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Welcome to the South Mini Splits collection for DIY System. We feature high-efficiency systems from industry leaders like Cooper & Hunter, OLMO, MRCOOL, and Bravo.

These user-friendly, simplified, and highly popular units are the ideal solution for homeowners seeking significant cost savings, quick installation, and energy-efficient climate control without the need for specialized HVAC tools or a costly professional.

💡Why Choose South Mini Splits for Your DIY System?

✅ Wholesale Pricing: Competitive rates on top-tier HVAC equipment.

✅ USA-Based Support: Expert help from sizing to post-install troubleshooting.

✅ Free Shipping Over $300: Get your complete system delivered fast.

What is DIY Mini Split

A Do-It-Yourself (DIY) Mini Split System is engineered to eliminate the most complicated steps of traditional AC installation: evacuation and charging. Its selection offers a low-barrier entry into high-efficiency HVAC, as the pre-charged lines and proprietary quick-connect fittings allow the average homeowner to install the system with standard tools in a few hours.

It is the perfect fit for areas requiring independent climate control, such as:

  • Garages, Workshops, and Man Caves: Providing year-round heating and cooling to spaces traditionally difficult or expensive to condition.
  • Home Additions/Renovations: Adding comfort to a new room or sunroom without extending complex ductwork from the central system.
  • Temporary or Investment Properties: Offering flexible climate control and high energy efficiency (SEER) that increases property value.

The DIY Advantage: Eliminating the Technical Barrier

The critical difference of a DIY system is the pre-charged line set and quick-connect functionality.

  • No Vacuum Pump Required: Traditional systems require a professional to pull a deep vacuum on the line set to remove moisture and contaminants. DIY systems use proprietary connections that make this unnecessary.
  • No HVAC License Needed: Because the system is pre-charged and requires no refrigerant handling, installation is not restricted to licensed professionals in most areas, saving hundreds on labor costs.

Inverter Efficiency: Like all modern mini splits, DIY systems utilize Inverter Technology. This allows the unit to modulate its output, ensuring consistent comfort, preventing short cycling, and drastically reducing energy costs.

Mini Split BTU Sizing & Application Guide

Use our quick reference chart to match your room size with the ideal system capacity.

Capacity Sq. Footage Application
6,000 BTU150–250Small bedrooms & offices
9,000 BTU250–450Standard bedrooms
12,000 BTU450–600Kitchens & studios
18,000 BTU600–1,000Living rooms & garages
24,000 BTU1,000–1,200Open floor plans
36,000 BTU1,500–1,700Commercial & fitness
48,000 BTU1,900–2,100Large warehouses
60,000 BTU2,400–2,800+Commercial estates

When to "Size Up"

High Ceilings (10ft+)

If your ceilings are 10 feet or higher, you are cooling a larger volume of air. We recommend increasing your BTU choice by 20%.

Poor Insulation

For older homes or buildings with single-pane windows, opt for the next size up to ensure the unit can maintain the set temperature.

Kitchen Environments

Appliances generate significant heat. If the unit is for a kitchen, add 4,000 BTUs to your square footage calculation.

Heavy Sun Exposure

Rooms with large south-facing windows or "sunrooms" act like greenhouses. Increase your BTU capacity by 10-15%

Occupancy

If the area regularly hosts more than two people (like a conference room or classroom), add 600 BTUs per additional person..

Need Help Sizing?

If you aren't sure which unit is right for your project, use our BTU Calculator or contact our USA-based support team for a custom recommendation.

Open BTU Calculator

FAQs/Frequently Asked Questions

Q: What is the main advantage of choosing a DIY mini split system?

A: The main advantage is the cost savings and ease of installation. They are designed for the average homeowner to install, saving thousands in labor costs while still delivering high-efficiency comfort.

Q: Are all DIY systems wall-mounted?

A: The majority of DIY systems, particularly those from top brands like MRCOOL, utilize the Wall Mount indoor unit because it simplifies the installation process and offers effective air distribution.

Q: How long does a typical DIY installation take?

A: While times vary, most homeowners can complete the installation in 4 to 8 hours using common household tools, following the manufacturer's provided step-by-step guides.

Q: How do I size a DIY unit for my room?

A: Sizing must be based on the room's square footage and thermal load. As a general rule, you need approximately 20-25 BTUs per square foot. For instance, a 400 sq ft garage would require a 9,000 BTU DIY unit.

Q: Do I need a professional installer for a concealed ducted unit?

A: While DIY installation is possible for the outdoor condenser, the installation of the indoor ducted unit is highly recommended for professionals due to the complexity of integrating ductwork, balancing static pressure, and ensuring correct condensate drainage.