For homeowners seeking efficient climate control across multiple rooms, multi unit mini split systems offer a flexible and energy-saving solution. These ductless heat pumps provide independent temperature control for various zones, ensuring comfort tailored to individual spaces. Below is a summary of top-rated multi unit mini split systems available on Amazon that combine energy efficiency, smart features, and reliable performance.
| Product | BTU Capacity | Zones | SEER2 Rating | Smart Features |
|---|---|---|---|---|
| COSTWAY 18k Dual 2 Zone Mini Split | 12,000 + 12,000 | 2 | 22 | WiFi Enabled |
| DELLA 18K BTU ODU 2 Dual Zone Mini Split | 12,000 + 12,000 | 2 | 19 | WiFi, Alexa Compatibility |
| Della 27K BTU Tri 3 Zone Mini Split | 9,000 + 9,000 + 9,000 | 3 | 19 | WiFi, Alexa Compatibility |
| COSTWAY 30k Quad 4 Zone Mini Split AC | 9,000 + 9,000 + 9,000 + 18,000 | 4 | 23 | WiFi Enabled |
| Della 36K BTU Quad 4 Zone Mini Split | 9,000 + 9,000 + 9,000 + 18,000 | 4 | 19 | WiFi, Alexa Compatibility |
Content Navigation
- COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner
- DELLA 18K BTU ODU 2 Dual Zone Mini Split Air Conditioner
- Della 27K BTU ODU Tri 3 Zone Mini Split Air Conditioner
- COSTWAY 30k Quad 4 Zone Mini Split Air Conditioner
- Della 36K BTU Quad 4 Zone Multi Zone Mini Split Air Conditioner
- Buying Guide for Multi Unit Mini Split Systems
COSTWAY 18k Dual 2 Zone Mini Split Air Conditioner
The COSTWAY 18k Dual 2 Zone Mini Split is designed for multi-room cooling with two 12,000 BTU indoor units controlled independently. It features 22 SEER2 inverter technology and uses eco-friendly R32 refrigerant, supporting energy-efficient operation and lower global warming potential. Certified by ETL, AHRI, and Energy Star, this system handles harsh climates with an outdoor unit chassis heating function suitable for temperatures from -13℉ to 125℉.
With six operating modes including auto, cool, heat, dry, fan, and sleep, plus five wind speed settings, this ductless mini split accommodates varied comfort needs. Additional features like auto swing and health modes enhance air quality and user comfort, making it ideal for year-round use.
DELLA 18K BTU ODU 2 Dual Zone Mini Split Air Conditioner
The DELLA 18K BTU Dual Zone Mini Split offers efficient cooling and heating with a 19 SEER2 rating and inverter technology that can reduce power consumption by up to 30%. It comes equipped with two 12,000 BTU indoor units that can be individually controlled via separate controllers for customized climate management.
This ductless system supports environments down to 5℉ and covers up to 1100 sq. ft. It comes pre-charged, ETL and AHRI certified, and includes two 16ft copper pipes and standard installation kits. While it offers WiFi and Alexa compatibility, note it lacks a functional self-cleaning mode despite display options.
Della 27K BTU ODU Tri 3 Zone Mini Split Air Conditioner
The Della 27K BTU Tri 3 Zone Mini Split supports three rooms with three 9,000 BTU indoor units and one outdoor condenser. It has a 19 SEER inverter system and delivers notable power savings through DC inverter technology, suitable for climates as low as -4℉. Each zone enjoys independent temperature control through separate remotes.
This unit cools and heats up to 1200 sq. ft. and includes 16ft copper line sets, drain pipes, and installation kits. Supporting Alexa and WiFi, it enhances convenience but shares the limitation of a non-functional self-cleaning display option.
COSTWAY 30k Quad 4 Zone Mini Split Air Conditioner
Offering extensive coverage, the COSTWAY 30k Quad 4 Zone Mini Split includes four indoor units: three 9,000 BTU and one 18,000 BTU, each independently adjustable for multi-zone comfort. This system boasts a high efficiency 23 SEER2 rating and uses R32 refrigerant, delivering green operation with certifications from ETL and AHRI.
Available modes encompass auto, cool, heat, dry, fan, and sleep with multiple fan speeds, and features like auto swing and air health functions. The outdoor unit’s chassis heater enables reliable performance from freezing to hot temperatures (-13℉ to 125℉).
Della 36K BTU Quad 4 Zone Multi Zone Mini Split Air Conditioner
The Della 36K BTU Quad Mini Split serves up to 2200 sq. ft. with four indoor handlers: three 9,000 BTU units and one 18,000 BTU unit. Each zone has its own controller, enabling personalized temperature control. It operates efficiently down to 5℉ and includes full installation kits with copper piping and drain lines.
Alexa and WiFi smart functionality are built-in, making remote adjustments possible. With a quiet sound level near 50 dBa, it suits both residential and light commercial applications. Like other Della units, this model does not support actual self-cleaning despite the display feature.
Buying Guide for Multi Unit Mini Split Systems
When choosing a multi unit mini split system, several factors should be carefully considered to ensure it meets your home’s heating and cooling needs effectively.
1. Number of Zones and Coverage Area
Determine how many rooms or zones you need to control independently. Systems range from 2 to 4 zones, with total cooling capacities varying approximately from 18,000 to 36,000 BTUs. Confirm the approximate square footage each unit can handle to suit your space.
2. Energy Efficiency Ratings
Look for a high SEER2 rating (Seasonal Energy Efficiency Ratio) and HSPF rating for heating. Higher ratings indicate greater efficiency and potential energy savings. Units using R32 refrigerant typically offer lower environmental impact and improved efficiency.
3. Climate Compatibility
Check if the outdoor unit includes features like chassis heating to function reliably in extreme climates. Some models operate in temperatures as low as -13℉, essential for colder regions.
4. Smart Features and Controls
WiFi-enabled models with compatibility for Alexa or Google Assistant allow convenient remote operation and integration into smart home setups. Separate controls per indoor unit enable tailored comfort across zones.
5. Installation Considerations
Many units come with pre-charged refrigerant and installation kits, including copper piping and drain lines. Pay attention to the required electrical specifications (e.g., 115V vs. 208-230V) and fuse sizes. Professional installation is recommended for optimal performance and warranty compliance.
6. Noise Level
Quiet operation is a key factor, especially for bedrooms and living areas. Look for units specifying low decibel ratings (around 50 dBa or less) for minimal disruption.
7. Maintenance Features
While some systems display a self-cleaning option, many do not perform actual cleaning cycles. Plan for routine filter cleaning and maintenance to keep unit efficiency and air quality high.