Best Mini Split 4 Zone Systems for Efficient Multi-Room Cooling and Heating 2025

This post contains affiliate links. When you buy through links, we may receive a small percentage of the sale.

Choosing the right 4 zone mini split system allows you to control the temperature in multiple rooms independently, offering energy-efficient comfort year-round. Below is a summary of some of the best multi-zone mini split air conditioners that deliver powerful cooling, heating, and smart features. These systems vary by BTU capacity, energy ratings, and included equipment, so you can find the best fit for your space and climate.

Product BTU Capacity Energy Efficiency (SEER2) Voltage Smart Features
Della 36K BTU Quad 4 Zone Mini Split 9K+9K+12K+18K 19 SEER2 208-230V Works with Alexa, Wifi
COSTWAY 30k Quad 4 Zone Mini Split AC 9K+9K+9K+18K 23 SEER2 208-230V Wifi Enabled
TOSOT 36,000BTU Quad 4 Zone Mini Split AC 9K+9K+9K+9K 21 SEER2 230V Wifi-Enabled
ROVSUN 4 Zone 35000 BTU Mini Split AC 12K+12K+12K+12K 19 SEER2 208-230V Wifi Compatible
OLMO 36,000 BTU Quad 4-Zone Mini Split 9K+9K+9K+9K 21 SEER2 230V Smart Port App Control

Della 36K BTU Quad 4 Zone Mini Split with Alexa

Della 36K BTU Quad 4 Zone Mini Split

Check Price on Amazon

The Della 36K BTU 4 zone system offers versatile coverage suitable for up to 2,350 square feet, featuring four indoor units (9,000+9,000+12,000+18,000 BTU) with individual controls for each area. It operates efficiently in climates as cold as 5°F with its inverter and heat pump technology. The unit supports Alexa voice control and includes full installation kits with copper line sets and drain pipes. Certified by ETL and AHRI, the unit emphasizes energy efficiency with a 19 SEER rating and offers up to 30% power savings. Note the model does not perform self-cleaning despite the button presence.

COSTWAY 30k Quad 4 Zone Mini Split AC with Wifi

COSTWAY 30k Quad 4 Zone Mini Split AC

Check Price on Amazon

The COSTWAY 30k BTU 4 zone mini split is designed to precisely cool and heat multiple rooms independently with indoor units rated 9,000 and 18,000 BTU. Certified with a high 23 SEER2 and 10 HSPF2 ratings, it uses R32 refrigerant for a greener footprint and reduces energy consumption significantly. Equipped with six operational modes including auto, cool, heat, dry, fan, and sleep, the system supports five fan speeds and offers wifi connectivity for enhanced control.

TOSOT 36,000BTU Quad 4 Zone Mini Split AC Cosmo Series

TOSOT 36,000BTU Quad 4 Zone Mini Split AC

Check Price on Amazon

The TOSOT Cosmo series 36,000 BTU multi-zone system includes four 9,000 BTU indoor units for balanced temperature control in four rooms. Rated at 21 SEER2 and 10 HSPF2, it delivers up to 24% energy savings versus older systems. The unit performs well in extreme weather, functioning in temperatures from -22°F to 118°F with an intelligent defrost feature to improve heating efficiency. The system is Energy Star certified and eligible for federal rebates.

ROVSUN 4 Zone 35000 BTU Mini Split AC and Heating System

ROVSUN 4 Zone 35000 BTU Mini Split

Check Price on Amazon

The ROVSUN 35,000 BTU 4 zone mini split features four indoor units rated equally at 12,000 BTU each with individual controllers, suited for both cooling and heating year-round. Its inverter heat pump system works in ambient temperatures from -13°F to 131°F enabling use in diverse climates. With 19 SEER2 energy efficiency, it saves up to 30% on power consumption. Additional features include self-diagnosis, auto defrost, iFEEL mode, and multiple fan speeds enhancing user comfort.

OLMO 36,000 BTU Quad 4-Zone Ductless Mini Split System

OLMO 36,000 BTU Quad 4-Zone Mini Split

Check Price on Amazon

The OLMO 36,000 BTU quad zone mini split provides precise climate control with four 9,000 BTU indoor units and supports smart control via a dedicated smartphone app. Certified at 21 SEER2 efficiency, it operates on 230V power and supports heating down to -13°F. This system includes comprehensive installation kits with pre-charged copper line sets and requires professional installation. It features whisper technology for quieter operation, suitable for bedrooms and living areas.

Buying Guide For Choosing The Best 4 Zone Mini Split System

Selecting the ideal 4 zone mini split requires attention to several key factors to ensure optimal comfort, efficiency, and user convenience.

1. Cooling and Heating Capacity

Assess the total BTU requirements based on your home’s square footage and room size. Multi-zone systems often combine multiple indoor units with varying BTU ratings to match individual room needs. Ensure the outdoor unit’s capacity adequately supports all indoor units combined.

2. Energy Efficiency Ratings

Look for systems with a high SEER2 (Seasonal Energy Efficiency Ratio) and HSPF (Heating Seasonal Performance Factor) ratings. Higher ratings translate to lower energy consumption and cost savings over time. Energy Star certification is a reliable indicator of efficiency.

3. Climate Suitability

Check the operating temperature range, especially heating capabilities in colder climates. Some units offer advanced heat pump technology and defrost modes that allow effective heating in sub-zero temperatures.

4. Smart Features and Controls

Wifi connectivity, smartphone app control, and voice assistant compatibility enhance ease of use. Individual room temperature controls enable customized comfort and prevent wasted energy.

5. Installation and Maintenance

Consider the inclusion of installation kits such as copper line sets, drainage pipes, and communication wires. Professional installation is typically recommended for mini splits to ensure proper setup for reliability and warranty validation. Confirm warranty terms and support availability.

6. Noise Levels

Check product details for noise ratings, especially the indoor units if placing them in bedrooms or quiet spaces. Technologies like whisper mode reduce operational noise for better comfort.

7. Environmental Impact

Choose units using eco-friendly refrigerants like R32 and those designed to minimize global warming potential (GWP), aligning with sustainable living goals.

By balancing these considerations, you can select a 4 zone mini split system that efficiently meets your multi-room cooling and heating needs with user-friendly features and long-term savings.

Leave a Comment