Finding the ideal multi mini split system can transform how you manage the temperature across different rooms in your home or office. These multi-zone HVAC units offer energy-efficient solutions with independent temperature settings, making them perfect for customized comfort. Below is a summary of top-rated and highly functional multi mini split systems designed for various space requirements and performance features.
| Product Name | Brand | Number of Zones | BTU Capacity | Energy Efficiency | Link |
|---|---|---|---|---|---|
| COSTWAY 18k Dual 2 Zone Mini Split AC | COSTWAY | 2 | 12000 + 12000 | 22 SEER2 | View on Amazon |
| ROVSUN 28000 BTU Tri Zone WIFI Mini Split | ROVSUN | 3 | 9000 + 9000 + 12000 | 20 SEER2 | View on Amazon |
| DELLA 18K Dual Zone Multi Zone Mini Split AC | Della | 2 | 12000 + 12000 | 19 SEER2 | View on Amazon |
| ROVSUN 3 Zone 28000 BTU Mini Split AC System | ROVSUN | 3 | 9000 + 9000 + 9000 | 20 SEER2 | View on Amazon |
| Della 27K BTU Tri 3 Zone Multi Zone Mini Split | Della | 3 | 9000 + 9000 + 9000 | 19 SEER2 | View on Amazon |
Content Navigation
- COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner
- ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC/Heating System
- DELLA 18K BTU ODU 2 Dual Zone WiFi Multi Zone Mini Split AC
- ROVSUN 3 Zone 28000 BTU Mini Split AC/Heating System
- Della 27K BTU ODU Tri 3 Zone WiFi Multi Zone Mini Split AC
- Buying Guide For Multi Mini Split Systems
COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner

This COSTWAY multi-zone mini split system features a total of 18,000 BTU cooling capacity split into two independent 12,000 BTU indoor units. Designed specifically for multi-room cooling, it enables precise temperature control for each space. The system operates reliably in extreme climate conditions spanning from -13℉ to 125℉ thanks to its chassis heating function, which protects the outdoor unit. Certified with Energy Star, ETL, and AHRI, this unit includes inverter technology reaching a 22 SEER2 energy efficiency rating with the eco-friendly R32 refrigerant to lower environmental impact. Users can select among 6 modes—auto, cool, heat, dry, fan, and sleep—with 5 wind speed options to tailor comfort. Features such as auto swing and health sensing further enhance daily usability.
ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC/Heating System

The ROVSUN 3-zone mini split system covers up to 28,000 BTU through three indoor units—two 9,000 BTU and one 12,000 BTU air handlers—each with individual controllers for independent room temperature management. Supporting heating and cooling functions, the system features a heat pump capable of operating in environments as cold as -13℉. It offers multiple modes including dehumidification, fan, Turbo speed-up, and iFEEL room sensing. Energy efficiency is supported by inverter technology with a 20 SEER2 rating, enabling roughly 30% energy savings over conventional systems. The unit is certified by ETL and AHRI, and is suitable for various spaces such as kitchens, bedrooms, commercial areas, and garages, combining performance with smart aesthetics.
DELLA 18K BTU ODU 2 Dual Zone WiFi Multi Zone Mini Split AC

The Della 18,000 BTU dual zone mini split system features two 12,000 BTU indoor air handlers, each with its own controller, ideal for cooling or heating rooms up to 1,100 sq. ft. Utilizing DC inverter technology, it achieves a 19 SEER2 efficiency while operating quietly and saving power by up to 30%. The pre-charged heat pump supports operation at temperatures down to -4℉. While it does not support the self-cleaning function, it offers reliable performance with included installation kits featuring 16-foot copper pipes and drain lines. Smart WiFi compatibility allows control via mobile or smart devices.
ROVSUN 3 Zone 28000 BTU Mini Split AC/Heating System

This ROVSUN 3 zone mini split air conditioner includes three 9,000 BTU indoor units connected to a single 28,000 BTU outdoor condenser, facilitating personalized climate control for multiple rooms. The system integrates an advanced inverter heat pump capable of heating and cooling in temperatures ranging from -13℉ to 131℉. Energy-saving features allow up to 30% reduction in electricity use, with ETL and AHRI certifications validating its reliability. Additional controls include automatic defrost, silent mode, 24-hour timer, and four-way airflow swing, making it a flexible choice for residential or commercial use.
Della 27K BTU ODU Tri 3 Zone WiFi Multi Zone Mini Split AC

This Della tri-zone mini split system provides a total of 27,000 BTU distributed evenly across three 9,000 BTU indoor units, each controlled independently. It uses DC inverter technology to deliver up to 30% energy savings, certified with ETL and AHRI, and supports low temperature operation down to -4℉. Providing coverage for up to 1,200 square feet, the system includes comprehensive installation kits such as 16-foot copper line sets and multiple drain pipes. Integrated WiFi and Alexa compatibility enable smart home connectivity for effortless operation and scheduling.
Buying Guide For Multi Mini Split Systems
Choosing the best multi mini split system depends on several critical factors to ensure optimal comfort, efficiency, and suitability for your space and lifestyle.
1. Number of Zones and BTU Capacity
Determine the number of rooms or zones you need to cool or heat independently. Each indoor unit serves one zone, so a multi-zone system with an outdoor condenser matching the total BTU of all indoor units is ideal. Ensure total BTU capacity matches your space square footage for effective heating and cooling.
2. Energy Efficiency Ratings
Look for SEER2 (Seasonal Energy Efficiency Ratio) ratings to understand how energy efficient the unit is. Higher SEER2 ratings, typically above 19, indicate better efficiency and lower electricity bills. Also, check for Energy Star certification for verified performance.
3. Climate Compatibility
Verify the operating temperature range, especially if you live in cold regions where systems must function reliably below freezing. Heat pump mini splits with low ambient heating capability (-13℉ or lower) are preferable for year-round climate control.
4. Installation and Kit Inclusions
Check what installation components are included, such as copper line sets, drain pipes, and installation kits. Longer line sets allow more flexibility in positioning indoor units. Pre-charged refrigerant systems simplify installation.
5. Smart Features and Controls
Smart control options including WiFi connectivity and compatibility with voice assistants like Alexa provide convenience for remote and automated operation. Multiple mode selections, timers, and sleep functions add to user comfort versatility.
6. Noise Levels
Quiet operation is vital for bedrooms and living spaces. Look for units with low decibel (dBA) ratings, ideally below 55 dBA, to ensure unobtrusive performance.
7. Refrigerant Type and Environmental Impact
Choose systems that use eco-friendly refrigerants such as R32, which have lower Global Warming Potential (GWP) for a greener environmental footprint.
Considering these factors carefully will help in selecting a multi mini split system that best fits your space size, climate needs, energy preferences, and budget while delivering maximum comfort and efficiency.