Choosing the right DIY multi zone mini split system can enhance your home’s comfort by providing precise temperature control in different rooms. These ductless systems offer energy-efficient cooling and heating solutions ideal for multi-room setups. Below is a summary of the top-rated DIY mini splits optimized for various space requirements and energy savings.
Product Name | Zones | BTU Capacity | Energy Efficiency | Coverage Area |
---|---|---|---|---|
DELLA 18K BTU ODU 2 Dual Zone 9000 9000 BTU Wifi Mini Split | 2 Zones | 18,000 BTU | 19 SEER2 | Up to 800 Sq.Ft |
COSTWAY 18k Dual 2 Zone Mini Split AC Heat Pump Full Set | 2 Zones | 18,000 BTU | 22 SEER2 | Multiple Rooms |
Della 36K BTU Quad 4 Zone Mini Split Wifi Air Conditioner | 4 Zones | 36,000 BTU | 19 SEER2 | Up to 2350 Sq.Ft |
Della ODU Tri 3 Zone 27K BTU Mini Split AC Wifi Heat Pump | 3 Zones | 27,000 BTU | 19 SEER2 | Up to 1800 Sq.Ft |
ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC Heating System | 3 Zones | 28,000 BTU | 20 SEER2 | Multiple Rooms |
DELLA 18K BTU 2 Dual Zone Wifi Mini Split Air Conditioner

This Della 2 Zone 18000 BTU mini split is an energy-efficient ductless inverter system featuring a heat pump suitable for climates as low as -4℉ (-20℃). The system includes two 9,000 BTU indoor air handlers with individual controllers enabling precise control for each room, covering up to 800 square feet combined. Installation kits with 16ft copper piping are included for a DIY setup. With a 19 SEER2 rating and DC inverter technology, it promises up to 30% power savings. Note that while the display shows a self-cleaning option, this function is not active in this model.
COSTWAY 18k Dual 2 Zone Mini Split AC Heating System Wifi Enabled

The COSTWAY 18,000 BTU dual zone mini split is a versatile air conditioning and heating system with WiFi connectivity allowing remote control via mobile devices. It supports independent room temperature settings for two zones: 9,000 BTU and 12,000 BTU. Certified for energy efficiency with a 22 SEER2 rating and operating on eco-friendly R32 refrigerant, this system covers multiple rooms while using less energy and reducing global warming potential (GWP). It includes six operational modes and five fan speeds for tailored comfort year-round.
Della 36K BTU Quad 4 Zone Mini Split Air Conditioner with Alexa

This Della 4 Zone 36000 BTU system efficiently cools and heats up to 2,350 square feet, featuring four indoor handlers with capacities of 9K, 9K, 12K, and 18K BTU respectively. Each indoor unit has separate temperature controls to cater to individual rooms. The heat pump operates effectively down to -4℉, and the system boasts a 19 SEER2 rating. The package includes four 16ft copper line sets, drain pipes, installation kits, and supports Alexa voice controls for added convenience.
Della ODU Tri 3 Zone 27K BTU Mini Split AC with Wifi and Alexa

The Della 27,000 BTU tri-zone mini split supports three indoor air handlers: two at 9,000 BTU and one at 18,000 BTU, effectively cooling up to 1,800 square feet. Installed with supplied 16ft copper piping and drain lines, this model features a 19 SEER2 inverter heat pump system designed for quiet operation at 50 dBa. Individual room controls help maintain ideal comfort, and compatibility with Alexa and WiFi adds smart home integration. Professional installation is recommended due to line-set vacuuming and refrigerant adjustments.
ROVSUN 28000 BTU Tri Zone Mini Split AC Heating System Wifi Enabled

The ROVSUN 28,000 BTU tri-zone ductless system offers three indoor air handlers with separate temperature controls. Suitable for various spaces including homes, garages, and commercial areas, it uses a heat pump that operates in temperatures as low as -13℉. The system features 20 SEER2 energy-efficient inverter technology with advanced modes such as turbo speed, auto defrost, silent and sleep modes. ETL and AHRI certification guarantee compliance with performance and safety standards.
Buying Guide For DIY Multi Zone Mini Split Systems
When selecting a DIY multi zone mini split system, consider the following key factors to ensure you find a unit that fits your needs:
1. Number of Zones and Coverage Area
Determine how many rooms require separate temperature control. Mini splits come in dual, tri, or quad-zone configurations. Assessing the square footage each indoor unit supports helps you choose the right size. Oversizing or undersizing can impact efficiency and comfort.
2. Energy Efficiency Ratings
Look for units with high SEER2 (Seasonal Energy Efficiency Ratio) and HSPF (Heating Seasonal Performance Factor) ratings. Higher ratings translate into energy savings and lower utility bills. Also, check if the system uses environmentally friendly refrigerants like R32.
3. Heating Capabilities and Climate Suitability
For year-round comfort, select a system with a reliable heat pump capable of operating efficiently in low outdoor temperatures relevant to your geographic location. Some models provide functionality down to -13℉.
4. Installation Requirements
DIY-friendly kits come with installation hardware including copper pipes and drain lines. However, consider your experience level: some multi-zone setups require professional installation due to refrigerant handling and line-set adjustments.
5. Smart Features and Controls
WiFi connectivity and voice assistant compatibility (e.g., Alexa) enable remote control and automation for convenience. Independent room controls ensure customized comfort in multiple spaces.
6. Noise Levels
Check decibel ratings (dBa) for indoor units to ensure silent or quiet operation, enhancing comfort especially in bedrooms or offices.
7. Certifications and Reliability
ETL and AHRI certifications confirm that the product adheres to safety and energy efficiency standards. These certifications also provide peace of mind regarding the performance and durability of the system.
Evaluating these features will help you select the best multi zone mini split system that fits your home size, climate demands, and personal preferences, ensuring efficient and effective climate control.