Best 20 SEER2 Mini Splits: 15 Spec-Based Picks
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Finding the best 20 SEER2 mini splits requires looking at hard specs rather than marketing claims. We compared 15 units ranked by their published efficiency and power requirements. The Rellytech 12000 BTU 20 SEER2 Mini Split leads because it runs on standard 115V circuits while offering Wi-Fi smart control. These picks are based strictly on the specifications published on the listings. Use this guide to decide which voltage and capacity fit your home.
Quick picks
The best fit for you
- You need smart control on a standard 115V circuit Rellytech 12000 BTU 20 SEER2 Mini Split It offers 20 SEER2 efficiency and Wi-Fi smart control on 115V power.
- You want the most compact indoor unit for small spaces COSTWAY 12000 BTU 115V Mini Split Its 7.91-inch height is the smallest profile among the 115V 12000 BTU models.
- You need to cool a large 1250 square foot room GrowthWing 18k BTU 230V Mini Split It provides 18000 BTU capacity and covers up to 1,250 square feet.
- You require independent climate zones for four separate rooms YITAHOME 48000 BTU 4-Zone Mini Split It is a 48000 BTU system with four distinct zones for independent control.
Our 15 picks
Rellytech 12000 BTU 20 SEER2 Mini Split
Best for: 115V circuits and smart control
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12,000 BTU
- Voltage
- 110V/115V
- Coverage Area
- Up to 750 sq ft
- Heat Pump
- Heat pump
- Smart Connectivity
- Wi-Fi, voice commands
This Rellytech mini split delivers 12,000 BTU of cooling and heating for spaces up to 750 square feet. It operates on 115V and achieves a 20 SEER2 efficiency rating. The system includes Wi-Fi connectivity for remote control and voice commands. It uses R454B refrigerant and functions in temperatures from -13°F to 122°F. This unit is designed for year-round comfort in residential or commercial settings.
Pros
- 20 SEER2 efficiency rating
- 12,000 BTU cooling capacity
- Wi-Fi and voice control
- R454B refrigerant
Cons
- Limited to 115V power connection
- Coverage area capped at 750 sq ft
- Power cord not included in kit
Good fit if
- You need a 115V unit for existing circuits
- You want smart control via Wi-Fi
- You are cooling a room up to 750 sq ft
Skip if
- You require 230V power
- You need to cool more than 750 sq ft
- You want a unit with an included power cord
Verdict: Rellytech 12000 BTU 20 SEER2 Mini Split fits users with 115V outlets who need smart features for medium-sized rooms.
YITAHOME 12000 BTU 115V Mini Split
Best for: small rooms needing 115V power
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12,000 BTU
- Coverage Area
- 750 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa
- Voltage
- 115V
This YITAHOME mini split offers 12,000 BTU cooling and heating with a 20 SEER2 efficiency rating. It operates on 115V power and covers up to 750 square feet. The unit includes WiFi connectivity and Alexa support for remote control. It runs quietly at under 41 dB and provides five operating modes. This model is suitable for bedrooms or small living spaces where energy efficiency and smart features are priorities.
Pros
- 20 SEER2 efficiency rating for energy savings
- 115V electrical connection for standard outlets
- WiFi and Alexa smart control compatibility
- Quiet operation at under 41 dB
Cons
- Limited to 750 square feet coverage area
- No 208/230V high-voltage option available
- Heavier indoor unit at 22 pounds
Good fit if
- You need a 12000 BTU unit for a room up to 750 sq ft
- You require 115V power for easy installation
- You want smart control via WiFi or Alexa
Skip if
- You need to cool a space larger than 750 sq ft
- You require 208/230V high-voltage electrical support
- You prefer a lighter indoor unit under 20 pounds
Verdict: YITAHOME 12000 BTU 20 SEER2 Mini Split delivers solid efficiency and smart features for small rooms. It fits users who need 115V power and quiet operation. This model is a practical pick for spaces up to 750 sq ft.
COSTWAY 12000 BTU 115V Mini Split
Best for: Small rooms needing quiet, standard voltage cooling
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU
- Voltage
- 115V
- Coverage Area
- up to 750 sq ft
- Dimensions
- 11.5 × 31.2 × 7.91 inches
- Weight
- 17.6 pounds
This COSTWAY mini split delivers 12,000 BTU of cooling and 12,300 BTU of heating for spaces up to 750 square feet. It operates on standard 115V power and achieves a 20 SEER2 efficiency rating. The unit includes 4D airflow, a 23 dB quiet mode, and a 137°F self-cleaning function. It suits homeowners seeking reliable year-round climate control with easy maintenance and low noise levels.
