Mini split multi zone systems offer an energy-efficient, flexible solution to cooling and heating multiple rooms independently. These ductless systems are perfect for homeowners seeking customizable comfort across several spaces, while reducing energy consumption. Below is a summary table of our top picks, featuring various BTU capacities, SEER2 ratings, and smart home compatibility to help you find the ideal mini split multi zone system.
| Product | BTU & Zones | Energy Efficiency | Smart Features |
|---|---|---|---|
| COSTWAY 18k Dual 2 Zone Mini Split | 12,000 + 12,000 BTU, 2 Zones | 22 SEER2, R32 Refrigerant | WiFi Enabled |
| DELLA 18K Dual Zone Mini Split | 9,000 + 9,000 BTU, 2 Zones | 19 SEER2, DC Inverter | WiFi, Alexa Compatible |
| COSTWAY 30k Quad 4 Zone Mini Split | 9,000 + 9,000 + 9,000 + 18,000 BTU, 4 Zones | 23 SEER2, R32 Refrigerant | WiFi Enabled |
| Della ODU Tri 3 Zone 27K BTU Mini Split AC | 9,000 + 9,000 + 18,000 BTU, 3 Zones | 19 SEER2, DC Inverter | WiFi, Alexa Compatible |
| ROVSUN 28K Tri Zone WiFi Mini Split AC | 9,000 + 9,000 + 12,000 BTU, 3 Zones | 20 SEER2, Inverter Tech | WiFi Enabled |
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COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner
This 18000 BTU 2 zone mini split AC provides flexible cooling solutions with individual temperature adjustment for each room. With a chassis heating function, it operates reliably in extreme climates ranging from -13℉ to 125℉. The unit’s inverter technology supports an impressive 22 SEER2 rating and uses environmentally friendly R32 refrigerant that lowers the global warming potential.
It features multiple modes – auto, cool, heat, dry, fan, and sleep – plus 5 fan speed options including strong airflow and auto swing. ETL and AHRI certifications reinforce its quality and energy efficiency, making it a suitable choice for sustainable multi-zone comfort.
DELLA 18K BTU ODU 2 Dual Zone Wifi Mini Split
The Della dual zone mini split delivers 9000 + 9000 BTU indoor units with independent controls, ideal for spaces up to 800 Sq. Ft. each. It boasts 19 SEER2 efficiency and ETL & AHRI certification, along with a heat pump capable of operating in environments down to -4℉. The DC inverter provides up to 30% energy savings through efficient power modulation.
This system includes 16-foot copper installation kits and pre-charged lineset for easier setup. Though it lacks a self-cleaning function, it supports Alexa for voice control and smart home integration, enhancing convenience for multi-zone climate control.
COSTWAY 30k Quad 4 Zone Mini Split Air Conditioner
With a total capacity of 30,000 BTU distributed over four zones (three 9,000 BTU and one 18,000 BTU indoor units), this COSTWAY system covers more extensive space requirements. It features top-tier 23 SEER2 efficiency, utilizing the environmentally preferable R32 refrigerant and inverter technology to reduce energy usage without sacrificing performance.
The system runs smoothly in temperatures from -13℉ to 125℉, enhanced by a chassis heating function. Six operational modes and five fan speed options maximize user comfort and customization, while WiFi connectivity enables remote control from anywhere for each zone individually.
Della ODU Tri 3 Zone 27K BTU Mini Split AC
This tri-zone unit supports 27,000 BTU total output divided into two 9,000 BTU units and one 18,000 BTU air handler. Each zone enjoys separate temperature control with dedicated controllers, perfect for homes requiring balanced but varied climate zones.
It offers quiet operation at only 50 dBA, digital inverter plus technology that provides up to 30% power savings, and is AHRI and ETL certified. The package includes all necessary installation parts, but professional installation is recommended due to the line-set vacuuming and refrigerant balancing requirements.
ROVSUN 28000 BTU Tri Zone WIFI Mini Split System
This ROVSUN mini split system combines a 28,000 BTU outdoor condenser with three indoor air handlers rated at 9,000, 9,000, and 12,000 BTU. The inverter and heat pump technology allows operation in temperatures as low as -13℉, accommodating year-round comfort for larger homes or multi-use spaces.
A comprehensive feature set includes iFEEL mode, auto defrost, sleep mode, silent operation, and a 24-hour timer. Certified for ETL and AHRI compliance, this unit ensures energy-efficient performance with a 20 SEER2 rating and supports WiFi control for flexible multi-zone management.
Buying Guide for Mini Split Multi Zone Systems
BTU Capacity and Number of Zones
Select a system based on the total square footage you need to heat or cool. Each indoor unit (zone) has a BTU rating indicating its capacity. Calculate the room sizes and choose accordingly to avoid undersized or oversized units. Systems range typically from dual zone to quad zone setups.
Energy Efficiency Ratings
Check the SEER2 (Seasonal Energy Efficiency Ratio) and HSPF2 (Heating Seasonal Performance Factor) ratings to gauge energy savings. Higher SEER2 ratings indicate more efficient cooling performance, which can lead to reduced electricity bills. Look for ENERGY STAR certification or equivalent for verified efficiency.
Refrigerant Type
Modern mini splits use eco-friendly refrigerants like R32 that have lower global warming potential (GWP) compared to older types. This contributes not only to environmental sustainability but compliance with regulatory standards.
Smart Features and Controls
Many systems now offer WiFi connectivity and voice assistant compatibility (Alexa, Google Assistant), enabling remote and hands-free operation. Individual zone control allows customized temperatures, enhancing comfort and saving energy.
Installation Requirements
Consider the installation complexity and whether professional help is recommended. Pre-charged line sets and included installation kits simplify setup, but systems with multiple zones often require more technical expertise, particularly concerning vacuuming lines and refrigerant balancing.
Climate Compatibility
If you live in an area with extreme temperatures, check the outdoor unit’s operational range. Some units can operate efficiently in subzero winter temperatures, which is critical for heat pump performance.
Noise Level
Look for systems with low decibel ratings for indoor units to ensure quiet operation. This is especially important for bedrooms, offices, or living rooms where noise may be disruptive.
Choosing the best mini split multi zone system depends on your home’s layout, climate needs, efficiency goals, and smart home preferences. Carefully assess these factors to select a system that delivers optimal comfort across multiple rooms while conserving energy.