Choosing the right mini split multi zone air conditioner is essential for keeping different areas of your home comfortable with individual temperature controls. These systems offer energy-efficient heating and cooling without ductwork, ideal for various room sizes and layouts. Below is a summary table highlighting five top multi zone mini split AC units, rated for performance, coverage, and smart features, helping you find the best fit for your home needs.
Product | Zones & BTU | SEER2 Rating | Key Features | Brand |
---|---|---|---|---|
COSTWAY 18k Dual 2 Zone Mini Split AC | 2 Zone (12000 + 12000 BTU) | 22 SEER2 | WiFi enabled, ETL, AHRI certified, Energy Star, R32 refrigerant | COSTWAY |
COSTWAY 30k Quad 4 Zone Mini Split AC | 4 Zone (9000 + 9000 + 9000 + 18000 BTU) | 23 SEER2 | Energy Star, WiFi, inverter tech, low GWP refrigerant | COSTWAY |
DELLA 18K BTU 2 Zone Wifi Mini Split AC | 2 Zone (9000 + 9000 BTU) | 19 SEER2 | Alexa compatible, pre-charged heat pump, ETL and AHRI certified | Della |
Della 27K BTU Tri 3 Zone Mini Split AC | 3 Zone (9000 + 9000 + 18000 BTU) | 19 SEER2 | Alexa & WiFi, quiet operation, pre-charged, energy efficient | Della |
ROVSUN 28000 BTU Tri Zone WiFi Mini Split AC | 3 Zone (9000 + 9000 + 12000 BTU) | 20 SEER2 | Heat pump, smart control, silent mode, ETL & AHRI certified | ROVSUN |
COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner

This mini split AC unit by COSTWAY delivers dual-zone independent temperature control with two 12000 BTU indoor units perfect for different rooms or zones. Rated at an impressive 22 SEER2, it provides energy-efficient cooling and heating with a low global warming potential refrigerant (R32). It withstands a broad range of outdoor temperatures from -13℉ to 125℉ thanks to its chassis heating feature, ensuring reliable operation year-round.
Featuring multiple operating modes including auto, cool, heat, dry, fan, and sleep, plus 5 fan speed settings, it offers tailored comfort with easy control. This ETL, AHRI, and Energy Star certified ductless system is WiFi enabled for remote adjustments, combining convenience and sustainability.
COSTWAY 30k Quad 4 Zone Mini Split Air Conditioner

The COSTWAY 30k model extends multi-zone comfort with four indoor units delivering a combined 30000 BTU cooling capacity. Each zone ranging from 9000 to 18000 BTU offers individual temperature settings for personalized comfort across multiple rooms or areas. With a higher 23 SEER2 rating, this system maximizes energy savings while supporting a lower environmental impact via R32 refrigerant.
Six modes and five fan speeds enable constant adaptation to user needs, while the chassis heating prevents chilling in extreme cold conditions. This Energy Star and AHRI certified ductless mini split with WiFi allows smart home integration, offering a practical solution to expansive home HVAC needs.
DELLA 18K BTU ODU 2 Dual Zone Wifi Mini Split Air Conditioner

Della’s 18K BTU dual zone mini split features two indoor units providing separate control for up to 800 sq. ft., ideal for zoning your living or working spaces. Operating at 19 SEER2 and featuring DC inverter technology and a heat pump, it offers up to 30% energy savings on power usage while supporting operation in temperatures as low as 5°F (-20°C).
The system is ETL and AHRI certified with pre-charged refrigerant lines for easier installation. Though it includes a self-cleaning button, the feature is non-operational. This system is Alexa compatible, allowing smart voice control and app-based routing for convenience.
Della ODU Tri 3 Zone 27K BTU Mini Split AC WiFi Enabled

This tri-zone mini split system from Della offers three indoor air handlers with 27,000 BTU total capacity tailored for multi-room cooling and heating. Each zone is individually controllable via included remote and supports voice controls through Alexa and WiFi connectivity. Rated at 19 SEER2, this pre-charged, ETL and AHRI certified heat pump system maximizes energy efficiency.
The system operates quietly at 50 dBA and features customizable temperature settings from 60 to 90 degrees Fahrenheit. It requires professional installation with precise line-set adjustments for optimal refrigerant balance, ensuring long-term performance and comfort.
ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC/Heating System

The ROVSUN 28000 BTU tri-zone mini split includes three indoor units (9000 + 9000 + 12000 BTU) and a powerful heat pump for energy-efficient year-round comfort. This system supports wifi remote control and advanced features such as auto defrost, silent mode, and multiple fan speeds. With a 20 SEER2 rating, it excels in reducing energy usage by about 30% compared to legacy systems.
Designed for versatility, it operates in wide ambient temperature ranges down to -13℉ and supports functions like iFEEL temperature sensing for personalized environment control. ETL and AHRI certifications ensure reliable safety and performance.
Buying Guide for Mini Split Multi Zone Air Conditioners
When selecting a multi zone mini split AC system, consider these key factors to ensure optimal efficiency, comfort, and compatibility for your home:
- Number of Zones and BTU Capacity: Match the number of indoor units and their combined BTUs to the number and size of rooms you want to heat or cool. Each room/zone should have a properly sized unit for efficient, balanced performance.
- Energy Efficiency (SEER2 Rating): Higher SEER2 numbers indicate better cooling efficiency. Aim for units rated 19 SEER2 or above for significant energy savings over traditional HVAC systems.
- Refrigerant Type: Modern units use environmentally friendly refrigerants like R32, which have lower global warming potential (GWP) and meet energy regulations.
- Smart Controls and Connectivity: Features such as WiFi compatibility, Alexa, and Google Assistant integration provide ease in temperature adjustments and scheduling remotely.
- Heating Capability and Cold Climate Operation: Heat pumps with low ambient temperature operation capability ensure your system works effectively year-round including in cold winters.
- Noise Level: Check for units designed to operate quietly, especially important for bedrooms and living spaces.
- Installation Requirements: Some systems require professional installation including line-set vacuuming and refrigerant adjustments. Verify compatibility with your home’s electrical capacities and available space.
- Certification and Safety: Look for ETL, AHRI, and Energy Star certifications which confirm safety, quality, and efficiency standards compliance.
By evaluating these aspects alongside your space needs and budget, you can select a multi zone mini split AC system that maximizes comfort while minimizing energy consumption and environmental impact.