Pros
- 20 SEER2 cooling efficiency rating
- Standard 115V electrical connection
- Ultra-quiet 23 dB operation
- 137°F self-cleaning function
- 4D airflow swing capability
Cons
- Smaller 12,000 BTU capacity limits coverage to 750 sq ft
- Lower 8.5 HSPF2 heating efficiency compared to higher-end models
- No Wi-Fi or smart home integration listed
Good fit if
- You need a unit for a single room under 750 sq ft
- You have only a 115V outlet available
- You prioritize quiet operation and easy maintenance
Skip if
- You require Wi-Fi connectivity for app control
- You need to cool a large open space over 750 sq ft
- You want higher heating efficiency than 8.5 HSPF2
Verdict: COSTWAY 12000 BTU 115V Mini Split is a solid choice for small rooms where standard voltage and quiet operation matter most. It offers efficient cooling and reliable heating without the complexity of smart features.
ROVSUN 9000 BTU 20 SEER2 Mini Split
Best for: small rooms needing 115V power
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 9000 BTU
- Voltage
- 115V
- Coverage Area
- Up to 400 sq.ft.
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, App, Alexa, Google Assistant
This ROVSUN unit offers 9000 BTU of cooling and heating for spaces up to 400 square feet. It operates on 115V power and achieves a 20 SEER2 efficiency rating. You get smart connectivity via Wi-Fi, app control, and compatibility with Alexa and Google Assistant. The indoor unit runs as quietly as 28dB in mute mode. It is a practical option for smaller rooms where energy efficiency and remote control are priorities.
Pros
- 20 SEER2 efficiency rating for energy savings
- Wi-Fi, app, and voice control support
- Ultra-quiet 28dB operation in mute mode
- Works with Alexa and Google Assistant
Cons
- 9000 BTU capacity is lower than most 12000 BTU picks on this list
- Smaller coverage area of up to 400 sq.ft
- Requires professional installation and extra power cord
Good fit if
- You need a 115V unit for smaller spaces
- You want smart home integration with voice assistants
- You prioritize quiet operation for bedrooms or offices
Skip if
- You require more than 9000 BTU of cooling power
- You are cooling a room larger than 400 square feet
- You prefer a 230V system for higher capacity
Verdict: ROVSUN 9000 BTU Mini Split is a compact, efficient choice for small rooms. It fits buyers who need 115V power and smart features but do not require the higher output of 12000 BTU models.
COSTWAY Blast Pro 18000 BTU 230V
Best for: large rooms with 230V power
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 18,000 BTU
- Voltage
- 208/230V
- Coverage Area
- Up to 1250 sq.ft.
- Heat Pump
- Heat pump
- Smart Connectivity
- Wi-Fi, App, Alexa, Google Assistant
This 18,000 BTU mini split delivers 20 SEER2 efficiency on 208/230V power. It covers up to 1250 sq.ft. with 28 dB indoor operation. The unit includes Wi-Fi, app control, and voice assistant compatibility. You get 7 modes and 8 fan speeds. The outdoor unit operates in extreme temperatures from -4℉ to 127℉.
Pros
- 20 SEER2 energy efficiency rating
- 28 dB indoor noise level
- Wi-Fi and voice control support
- Operates down to -4℉
Cons
- Requires 208/230V electrical circuit
- 18000 BTU capacity exceeds 12000 BTU standard
- Indoor unit is 35.8 inches wide
Good fit if
- You have a 230V outlet installed
- You need to cool a large room up to 1250 sq.ft.
- You want smart home integration via app or voice
Skip if
- You only have standard 115V outlets
- You are cooling a small space under 500 sq.ft.
- You prefer a more compact indoor unit under 30 inches
Verdict: COSTWAY Blast Pro 18000 BTU 230V is a high-capacity option for large rooms with 230V wiring. It suits users who need strong cooling power and smart controls.
Temprium 12000 BTU 230V Mini Split
Best for: 230V circuits and quiet operation
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU
- Voltage
- 230V
- Coverage Area
- Up to 1250 sq. ft.
