• MRCOOL DIY 12K BTU Mini Split System | Single Zone | Up to 550 Sq Ft image 1
  • MRCOOL DIY 12K BTU Mini Split System | Single Zone | Up to 550 Sq Ft image 2
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🏠 COVERS Up to 550 Sq Ft

MRCOOL

MRCOOL DIY [5th Gen] 12K BTU Heat Pump Mini Split | [115V] | Up to 550 Sq Ft

MRCOOL DIY [5th Gen] 12K BTU Heat Pump Mini Split | [115V] | Up to 550 Sq Ft

Quick Facts

Coverage Area Up to 550 Sq Ft
Cooling Capacity 12000 BTU
Heating Capacity 12000 BTU
SEER Rating 23.5
Voltage 115
$2,254.80 USD
$2,359.00 USD $2,254.80 USD
Sale Sold out
Taxes included. Free shipping on all products.
Electrical requirements: This system runs on 115V and needs a dedicated circuit. Have your panel capacity checked and confirm local code and permit requirements before ordering.
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✓Free shipping on all products
✓Manufacturer Warranty Included
✓Secure Checkout
✓U.S.-Based Customer Support — info@a1homeessentials.com

Need Help Choosing The Right Size?

Find the perfect MRCOOL DIY® system for your space in under 30 seconds.

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Complete your install

Wall mounting brackets, LineGuard line set cover kits, and extra-length Quick Connect® line sets.

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Complete Installation Package

Everything required for installation and operation is included with your MRCOOL DIY® System.

✓
Indoor Air Handler Delivers efficient heating and cooling.
✓
Outdoor Condenser High-performance outdoor unit.
✓
Quick Connect® Line Set Pre-charged for DIY installation.
✓
DIYPRO® Armored Cable Additional protection and durability.
✓
Wireless Remote Control comfort from anywhere in the room.
✓
SmartHVAC App Control Manage your system from your phone.

Comfort Without Compromise

Enjoy your space year-round with efficient heating and cooling perfectly designed for you.


The MRCOOL DIY® system delivers professional-grade comfort without the cost or complexity of traditional installations.

Find Your Perfect System

Why Homeowners Choose MRCOOL DIY®

  • DIY Installation

    Install your system yourself using the included pre-charged Quick Connect® line set and save on professional installation costs.

  • Lower Installation Costs

    Avoid expensive contractor labor while enjoying the same comfort and performance as professionally installed systems.

  • Control From Anywhere

    Adjust temperature settings remotely using the SmartHVAC app or compatible voice assistant devices.

  • High-Efficiency Performance

    Designed to deliver powerful heating and cooling while helping reduce energy consumption throughout the year.

Coverage Area & BTU Quick Facts

Find the recommended MRCOOL DIY® system size for your space.

9K
Up to 400 sq ft
  • Bedrooms
  • Home Offices
  • Studios
12K
Up to 550 sq ft
  • Bedrooms
  • Offices
  • Bonus Rooms
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MOST POPULAR
18K
Up to 800 sq ft
  • Garages
  • Workshops
  • Basements
24K
Up to 1,050 sq ft
  • Large Garages
  • Game Rooms
  • Open Spaces
36K
Up to 1,550 sq ft
  • Workshops
  • Open Layouts
  • Large Spaces

Coverage is a maximum for typical insulation and ceiling height. Hot climates, poor insulation, high ceilings, or sun-exposed rooms may need a larger size. Use our sizing tool for a personalized recommendation.

Answers to the most common questions about MRCOOL DIY® systems, installation, sizing, and operation.

Frequently Asked Questions

How do I determine the right BTU size?

Use our MRCOOL DIY® sizing tool to get a recommendation based on room size, insulation level, and how the space is used. The Coverage Area cards above show the maximum square footage for each size.

Can I really install a MRCOOL DIY® system myself?

Yes. MRCOOL DIY® systems are designed for homeowner installation. The pre-charged Quick Connect® line set means no vacuum pump, refrigerant charging, or specialized HVAC tools. The one step to plan for is the electrical supply — see the electrical question below.

What electrical work is required, and do I need a permit?

Mini splits typically need a dedicated circuit with a breaker and disconnect sized for the system’s voltage (see Voltage under Quick Facts). Requirements for wiring a new circuit and for permits or inspections vary by city and county. Many homeowners hire a licensed electrician for the electrical hookup even though the rest of the installation is DIY. Review the installation manual and confirm local requirements before you order.

Do I need an HVAC technician?

A licensed HVAC technician is not required for the refrigerant side — the pre-charged Quick Connect® line set is designed to be connected without vacuuming or charging. Electrical work and permits are governed by your local code, so check what applies to you (see below).

What is included, and what do I need to buy separately?

The system includes the indoor air handler, outdoor condenser, pre-charged Quick Connect® line set, DIYPRO® armored cable, wireless remote, and installation documentation. Items such as a wall bracket or pad for the outdoor unit, the breaker and disconnect, and power wiring from your panel are typically purchased separately. Wall brackets and line set covers are in our accessories collection.

How long does installation take?

Many homeowners complete installation in a single day, depending on the installation location, line set routing, and electrical requirements.

Does the system provide both heating and cooling?

Yes. MRCOOL DIY® systems are heat pumps that provide both heating and cooling for year-round comfort.

Can I control the system from my phone?

Yes. MRCOOL DIY® systems support SmartHVAC app control and select voice assistant integrations.

Product Resources

Access installation guides, specifications, warranty information and technical documentation for your MRCOOL DIY® system.

📄 Installation Manual
📊 Specification Sheet
🎮 Remote Manual
🛡 Warranty Information

Why Choose MRCOOL DIY®?

See how a DIY-designed system compares with a typical professionally installed mini split.

Feature MRCOOL DIY® Typical pro-installed mini split
Designed for homeowner installation✓✕
Refrigerant line setPre-charged Quick Connect®Cut, flare, vacuum and charge on site
Vacuum pump & manifold gaugesNot requiredRequired
HVAC certification for refrigerant workNot requiredTypically required
HVAC contractor laborAvoidedAdded to project cost
Electrical hookupDedicated circuit — electrician may be neededDedicated circuit — electrician may be needed
Smart app control✓Varies

Electrical work and permit rules vary by location. See the FAQ above and confirm local requirements before installing.