COSTWAY 12 Alternatives: 6 Similar Picks Compared
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The COSTWAY 12,000 BTU Mini Split offers 21 SEER2 efficiency and 1-ton heat pump capacity for rooms up to 750 sq.ft. If you are researching costway 12 alternatives, you may need different specs for your space. This unit requires 230V power and uses R32 refrigerant for eco-friendly operation. Its 353 CFM airflow and self-cleaning function add practical value for year-round comfort.
You might want something else if your room is smaller than 750 sq.ft. or if you need Wi-Fi smart control. The alternatives listed here were chosen because their specs overlap with the original. Some offer higher BTU capacity for larger areas. Others provide smart connectivity for remote management. Each pick shares the high 21 SEER2 efficiency rating. You can compare voltage requirements and physical dimensions to find the best fit. This list covers 6 similar picks with verified data.
Our top pick: COSTWAY 12,000 BTU 21 SEER2 Mini Split.
How each alternative compares
Rellytech 18k BTU 21 SEER2 Mini Split
The Rellytech 18,000 BTU model offers 50% more cooling capacity than the COSTWAY 12K. It matches the 21 SEER2 efficiency rating but targets larger rooms. You gain significant airflow for bigger spaces but lose the compact indoor unit size. The outdoor unit is much heavier at 95.1 pounds. It includes Wi-Fi smart control, which the COSTWAY remote lacks. This unit is best if your room exceeds 750 sq.ft. and you need robust cooling. It requires the same 230V power connection. Choose this if raw capacity matters more than a smaller footprint.
COSTWAY 9000 BTU Mini Split 21 SEER2
This COSTWAY 9,000 BTU unit reduces cooling power by 25% compared to the 12K model. It retains the 21 SEER2 efficiency and 230V requirement. The key difference is the addition of Wi-Fi smart control, replacing the standard remote. The indoor unit is slightly taller at 12.1 inches. It is designed for smaller rooms where 12,000 BTU is too much. You get smart connectivity but sacrifice cooling speed for larger areas. This pick suits users who prioritize app control and energy efficiency in compact spaces over high output.
TOSOT 33,600 BTU 21 SEER2 Mini Split
The TOSOT 33,600 BTU model provides nearly triple the cooling capacity of the COSTWAY 12K. It maintains the 21 SEER2 efficiency rating and uses R32 refrigerant. The unit is significantly larger, weighing 181 pounds. It includes Wi-Fi smart control for remote management. This is a premium choice for large commercial or open-plan spaces. You gain massive cooling power but require professional installation and ample wall space. The indoor unit is wider and taller. Choose this if your room needs high capacity and you want integrated smart features.
Della Vario 24K BTU 21 SEER2
The Della Vario 24,000 BTU unit doubles the cooling capacity of the COSTWAY 12K. It matches the 21 SEER2 efficiency and 230V power requirement. It features Wi-Fi and Alexa smart control, offering more integration options than the standard remote. The indoor unit is wider at 46.9 inches. This model suits large rooms needing strong performance. You gain smart home compatibility and higher output but need more installation space. It is ideal for users who want voice control and robust cooling in a single unit.
YITAHOME 18,000 BTU 21 SEER2 Mini Split
The YITAHOME 18,000 BTU model offers 50% more cooling than the COSTWAY 12K. It shares the 21 SEER2 efficiency rating and 230V power need. It includes Wi-Fi smart control, unlike the basic remote. The unit is heavier at 98 pounds. This option is best for larger rooms requiring efficient, high-capacity cooling. You gain smart connectivity and increased BTU but sacrifice the compact size of the 12K model. It fits users who value quiet operation and app control in medium to large spaces.
YITAHOME 12000 BTU 21 SEER2 Mini Split
The YITAHOME 12,000 BTU model matches the cooling capacity and 21 SEER2 efficiency of the COSTWAY 12K. It requires the same 230V power. The main difference is the inclusion of Wi-Fi smart control. The indoor unit dimensions are nearly identical, with a slight height difference. This unit is best for users who want the same capacity but prefer app-based control over a standard remote. You gain smart features without changing the cooling performance. It is a direct alternative for those prioritizing connectivity in a medium-sized room.
Quick picks
Our 7 picks
COSTWAY 12,000 BTU 21 SEER2 Mini Split
Best for: Moderate rooms needing high SEER2 efficiency
- Cooling Capacity
- 12,000 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 750 sq ft
- Heat Pump
- Heat Pump
- Dimensions
- 8 × 30 × 11.5 inches
This COSTWAY unit delivers 12,000 BTU of cooling and 12,300 BTU of heating for spaces up to 750 square feet. It operates on 208-230V power with a 21 SEER2 efficiency rating. The system includes a heat pump, self-cleaning function, and a 24-hour timer. It uses R32 refrigerant and features a 4D airflow design. This model suits you if you need a reliable, efficient split system for moderate-sized rooms.