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa, Google Assistant
This Temprium unit delivers 12,000 BTU of cooling and heating with a 20 SEER2 efficiency rating. It operates on a 230V circuit, which is distinct from the 115V options found in many other picks. The system covers spaces up to 1,250 square feet and includes WiFi connectivity for app and voice control. It offers seven operating modes and seven fan speeds for precise adjustment.
Pros
- 20 SEER2 efficiency rating for energy savings
- 230V power requirement for stable operation
- WiFi enabled with Alexa and Google Assistant support
- Low noise level of 28 dB in quiet mode
- Covers up to 1,250 square feet
Cons
- Requires a 230V electrical circuit, not standard 115V
- Cooling capacity listed as 12,000 BTU in specs despite higher claims
- Indoor unit width of 30 inches is bulkier than some competitors
Good fit if
- You have a dedicated 230V circuit available
- You want WiFi control without relying on a separate hub
- You need quiet operation for a bedroom or office
Skip if
- You only have standard 115V outlets
- You need a unit smaller than 12,000 BTU
- You prefer a more compact indoor unit design
Verdict: Temprium 12000 BTU 230V Mini Split suits users with 230V wiring who prioritize high efficiency and smart features. It is a solid choice for larger rooms where quiet operation matters.
Della Vario 9000 BTU Mini Split
Best for: small rooms with 230V power
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 9000 BTU/h (0.75 Ton)
- Voltage
- 208-230V
- Coverage Area
- up to 400 Sq. Ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Alexa, WiFi, DELLA app
The Della Vario Series offers 9,000 BTU cooling and heating for rooms up to 400 square feet. It runs on 208-230V power and achieves a 20 SEER2 efficiency rating. This unit includes smart Wi-Fi and Alexa connectivity, plus a 29 dBA quiet operation mode. It is designed for smaller spaces where precise temperature control and energy savings are priorities.
Pros
- 20 SEER2 efficiency rating for energy savings
- Wi-Fi and Alexa smart home compatibility
- Ultra-quiet 29 dBA operation level
- 4D air flow for even distribution
Cons
- 9,000 BTU capacity is too small for large rooms
- Requires 208-230V electrical circuit, not standard 115V
- Limited coverage area of up to 400 square feet
Good fit if
- You need to cool a small room under 400 square feet
- You have a 208-230V electrical outlet available
- You want smart app and voice control features
Skip if
- You require a 115V plug-in unit
- You need to cool a space larger than 400 square feet
- You prefer a higher 23 SEER2 efficiency rating
Verdict: Della Vario 9000 BTU Mini Split fits small rooms with 230V power, offering quiet, smart-controlled comfort at 20 SEER2 efficiency.
YITAHOME 12000 BTU 115V Mini Split
Best for: Standard 115V outlets in rooms up to 750 sq. ft.
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU
- Voltage
- 115V
- Coverage Area
- Up to 750 Sq. Ft
- Heat Pump
- Heat Pump
- Dimensions
- 8.1 × 31.7 × 10.6 inches
This YITAHOME unit delivers 12,000 BTU of cooling and heating at 20 SEER2 efficiency. It runs on standard 115V power and covers up to 750 square feet. The system includes a heat pump, inverter technology, and operates below 41 decibels. It features five modes, including a dedicated health function for air quality. This model is designed for single-room applications where standard electrical outlets are available.
Pros
- 20 SEER2 efficiency rating for energy savings
- Runs on standard 115V household power
- Covers areas up to 750 square feet
- Operates quietly with noise below 41 decibels
- Includes health mode for negative ions and dust removal
Cons
- Limited to 115V voltage, requiring a standard outlet
- Does not include built-in Wi-Fi connectivity
- Excludes left and right swing modes for airflow
Good fit if
- You need a 115V unit for a 750 sq. ft. room
- You want high efficiency without complex wiring
- You prefer silent operation below 41 decibels
Skip if
- You require Wi-Fi control for remote access
- You need multi-directional airflow with left-right swing
- You have a space larger than 750 square feet
Verdict: YITAHOME 12000 BTU 115V Mini Split is a practical choice for single-room cooling and heating where standard 115V power is available. It suits users who prioritize energy efficiency and quiet operation over smart connectivity features.
YITAHOME 12000 BTU 115V Mini Split
Best for: single rooms with standard 115V outlets
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU
- Voltage
- 115V
- Coverage Area
- up to 750 sq. ft.
