MRCOOL DIY Select 12,000 BTU Single Zone Mini Split System 115V with 11.5 ft. DIY Quick Connect Line Set - DIYS-12-HP-115A11-O

Overview

Condenser

The MRCOOL® DIY® Select 12K BTU 115V Ductless Heat Pump Single Zone Mini-Split Condenser is designed to make HVAC installation simple and accessible for homeowners. Built for true do-it-yourself installation, it requires no specialized tools, certifications, or prior HVAC experience. Ideal for garages, home offices, studios, and similar spaces, it delivers reliable heating and cooling for areas up to 550 square feet. Despite its DIY®-friendly design, the system delivers strong performance with a 17.5 SEER2 cooling rating and 9 HSPF2-4 heating efficiency, providing consistent, energy-efficient comfort year-round while helping control utility costs. Installation is further simplified with an 11.5-foot Quick Connect® line set that arrives factory pre-charged with environmentally friendly R-454B refrigerant, eliminating the need for vacuum pumps or refrigerant handling. Most components are included, making setup faster and more approachable for first-time installers. Comfort control is easy using the included wireless remote or the MRCOOL® Comfort app, which allows remote temperature control, scheduling, and energy monitoring. Compatibility with Amazon Alexa and Google Assistant adds hands-free convenience. Features like Sleep Mode, Dry Mode, Auto, and a Gold Fin® condenser coating enhance comfort and durability, even in humid or coastal environments. MRCOOL® offers enhanced peace of mind with their 2-year compressor warranty and 1-year parts warranty for homeowners.

Air Handler

The MRCOOL® DIY® Select 12K BTU 115V Ductless Mini-Split Heat Pump Air Handler delivers efficient, reliable heating and cooling for spaces up to 550 square feet. Ideal for attics, garages, home offices, and similar-sized rooms, this system provides consistent year-round comfort while helping lower energy use and utility costs. As part of the MRCOOL® DIY® lineup, this unit is engineered for true do-it-yourself installation. The compatible Quick Connect® line set arrives factory pre-charged with environmentally friendly R-454B, eliminating the need for vacuum pumps or refrigerant handling. In addition, the 13-foot DIYPRO® cable removes the need for traditional electrical conduit, simplifying installation while protecting wiring from moisture, pests, and everyday wear. Comfort control is easy and flexible with the included wireless remote or the MRCOOL® Comfort app, which lets you adjust temperatures, create schedules, and monitor energy usage from anywhere. Voice-control compatibility with Amazon Alexa and Google Assistant adds hands-free convenience. Advanced features like Dry Mode, Sleep Mode, Auto Mode, and programmable scheduling enhance comfort while improving efficiency. A Gold Fin® condenser coating provides added corrosion resistance for long-term durability, even in humid or coastal environments. The MRCOOL® DIY® Select 12K includes a 2-year compressor warranty and 1-year parts warranty.

Specifications

Condenser Specifications

Air Handler Specifications

Installation & Guides

BROCHURE

INSTALL MANUAL

REMOTE MANUAL

SERVICE MANUAL

WARRANTY DOC

AHRI CERTS

ENERGY GUIDE CERTS

Whats Included in the Box

12,000 BTU Indoor Air Handler

12,000 BTU Outdoor Condenser

11.5 ft Quick Connect® line set

13-foot DIYPRO® cable

WiFi Smart Controller (built-in)

Remote

User Manual & Warranty Documentation