MRCOOL DIY 5th Gen 18,000 BTU 2-Zone Ductless Mini Split Air Conditioner & Heat Pump with (25 ft + 25 ft) Pre-Charged Line Sets (6K + 12K) DIYM218HPW02D06

MRCOOL DIY 5th Gen 18,000 BTU 2-Zone Ductless Mini Split Air Conditioner & Heat Pump with (25 ft + 25 ft) Pre-Charged Line Sets (6K + 12K) DIYM218HPW02D06

Take control of your home comfort with the MRCOOL DIY 5th Gen 18,000 BTU Multi-Zone Ductless Mini Split System — the easiest and most cost-effective way to heat and cool two separate rooms without professional HVAC installation. Designed for homeowners, this innovative system lets you install the indoor and outdoor units yourself using the included pre-charged Quick-Connect® line sets — no refrigerant handling or vacuuming required.

Whether you’re combating summer heat or winter chills, this versatile system delivers efficient performance year-round. Enjoy up to 23.9 SEER2 cooling efficiency and a 10 HSPF2-4 heating rating, helping reduce energy bills while maintaining consistent comfort. Built to perform even in cold conditions, it provides reliable heat down to -13 °F.

This model is perfect for two spaces, offering independent temperature control in rooms up to approximately 200 sq ft and 550 sq ft, respectively. Backed by strong warranty protection — including a 7-year compressor replacement and 5-year parts coverage — you can trust long-lasting performance from a system certified for safety and quality.

With durable DIYPRO® armored cable included and compatibility for additional indoor air handlers (up to three total), the MRCOOL DIY system is a flexible, high-efficiency solution for custom comfort.

Features

• 5th Generation DIY Technology: Allows homeowner installation without specialized HVAC tools or refrigerant handling.

• Pre-Charged Quick-Connect® Line Sets: Includes two 25 ft pre-charged linesets for easy setup.

• Year-Round Comfort: Energy-efficient cooling and heating with excellent performance at low outdoor temperatures.

• Warranty Protection: 7-year compressor replacement and 5-year parts coverage (extended limited lifetime replacement with registration).

• Certified Quality: Intertek safety and performance listing.

• Expandable System: Outdoor condenser supports up to three compatible indoor air handlers.

• DIYPRO® Cable Included: Durable armored cable reduces need for electrical conduit.

Specifications

What's Included

• 1 18k BTU Condenser 

• 1 6K BTU Air Handler

• 1 12K BTU Air Handler

• 2 x 25ft  DIY® Quick Connect® Pre-Charged Line Sets

Frequently Asked Questions (FAQ's)

What's the difference between the 5th Gen and 4th Gen?

The 5th Gen MRCOOL® DIY® Mini Split offers several key upgrades over the 4th Gen, focusing on efficiency, advanced technology, and eco-friendliness.

Here’s what’s new with the 5th Gen:

• Next-Gen R-454B Refrigerant: A more environmentally friendly refrigerant with lower global warming potential (GWP), compliant with the latest HVAC regulations.
• Higher Energy Efficiency: Improved SEER2 ratings for greater energy savings and optimized performance.
• Enhanced System Reliability: Upgraded components for better heating and cooling performance.
  

Can I install it myself, or do I need a professional?

The MRCOOL® DIY system is designed for homeowners and doesn’t require HVAC tools. You can install the indoor and outdoor units yourself using the pre-charged Quick Connect® lines. However, a licensed electrician is required for the electrical hookup to ensure safety and code compliance.

Does it work in cold weather?

Yes. MRCOOL® 5th Gen systems feature low-ambient heating and can provide reliable heat even when outdoor temperatures drop to around 5°F.

How do I know what BTU size I need for my rooms?

A general rule of thumb is 20 BTU per square foot of space. Here's a rough guide:

• 6,000 BTU = 100 - 200sq ft
• 9,000 BTU = 150 - 400sq ft
• 12,000 BTU = 351- 550 sq ft
• 18,000 BTU = 501 – 800 sq ft
• 24,000 BTU = 751 – 1,050 sq ft
• 36,000 BTU = 1,001 - 1,550 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

Does it heat as well as cool?
Yes. All 5th Gen models are heat pumps, providing both heating and cooling for year-round comfort.

Is it Wi-Fi compatible?

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

What is the warranty?

The MRCOOL® 5th Generation DIY Mini-Split systems offer the following warranty coverage:

• 7-Year Compressor Replacement Warranty: This warranty ensures that if the compressor fails within the first seven years, MRCOOL® will provide a replacement.
• 5-Year Parts Warranty: This warranty covers all parts of the system for five years from the date of purchase.

Note: Always verify system configuration before purchasing. Specifications may change during production. Images may be representative only.