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi
This YITAHOME mini split delivers 12,000 BTU of cooling and heating with a 20 SEER2 efficiency rating. It runs on standard 115V power, making it suitable for spaces up to 750 square feet. The unit includes WiFi connectivity for remote control and operates quietly at 25 dB in sleep mode. You get four fan speeds and six operating modes to manage comfort. It is a practical option for single-room climate control.
Pros
- 20 SEER2 efficiency rating for energy savings
- 115V electrical requirement for easy installation
- WiFi smart control and remote access
- Quiet operation down to 25 dB in sleep mode
- Covers areas up to 750 square feet
Cons
- Limited to 115V voltage, excluding 208/230V compatibility
- No mention of included shut-off valves in the package
- Requires professional HVAC installation
Good fit if
- You need a 12,000 BTU unit for a room under 750 sq. ft.
- You have a standard 115V outlet available
- You want WiFi control for remote adjustments
Skip if
- You require 208/230V power connections
- You need to cool a space larger than 750 sq. ft.
- You prefer a plug-and-play setup without professional installation
Verdict: YITAHOME 12000 BTU 20 SEER2 Mini Split is a solid choice for homeowners with standard 115V outlets who need efficient cooling for a single room. It fits well if you value quiet operation and smart features over high-voltage compatibility.
DELLA Motto 12K BTU 115V
Best for: Standard 115V rooms up to 550 sq. ft.
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU/h
- Voltage
- 115V
- Coverage Area
- up to 550 sq. ft.
- Heat Pump
- Heat pump
- Smart Connectivity
- Alexa and Wifi
The DELLA Motto Series delivers 12,000 BTU of cooling and heating at 20 SEER2 efficiency on a standard 115V circuit. It covers up to 550 square feet using R-32 refrigerant. Smart features include Wi-Fi connectivity and Alexa support. The indoor unit operates at 27 dBA and offers 4D airflow. This model suits you if you need a reliable, efficient mini split for a single room.
Pros
- 20 SEER2 efficiency rating for lower energy use
- 115V plug-in compatibility for easy installation
- Wi-Fi and Alexa smart control integration
- Ultra-quiet operation at 27 dBA
- 4D airflow for precise temperature distribution
Cons
- Limited to 550 square feet coverage area
- Indoor unit measures 31.2 inches wide
- Requires line-set vacuuming during installation
Good fit if
- You need a 115V unit for a standard outlet
- You want smart control via Alexa or Wi-Fi
- You are cooling a room up to 550 sq. ft.
Skip if
- You require a 230V connection for higher power
- You need to cool a space larger than 550 sq. ft.
- You prefer a unit with a built-in smart sensor at the indoor unit
Verdict: DELLA Motto 12K BTU 115V provides solid 20 SEER2 efficiency and smart connectivity for standard 115V circuits. It fits well in rooms up to 550 square feet where quiet operation and app control matter.
YITAHOME 48000 BTU 4-Zone Mini Split
Best for: Multi-room cooling with independent zone control
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 48000 BTU
- Smart Connectivity
- WiFi
- Voltage
- 115V
- Smart Control
- Wi-Fi
- Dimensions
- 10.4 × 34 × 13.1 inches
This YITAHOME system delivers 48000 BTU of cooling across four zones. It uses a 12000 BTU * 4 configuration with a 20 SEER2 efficiency rating. The unit operates on 115V and includes WiFi connectivity for remote control. You get three indoor air handlers and one outdoor condenser. This setup allows independent temperature control for each room. It is designed for larger spaces requiring multi-zone climate management.
Pros
- High 20 SEER2 efficiency rating for energy savings
- 48000 BTU total capacity across four zones
- WiFi smart control for remote management
- Independent cooling and heating per room
- Quiet operation down to 25 decibels in sleep mode
Cons
- Heavy 282-pound unit requires professional installation
- Large 34-inch outdoor condenser footprint
- Complex setup with eight shipping cartons
Good fit if
- You need to cool four separate rooms simultaneously
- You want independent temperature control for each zone
- You have a 115V electrical circuit available
Skip if
- You only need to condition a single room
- You cannot support a 282-pound outdoor unit
- You prefer a simpler single-zone installation
Verdict: YITAHOME 48000 BTU 4-Zone Mini Split is a high-capacity solution for homes needing four distinct climate zones. It suits buyers who value independent room control and high efficiency over single-unit simplicity.
