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Welcome to the South Mini Splits collection for Thermostats & Smart Controllers. We feature high-efficiency controls, smart accessories, and thermostats from industry leaders like Cooper & Hunter, OLMO, MRCOOL, and Bravo.

These smart, precise, and user-friendly devices are the ideal solution for maximizing energy efficiency, enabling remote mobile access, or integrating your ductless mini split into your smart home ecosystem.

💡 Why Choose South Mini Splits for Your Thermostat & Control Needs?

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

✅ USA-Based Support: Expert help from compatibility checks to post-install setup. 

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

What is a Mini Split Thermostat & Smart Controller?

A Mini Split Thermostat or Smart Controller is the operational nerve center of your ductless system. Unlike traditional central HVAC systems that rely on simple wall-mounted, low-voltage switches, modern mini split controls translate precise temperature and humidity feedback directly to the system's inverter module.

These highly capable, single-zone systems are designed for spaces between 450 and 650 square feet. They are powerful enough to handle larger living areas, master bedrooms, small apartments, or dedicated commercial spaces like server rooms and retail offices, providing precise climate control far more efficiently than window units or central AC alone.


When installing a 12,000 BTU unit in a residential setting, a key tip is to choose a location on the wall that is centrally positioned and away from direct heat sources, such as large windows or electronics. This ensures uniform air distribution throughout the room and prevents the unit's internal thermostat from giving false readings, thereby maximizing both comfort and energy efficiency. 

For commercial applications, such as small retail or office spaces, it is crucial to size the unit based on the occupancy load and the amount of heat-generating equipment (like computers and copiers), rather than relying solely on square footage. The insight here is that commercial spaces often require significantly more—about 20% to 30%—cooling capacity per square foot.  The 12k BTU unit is often ideal for providing consistent cooling in small, specialized zones, such as dedicated IT closets.

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.

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Frequently Asked Questions

A: Smart controllers enable mobile app control, scheduling, geofencing, and voice integration, allowing you to optimize energy consumption and adjust temperatures before you arrive home.

A: Standard mini split systems use digital communicating signals rather than 24V wiring. However, many systems can be connected to 24V thermostats using a brand-specific 24V Interface Adapter module.

A: Compatibility depends on whether your system uses an infrared (IR) remote receiver, a 4-wire communicating terminal, or a dedicated Wi-Fi port. Check your indoor unit model specs or consult with our technical support team.

A: Yes. Wall-mounted thermostats or remote sensors should be placed on an interior wall away from direct sunlight, drafts, and direct discharge airflow from the indoor head to ensure accurate readings.

A: Individual mini split heads typically require their own dedicated controller or zone sensor. However, smart management apps allow you to group multiple smart controllers together for single-tap master control.