HPW00D00

Can I install this system myself?

Yes. MRCOOL® DIY® systems are specifically designed for homeowner installation using factory-sealed QuickConnect® pre-charged line sets.

No vacuum pump, gauges, or refrigerant charging required.

A licensed electrician should complete the electrical hookup to meet local code requirements.

How many rooms can this system heat and cool?

This bundle includes 2 indoor air handlers for 2 separate rooms. The outdoor condenser supports up to 3 indoor zones total for future expansion.

What room sizes is this system best for?

Each 6K air handler is ideal for spaces up to approximately 200 sq. ft.

Actual coverage can vary depending on insulation, ceiling height, climate, windows, and room layout.

Does this system heat as well as cool?

Yes. This is a heat pump system designed for both heating and cooling year-round.

Is this system energy efficient?

Yes. With up to 23.9 SEER2 and inverter technology, this system is significantly more efficient than many traditional HVAC systems, window AC units, and electric heating systems.

Can I control the system from my phone?

Yes. The MRCOOL® SmartHVAC app allows full smartphone control and works with Amazon Alexa and Google Assistant.

Warranty Coverage

This MRCOOL® DIY® 5th Generation system includes:

• 7-Year Compressor Warranty
• 5-Year Parts Warranty
• eligible for the MRCOOL® Care Program enrollment

Why Buy From MRCOOL Direct?

MRCOOL Direct is one of America’s most trusted authorized MRCOOL dealers, specializing exclusively in MRCOOL® systems and accessories.

When you buy from MRCOOL Direct, you get:

• Genuine factory-fresh MRCOOL® equipment
• Warranty-safe authorized dealer protection
• Expert sizing assistance
• Help with line sets and accessories
• Nationwide shipping
• Friendly support before and after the sale
• Real HVAC product specialists
• Extended refrigerant, parts, and labor coverage options

Need help sizing your rooms or planning your installation?

Call MRCOOL Direct:

615-553-8118

Friendly HVAC support from real people.

BUY DIRECT AND SAVE! MRCOOL DIRECT