Rellytech 12000 BTU 115V Mini Split
Best for: small rooms needing 115V smart cooling
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12000 BTU
- Voltage
- 110/115V
- Coverage Area
- up to 750 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, Voice control, Smartphone
This Rellytech mini split delivers 12,000 BTU of cooling and heating for spaces up to 750 square feet. It operates on standard 115V power and achieves a 20 SEER2 efficiency rating. You get smart control via Wi-Fi and voice commands, along with a remote. The unit uses R454B refrigerant and functions in temperatures from -13°F to 122°F. It includes modes like turbo and sleep for precise comfort management.
Pros
- 20 SEER2 efficiency rating for strong energy performance
- 115V voltage suitable for standard household circuits
- Wi-Fi and voice control for remote management
- Operates in extreme temperatures from -13°F to 122°F
- Uses R454B refrigerant for better air quality
Cons
- Limited to 750 square foot coverage area
- No 230V high-voltage option listed for this specific model
- Does not mention 240V compatibility for commercial use
Good fit if
- You need a 115V unit for a bedroom or small room
- You want smart app control without extra hubs
- You require heating performance in cold climates down to -13°F
Skip if
- You need to cool a space larger than 750 square feet
- You require a 230V or 240V electrical connection
- You prefer a unit without Wi-Fi connectivity
Verdict: Rellytech 12000 BTU 115V Mini Split offers solid 20 SEER2 efficiency and smart features for small rooms. It fits homeowners with standard 115V outlets who need reliable heating in cold weather.
DELLA Vita 12K BTU 115V Mini Split
Best for: small rooms needing quiet, efficient cooling
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12,000 BTU (1 Ton)
- Voltage
- 115V
- Coverage Area
- Up to 550 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, Alexa, Google Assistant, App
The DELLA Vita Series offers 12,000 BTU cooling and heating at 20 SEER2 efficiency on a standard 115V circuit. It covers up to 550 square feet and operates quietly at 28 dB. Smart features include Wi-Fi, app control, and an "I Feel" sensor that reads temperature at the remote. This unit is built for small rooms where stable comfort and low noise matter more than raw power.
Pros
- 20 SEER2 efficiency rating for energy savings
- Ultra-quiet operation at 28 dB
- "I Feel" sensor adjusts based on remote location
- Works with Alexa and Google Assistant
Cons
- Limited to 115V circuits, not 230V
- Smaller 550 sq ft coverage area
- Heating performance drops in extreme cold
Good fit if
- You need a 115V unit for standard outlets
- You are cooling a small room under 550 sq ft
- You prioritize quiet operation for bedrooms or offices
Skip if
- You require 230V power for higher capacity
- You need to cool spaces larger than 550 sq ft
- You want a larger 18,000 or 24,000 BTU system
Verdict: DELLA Vita 12K BTU 115V Mini Split is a solid pick for small rooms where quiet operation and smart control matter. It fits users who want 20 SEER2 efficiency without needing a 230V circuit.
GrowthWing 18k BTU 230V Mini Split
Best for: larger rooms with 230V power
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 18,000 BTU
- Voltage
- 208/230V
- Coverage Area
- Up to 1250 Sq.Ft.
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa, App
The GrowthWing AuraCore Series delivers 18,000 BTU of cooling and heating with a 20 SEER2 efficiency rating. It operates on 208/230V power, making it suitable for larger spaces up to 1,250 sq. ft. You get smart control via app and Alexa, plus 4D airflow and I FEEL sensing for targeted comfort. The unit runs quietly at 32dB and includes AutoClean features for easier maintenance.
Pros
- 20 SEER2 efficiency rating for lower energy use
- 18,000 BTU capacity covers up to 1,250 sq. ft.
- 208/230V voltage for higher power efficiency
- Smart control with Wi-Fi and Alexa compatibility
- Quiet operation at 32dB
Cons
- Requires 208/230V electrical connection, not standard 115V
- Heavier build at 88 pounds
- Larger indoor unit dimensions at 35.8 inches wide
Good fit if
- You need to cool or heat a space up to 1,250 sq. ft.
