Choosing the best DIY mini split 3 zone system can significantly improve your home’s climate control with customizable temperatures in multiple rooms. These energy-efficient units combine compact design, smart technology, and powerful heating and cooling capabilities. Below is a summary table showcasing top-rated 3 zone mini splits available on Amazon, followed by detailed product reviews.
| Product | BTU | Energy Efficiency | Zones | Smart Features |
|---|---|---|---|---|
| Della Mini Split Air Conditioner ODU Tri 3 Zone | 27,000 | 19 SEER2 | 3 | Wifi, Alexa Compatible |
| ROVSUN 28000 BTU Tri Zone WIFI Mini Split | 28,000 | 20 SEER2 | 3 | Wifi, Turbo Function |
| Cooper & Hunter 3 Zone Ceiling Cassettes | 28,000 | 25 SEER2 | 3 | Whisper Technology |
| TOSOT 30,000 BTU Tri Zone Mini Split AC | 30,000 | 21 SEER2 | 3 | Wifi Enabled, Energy Star |
| Cooper & Hunter 28,000 BTU Tri 3-Zone Wall Mount | 28,000 | 24.6 SEER2 | 3 | Smartphone Compatible (adapter required) |
Della Mini Split 3 Zone 27K BTU – Energy Efficient Cooling
The Della Mini Split 3 Zone 27K BTU system boasts 19 SEER2 efficiency using inverter technology that can cut power consumption by up to 30%. It includes three indoor air handlers (9,000 + 9,000 + 12,000 BTU) that allow independent temperature control in separate rooms. The unit supports cooling and heating with a heat pump operable down to -4°F, ideal for year-round comfort.
The system comes fully pre-charged and includes installation kits along with copper piping and drain pipes. Although it has a self-cleaning option shown in the interface, this function is not operational. It works seamlessly with Alexa, enhancing convenience with smart home integration.
Features include 4D airflow, turbo function, dry mode, sleep mode, and an eco-saving mode, catering to user comfort and efficiency.
ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC and Heat Pump
The ROVSUN 28000 BTU is a powerful tri-zone mini split system composed of one 28,000 BTU outdoor condenser and three indoor units (two 9,000 BTU and one 12,000 BTU). It operates down to -13°F, enabling reliable heating in colder climates.
With 20 SEER2 inverter technology, the unit provides approximately 30% energy savings while maintaining high performance for cooling, heating, dehumidifying, and fan functions. It supports fast temperature adjustments via a turbo mode and has an iFEEL mode for sensor-based climate regulation.
Additional features include auto defrost, silent mode, and a 24-hour timer, making it versatile for homes and commercial spaces such as kitchens and garages.
Cooper & Hunter 3 Zone 28,000 BTU Ceiling Cassette System
The Cooper & Hunter 3 Zone Ceiling Cassettes offer 28,000 BTU power with a whisper-quiet operation ideal for residential or commercial applications. It features three ceiling cassette indoor units measuring 9,000 + 12,000 + 12,000 BTU.
This system is rated at an impressive 25 SEER2 and operates on 208-230V power. It is ETL Intertek approved and AHRI certified, ensuring safety and efficiency. The unit supports heating in ambient temperatures as cold as -13°F.
The package includes a high-grade 25-foot installation kit with pre-flared insulated copper line sets and drainage extensions. Its recessed ceiling design is suitable when wall space is limited.
TOSOT 30,000 BTU Tri Zone Mini Split AC with Heat Pump
The TOSOT Cosmo Series Tri Zone Mini Split features 30,000 total BTUs split across two 9,000 BTU and one 12,000 BTU indoor units, capable of managing temperatures from 61°F to 86°F independently in three zones.
Rated at 21 SEER2 and 10 HSPF2, this Energy Star-certified system is designed to offer up to 24% energy savings compared to traditional units. It handles extreme weather from -22°F to 118°F with an intelligent defrost function optimizing heating efficiency.
This system is compatible with wifi control for modern smart homes and includes a 16.4-foot copper line set for easier installation.
Cooper & Hunter 28,000 BTU Tri 3-Zone Wall Mount Mini Split
This Cooper & Hunter Tri 3-Zone Mini Split includes three 12,000 BTU wall-mounted indoor units powered by a 28,000 BTU outdoor inverter condenser. It achieves up to 24.6 SEER2 efficiency to balance energy-saving performance with comfort.
The system uses R-410A refrigerant and is certified by ETL and AHRI. It operates quietly using whisper technology and supports heating to temperatures as low as -13°F. The kit includes 25-foot pre-flared insulated copper line sets and installation accessories for each indoor unit.
While compatible with smartphone control, it requires an additional USB smart adapter not included. This system is recommended for professional installation rather than DIY.
Buying Guide: How to Choose the Best DIY Mini Split 3 Zone System
1. Cooling and Heating Capacity (BTU)
BTU ratings indicate the unit’s ability to cool or heat space. For multi-zone systems, ensure the total BTU fits the combined square footage of your rooms. Zones typically contain indoor units with varied BTU capacities tailored to room size.
2. Energy Efficiency Ratings
Look for the SEER (Seasonal Energy Efficiency Ratio) rating. Higher SEER2 numbers mean better energy savings and lower operational costs. Units rated 19 SEER2 or above are considered energy efficient and may qualify for rebates.
3. Smart Controls and Connectivity
WiFi compatibility or support for smart assistants (Alexa, smartphone apps) enhances user convenience by enabling remote temperature control and scheduling features.
4. Installation Requirements and Included Kits
Some units come with comprehensive DIY installation kits including pre-charged refrigerant, copper tubing, drain pipes, and wiring. Confirm if professional installation is required or if the unit supports self-installation.
5. Noise Levels
Whisper technology or quiet operation modes are important if the units will be in bedrooms or living areas where noise can be disruptive.
6. Operating Range and Climate Suitability
Check the ambient temperature range for heating and cooling. Models capable of operating in very cold (-13°F or lower) or hot conditions are more versatile across seasons and locations.
7. Warranty and Certification
Choose systems certified by recognized organizations like AHRI and ETL for safety and performance, ideally with extended manufacturer warranties.