MRCOOL DIY 5th Gen 2‑Zone 18,000 BTU Ductless Mini Split Heat Pump System with (16 ft + 25 ft) Pre‑Charged Line Sets (9K + 9K)

MRCOOL DIY 5th Gen 2‑Zone 18,000 BTU Ductless Mini Split Heat Pump System with (16 ft + 25 ft) Pre‑Charged Line Sets (9K + 9K)

Experience customized comfort for two separate spaces with the MRCOOL DIY 5th Gen 2‑Zone 18,000 BTU Ductless Mini Split Heat Pump System. Designed for heating and cooling efficiency, this advanced multi‑zone system delivers powerful performance and energy savings, perfect for homes, offices, or additions up to approximately 800 sq. ft. With two 9,000 BTU air handlers and a robust 18,000 BTU outdoor unit, you get precise temperature control in each zone.

True DIY ease of installation sets this system apart — pre‑charged Quick‑Connect® line sets (16 ft and 25 ft included) make setup fast and straightforward, requiring no professional HVAC tools or refrigerant handling. Enjoy smart controls through the MRCOOL Smart Controller app or voice devices (Amazon Alexa/Google Home), plus wireless remotes included for each indoor unit.

Built for long‑lasting reliability, the outdoor unit features a Gold Fin® condenser for corrosion resistance in harsh weather, and advanced inverter technology yields up to 23.9 SEER2 efficiency to help keep utility costs low. The system also includes self‑diagnostics, quiet operation modes, and auto restart for convenience after power outages.

Whether you’re upgrading comfort or adding climate control to new spaces, this MRCOOL DIY system offers flexibility, durability, and modern features without professional installation hassles.

Features

• Designed for two independent zones with 9,000 BTU air handlers each for personalized comfort.

• DIY‑friendly installation with pre‑charged Quick‑Connect® line sets (16 ft & 25 ft included).

• Smart control integration via app, Amazon Alexa, Google Home, and wireless remotes.

• Gold Fin® condenser for enhanced durability and corrosion resistance.

• High efficiency with 23.9 SEER2, energy‑saving inverter performance.

• Low ambient cooling capabilities for extended seasonal use.

• Quiet comfort with sleep mode and mute mode options.

• Auto restart after power interruptions.

Specifications

What's Included

• 1 18k BTU Condenser 

• 2 9k BTU Air Handler

• 1 16ft  DIY® Quick Connect® Pre-Charged Line Sets

• 1 25ft DIY® Quick Connect® Pre-Charged Line Sets

DIYPRO® Cable: Durable armored cable eliminates the need for electrical conduit

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.