- You have a 208/230V electrical circuit available for installation
- You want smart home integration with Alexa or a dedicated app
Skip if
- You only have standard 115V outlets and cannot install 230V wiring
- You are cooling a small room under 900 sq. ft. and want a more compact unit
- You prefer a lighter, smaller indoor unit for easy mounting
Verdict: GrowthWing 18k BTU 230V Mini Split is a high-capacity, efficient choice for larger rooms where 230V power is available. It fits buyers who prioritize coverage area and smart features over compact size.
ROVSUN 12000 BTU 230V Mini Split
Best for: Medium rooms wired for 230V circuits
- Efficiency Rating
- 20 SEER2 (what this guide is about)
- Cooling Capacity
- 12,000 BTU
- Voltage
- 230V
- Coverage Area
- Up to 550 sq ft
- Heat Pump
- Heat Pump
- Dimensions
- 7.99 × 31.9 × 11.5 inches
This ROVSUN system provides 12,000 BTU of cooling and heating with a 20 SEER2 efficiency rating. It operates on a 230V circuit and covers spaces up to 550 square feet. With sound levels between 28 and 45 dBa and a 4-way airflow swing, it suits you if you need steady climate control in mid-sized rooms.
Pros
- 20 SEER2 efficiency rating with inverter heat pump
- Cooling and heating coverage up to 550 square feet
- Low-noise operation down to 28 dBa in quiet modes
- Four-way directional airflow swing
Cons
- Requires a dedicated 230V electrical connection
- No built-in Wi-Fi or app connectivity listed
- Top-end operational sound level reaches 45 dBa
Good fit if
- You have access to a 230V electrical line.
- You want heating and cooling for an area up to 550 square feet.
- You prefer handheld remote operation with sleep and mute modes.
Skip if
- You only have a standard 115V power supply.
- You want smartphone app control over your system.
- You need to condition spaces larger than 550 square feet.
Verdict: ROVSUN 12000 BTU 230V Mini Split delivers 20 SEER2 climate control for spaces up to 550 square feet that already have 230V wiring.
Specifications side by side
| Spec | Rellytech 12000 BTU 20 SEER2 Mini Split | YITAHOME 12000 BTU 115V Mini Split | COSTWAY 12000 BTU 115V Mini Split | ROVSUN 9000 BTU 20 SEER2 Mini Split | COSTWAY Blast Pro 18000 BTU 230V | Temprium 12000 BTU 230V Mini Split | Della Vario 9000 BTU Mini Split | YITAHOME 12000 BTU 115V Mini Split | YITAHOME 12000 BTU 115V Mini Split | DELLA Motto 12K BTU 115V | YITAHOME 48000 BTU 4-Zone Mini Split | Rellytech 12000 BTU 115V Mini Split | DELLA Vita 12K BTU 115V Mini Split | GrowthWing 18k BTU 230V Mini Split | ROVSUN 12000 BTU 230V Mini Split |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cooling Capacity | 12,000 BTU | 12,000 BTU | 12000 BTU | 9000 BTU | 18,000 BTU | 12000 BTU | 9000 BTU/h (0.75 Ton) | 12000 BTU | 12000 BTU | 12000 BTU/h | 48000 BTU | 12000 BTU | 12,000 BTU (1 Ton) | 18,000 BTU | 12,000 BTU |
| Efficiency Rating | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2, 19 SEER | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 | 20 SEER2 |
| Voltage | 110V/115V | not specified | 115V | 115V | 208/230V | 230V | 208-230V | 115V | 115V | 115V | not specified | 110/115V | 115V | 208/230V | 230V |
| Coverage Area | Up to 750 sq ft | 750 sq ft | up to 750 sq ft | Up to 400 sq.ft. | Up to 1250 sq.ft. | Up to 1250 sq. ft. | up to 400 Sq. Ft | Up to 750 Sq. Ft | up to 750 sq. ft. | up to 550 sq. ft. | not specified | up to 750 sq ft | Up to 550 sq ft | Up to 1250 Sq.Ft. | Up to 550 sq ft |
| Heat Pump | Heat pump | Heat Pump | not specified | Heat Pump | Heat pump | Heat Pump | Heat Pump | Heat Pump | Heat Pump | Heat pump | not specified | Heat Pump | Heat Pump | Heat Pump | Heat Pump |
| Smart Connectivity | Wi-Fi, voice commands | WiFi, Alexa | not specified | Wi-Fi, App, Alexa, Google Assistant | Wi-Fi, App, Alexa, Google Assistant | WiFi, Alexa, Google Assistant | Alexa, WiFi, DELLA app | not specified | WiFi | Alexa and Wifi | WiFi | Wi-Fi, Voice control, Smartphone | Wi-Fi, Alexa, Google Assistant, App | WiFi, Alexa, App | not specified |
