MRCOOL DIY Select Mini Split | R‑454B | High‑Efficiency Heating & Cooling

Price range: $1,249.00 through $1,899.00

The MRCOOL DIY Select Series is a high‑efficiency ductless mini‑split system designed for true do‑it‑yourself installation. With SEER2 ratings from 16.5–17.5, eco‑friendly R‑454B refrigerant, and pre‑charged Quick Connect® line sets, DIY Select units deliver reliable heating and cooling without specialized tools or HVAC experience. Perfect for bedrooms, offices, garages, and bonus rooms, this system provides year‑round comfort with smart app control, voice compatibility, and durable Gold Fin® protection.

Estimated delivery dates: Aug 21, 2026 - Aug 26, 2026

Description

The MRCOOL DIY Select Series delivers professional‑quality heating and cooling performance in a true do‑it‑yourself package. Every system in the DIY Select line is engineered for fast, clean installation without specialized tools, vacuum pumps, or prior HVAC experience. Designed for bedrooms, offices, garages, bonus rooms, and small apartments, these systems provide reliable comfort across a wide range of room sizes.

DIY Select condensers feature high‑efficiency performance with SEER2 ratings ranging from 16.5 to 17.5, depending on the system size. This ensures dependable cooling, strong heating output, and reduced energy consumption throughout the year. Each unit arrives with a factory‑charged Quick Connect® line set filled with eco‑friendly R‑454B refrigerant, eliminating the need for refrigerant handling or vacuum procedures.

Comfort control is simple using the included wireless remote or the MRCOOL Comfort app, offering scheduling, temperature adjustments, and energy monitoring from anywhere. Voice compatibility with Amazon Alexa and Google Assistant adds hands‑free convenience. Indoor features such as Sleep Mode, Dry Mode, Auto, and programmable scheduling help maintain ideal comfort, while the Gold Fin corrosion‑resistant coating protects the outdoor condenser in humid or coastal environments.

Backed by a 2‑year compressor warranty and 1‑year parts warranty, the DIY Select Series provides long‑term reliability and peace of mind for homeowners seeking an efficient, easy‑to‑install heating and cooling solution.

 

  • True DIY installation — no vacuum pump or HVAC tools
  • High‑efficiency performance: 16.5–17.5 SEER2
  • Eco‑friendly R‑454B refrigerant
  • Pre‑charged Quick Connect® line sets
  • Smart control via MRCOOL® Comfort app
  • Alexa & Google Assistant compatible
  • Gold Fin® corrosion‑resistant condenser
  • Multiple BTU sizes available
  • Ideal for bedrooms, offices, garages, bonus rooms

Additional information

Other
MRCOOL DIY Select Mini Split

9K BTU 115V, 12K BTU 115V, 18K BTU 230V, 24K BTU 230V

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FAQs

What makes the DIY Select Series a true DIY system?
The DIY Select Series uses pre‑charged Quick Connect® line sets filled with R‑454B refrigerant, allowing installation without a vacuum pump or specialized HVAC tools. This lets homeowners complete a professional‑grade install with basic tools.
What refrigerant does the DIY Select Series use?
All DIY Select systems use R‑454B, an eco‑friendly, low‑GWP refrigerant designed to meet modern environmental standards.

What sizes are available in the DIY Select Series?
The series includes 9K BTU (115V), 12K BTU (115V), 18K BTU (230V), and 24K BTU (230V) single‑zone systems.

What SEER2 efficiency ratings do these units offer?
Depending on the model, DIY Select systems deliver SEER2 performance up to 17.5, providing high‑efficiency heating and cooling for a wide range of room sizes.

Do these systems support smart controls?
Yes. Every DIY Select unit works with the MRCOOL® Comfort app, offering scheduling, remote control, and integration with Alexa and Google Assistant.

What indoor comfort modes are included?
Units include Sleep, Dry, Auto, and standard heating/cooling modes for year‑round comfort.

Are DIY Select condensers protected against corrosion?
Yes. The outdoor condenser features Gold Fin® coating, which helps resist corrosion—especially useful in humid or coastal environments.

What rooms or spaces are these systems best for?
  • 9K: bedrooms, offices, small rooms
  • 12K: medium rooms, living spaces
  • 18K: large rooms, workshops, open areas
  • 24K: very large rooms, open‑concept spaces, multi‑purpose areas
Do I need professional help to install it?
Most homeowners can install the DIY Select system themselves thanks to the Quick Connect® line sets. However, professional help is optional if you prefer assistance with mounting or electrical work.

Are the line sets included?
Yes. Each system includes a factory‑charged Quick Connect® line set designed specifically for DIY installation.

Specifications

  • Refrigerant: R‑454B

  • Line Set Type: Pre‑charged Quick Connect®

  • System Type: Single Zone Ductless Heat Pump

  • Voltage: 115V or 230V (depending on size)

  • Efficiency Range: 16.5–17.5 SEER2

  • Heating Efficiency: High HSPF2 performance

  • Control Options: Remote + MRCOOL® Comfort App

  • Voice Control: Alexa + Google Assistant

  • Outdoor Protection: Gold Fin® coating

Installation

  • No vacuum pump required

  • No refrigerant handling

  • Pre‑charged Quick Connect® line sets

  • Basic tools only

  • Step‑by‑step DIY process

  • Wall template included

  • Electrical requirements vary by size (115V or 230V)

 

Warranty

  • 2‑year compressor warranty

  • 1‑year parts warranty

  • MRCOOL® support resources

  • Registration recommended

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