| Smart Control | Wi-Fi | Wi-Fi | not specified | Wi-Fi | Wi-Fi | not specified | Wi-Fi, Alexa | not specified | Wi-Fi | Wi-Fi, Alexa | Wi-Fi | Wi-Fi | Wi-Fi, Alexa | Wi-Fi, Alexa | not specified |
| Dimensions | 11.4 × 31.9 × 8.7 inches | 7.9 × 31.2 × 11.5 inches | 11.5 × 31.2 × 7.91 inches | 7.99 × 31.9 × 11.5 inches | 7.68 × 35.8 × 12 inches | 7.87 × 30 × 11.6 inches | 8 × 31.9 × 11.5 inches | 8.1 × 31.7 × 10.6 inches | 10.4 × 34 × 13.1 inches | 7.9 × 31.2 × 11.5 inches | 10.4 × 34 × 13.1 inches | 11.4 × 31.9 × 8.66 inches | 7.48 × 31.9 × 12 inches | 8.11 × 35.8 × 11.6 inches | 7.99 × 31.9 × 11.5 inches |
| Weight | 75.3 pounds | 22 pounds | 17.6 pounds | 70 pounds | 20.9 pounds | 40.8 pounds | 19.8 pounds | 75.1 pounds | 70.5 pounds | not specified | 282 pounds | 75.3 pounds | 18.7 pounds | 88 pounds | 70 pounds |
| Size | 12000BTU,115V,20 SEER2-WiFi | not specified | 12000BTU, 115V, 20 SEER2 | 8.07"D x 31.92"W x 11.49"H | not specified | 12,000 BTU, 230V, 20 SEER2 | 9,000 BTU - 230V / 20 SEER2 | 12000 BTU 115V / 20 SEER2 | not specified | 12,000 BTU - 115V - 20 SEER2 | not specified | 12000BTU,115V,20 SEER2,WiFi | 12,000 BTU - 115V / 20 SEER2 | 18000 BTU 208/230V | 12,000 BTU, 230V, 20 SEER2 |
| Color | White | White | White | White | White | White | White | White | White | White | White | White | White | White | White |
| Model | CE0-1 | MAYIH4qu0k | 11090-CYFP | RV09T1/20-I/RV09T1/20-O | Blast Pro | SAC002-A-12KWH-US | TL-9K2VB-20S-I+O | MAYIHXi5W5 | MAYIHhC07e | 12K1VRH-20S-JA-I+O | MAYIHX84u9 | CE0-2 | TC-12K1VR-20S-I+O | HP12N | AC-W-12K-230V |
Is 20 SEER2 Worth the Upgrade?
Twenty SEER2 measures cooling efficiency under new federal standards. Higher numbers mean less electricity for the same cooling output. You see this rating on every unit in this list, from 9000 BTU to 48000 BTU models. This efficiency level reduces runtime for your compressor. It helps keep operating costs lower over time. The feature matters most if you run the unit frequently. It is less critical for occasional use in mild climates.
Worth it if
- You run the AC daily during hot summers
- You want to minimize long-term electricity usage
- You plan to keep the unit for many years
Skip it if
- You only need cooling for a few weeks a year
- You have a very tight upfront budget
- You rarely use the air conditioner
How we selected these picks
We identified products by scanning Amazon listings for the 20 SEER2 efficiency rating in titles or feature lists. Only listings that explicitly state this spec were included. We reviewed the published specifications to verify the rating and ensure accuracy. We do not test units ourselves. All details come directly from the manufacturer data provided on each product page.
The 15 models are ordered by availability first. Next, we sort by the listing's overall rating weighted by review count. Finally, we prioritize how many of our core criteria the specs meet. We show only one variant per product family. This method ensures you see the most relevant, highly-rated options that match your efficiency needs.
How to choose the right mini split
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Match voltage to your circuit
Check your outlet type before buying. Most units here use 115V, fitting standard household outlets. Models like the Rellytech 12000 BTU 20 SEER2 Mini Split or the YITAHOME 12000 BTU 115V Mini Split work with these common circuits. Others require 230V for higher capacity, such as the COSTWAY Blast Pro 18000 BTU 230V. Using the wrong voltage prevents installation. Verify your existing wiring matches the unit's spec to avoid costly electrical upgrades or compatibility issues.
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Verify coverage area needs
Size the unit to your room dimensions. The YITAHOME 12000 BTU 115V Mini Split covers up to 750 square feet, making it suitable for larger single rooms. The DELLA Motto 12K BTU 115V handles spaces up to 550 square feet. The GrowthWing 18k BTU 230V Mini Split targets larger areas up to 1,250 square feet. Choosing the right BTU output ensures efficient cooling without overworking the compressor. Match the spec to your square footage for optimal performance.
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Check smart control features
Determine if you need app connectivity. Many units, including the Rellytech 12000 BTU 20 SEER2 Mini Split and YITAHOME 12000 BTU 115V Mini Split, offer Wi-Fi control. The DELLA Vario 9000 BTU Mini Split adds Alexa compatibility. If you prefer simplicity, the COSTWAY 12000 BTU 115V Mini Split provides efficient cooling without smart features. Decide if remote scheduling and monitoring are essential for your routine before selecting a model.
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Consider zone control requirements
Decide if you need single or multi-room cooling. Most picks are single-zone units for one room. The YITAHOME 48000 BTU 4-Zone Mini Split supports four distinct climate zones. This high-capacity solution suits homes needing independent room control. Single-zone units are simpler to install and manage. If you only need to cool one space, stick to standard models. Multi-zone systems offer flexibility but require more complex setup and wiring.
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Evaluate indoor unit size
Measure your wall space for the indoor unit. Heights vary significantly among models. The COSTWAY 12000 BTU 115V Mini Split has a compact 7.91-inch height. The YITAHOME 12000 BTU 115V Mini Split (position 9) stands 13.1 inches tall. Widths also differ, with some models reaching 35.8 inches. Ensure the physical dimensions fit your intended mounting location. Check the width, height, and length specs to avoid installation conflicts with furniture or windows.
Frequently asked questions
Can I install a 20 SEER2 mini split on a standard 115V outlet?
Yes, many models support 115V circuits. The Rellytech 12000 BTU and YITAHOME 12000 BTU units both run on 115V power. These are ideal for rooms up to 750 square feet. They fit standard household outlets. You do not need specialized high-voltage wiring for these specific picks.
Which 20 SEER2 mini split is best for a large room?
The GrowthWing 18k BTU 230V Mini Split covers up to 1,250 square feet. It uses 230V power for higher capacity. The COSTWAY Blast Pro 18000 BTU is another strong option for large spaces. Both offer 20 SEER2 efficiency and smart control features for larger areas.
Do all 20 SEER2 mini splits have Wi-Fi connectivity?
No, not all models include smart features. The COSTWAY 12000 BTU 115V Mini Split and the ROVSUN 12000 BTU 230V Mini Split lack Wi-Fi. Most other picks, including the Rellytech and YITAHOME models, offer Wi-Fi control. Check the attributes list to confirm connectivity before buying.
What is the difference between 115V and 230V mini splits?
Voltage determines the power source and capacity. 115V units plug into standard outlets and suit smaller rooms. 230V models require dedicated high-voltage circuits and handle larger spaces. The Temprium 12000 BTU 230V and GrowthWing 18k BTU 230V are examples of higher-voltage options. Match the voltage to your home wiring.
Which 20 SEER2 mini split is the quietest?
The YITAHOME 12000 BTU 115V Mini Split (position 2) is noted for quiet operation. The COSTWAY 12000 BTU 115V Mini Split also prioritizes quiet performance. The Temprium 12000 BTU 230V Mini Split is another solid choice for users who value low noise levels in their living space.
Can one mini split cool multiple rooms?
Yes, multi-zone systems can cool several areas. The YITAHOME 48000 BTU 4-Zone Mini Split allows independent control for four distinct climate zones. This high-capacity unit suits homes needing multiple cooling areas. Single-zone models only control one room. Choose a multi-zone unit for whole-home comfort.
What size mini split do I need for a 550 sq ft room?
A 12000 BTU unit is suitable for a 550 square foot room. The DELLA Motto 12K BTU 115V and DELLA Vita 12K BTU 115V Mini Splits are rated for this coverage. Both offer 20 SEER2 efficiency. They fit standard 115V circuits and provide smart control options for your space.