Pros
- High 21 SEER2 energy efficiency rating
- Includes 24-hour timer and sleep mode
- Built-in self-cleaning function at 135°F
- Pre-charged with eco-friendly R32 refrigerant
- Covers areas up to 750 square feet
Cons
- Smaller 12,000 BTU capacity than 18K or 24K alternatives
- Heavier indoor unit at 17.5 pounds
- Limited to 208-230V voltage range
Good fit if
- You need efficient cooling for a room under 750 sq.ft.
- You prefer a unit with a self-cleaning function
- You have a 208-230V electrical setup
Skip if
- You require a larger 18,000 BTU or 24,000 BTU unit
- You need a 115V standard outlet connection
- You want a smaller, lighter indoor unit
Verdict: COSTWAY 12K BTU 21 SEER2 Mini Split is a solid choice for homeowners seeking high efficiency in a moderate-capacity unit. It fits best in rooms where 12,000 BTU is sufficient and 208-230V power is available.
Rellytech 18k BTU 21 SEER2 Mini Split
Best for: larger rooms with 230V power connections
- Cooling Capacity
- 18000 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208V/230V
- Coverage Area
- up to 1250sq.ft
- Heat Pump
- Heat Pump
- Smart Control
- Wi-Fi
This Rellytech mini split delivers 18,000 BTU of cooling and heating for spaces up to 750 square feet. It runs on 208V/230V power and achieves a 21 SEER2 efficiency rating. You get Wi-Fi control, voice commands, and a remote with a digital display. The unit uses R454B refrigerant and operates between -13°F and 122°F. It includes an 8-year warranty and comes with a full installation kit for licensed technicians.
Pros
- 21 SEER2 efficiency rating for strong energy performance
- 18,000 BTU capacity suitable for areas up to 750 sq ft
- Wi-Fi and voice command smart control capabilities
- Operates in extreme temperatures from -13°F to 122°F
- Includes a remote with a digital display
Cons
- Requires 208V/230V power, which may not suit all standard outlets
- Heavier at 95.1 pounds, making handling more difficult
- Must be installed by a licensed HVAC technician
Good fit if
- You need higher capacity cooling for larger rooms up to 750 sq ft
- You have 230V electrical connections available
- You want smart control via Wi-Fi and voice commands
Skip if
- You only have standard 115V outlets available
- You prefer a unit under 750 BTU capacity
- You want to handle the installation yourself without a professional
Verdict: Rellytech 18,000 BTU 21 SEER2 Mini Split is a high-capacity option for users with 230V power who need robust cooling for larger spaces. It fits well in areas requiring strong performance and smart connectivity.
COSTWAY 9000 BTU Mini Split 21 SEER2
Best for: small rooms with 230V power
- Cooling Capacity
- 9000 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208/230V
- Coverage Area
- Up to 450 Sq. Ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa, Google Assistant, App
This 9000 BTU mini split handles spaces up to 450 sq.ft. with a 21 SEER2 efficiency rating. It runs on 208/230V power and includes Wi-Fi for app or voice control via Alexa and Google Assistant. The unit offers 4D airflow, seven modes, and operates as low as 28 dB. It is a compact, efficient option for smaller rooms or zones where lower cooling capacity is sufficient.
Pros
- 21 SEER2 efficiency rating for energy savings
- Wi-Fi connectivity with app and voice control
- Operates quietly at 28 dB
- 4D airflow design for even distribution
- Heats reliably down to -4°F
Cons
- 9000 BTU capacity is lower than most competitors
- Requires 208/230V electrical connection
- Smaller coverage area of 450 sq.ft.
Good fit if
- You need a compact unit for a small room
- You have existing 230V wiring available
- You want smart app control and quiet operation
Skip if
- You need to cool a large open space
- You only have standard 115V outlets
- You require higher than 9000 BTU cooling power
Verdict: COSTWAY 9000 BTU Mini Split is a quiet, efficient choice for small rooms where 230V power is available. It fits users who prioritize smart features and low noise over raw cooling capacity.
TOSOT 33,600 BTU 21 SEER2 Mini Split
Best for: large spaces needing high capacity cooling
- Cooling Capacity
- 33,600 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208-230V
- Heat Pump
- Heating System
- Smart Connectivity
- Wi-Fi, GREE+ app, voice control
- Dimensions
- 39.4 × 29.4 × 16.8 inches
This TOSOT unit delivers 33,600 BTU of cooling with a 21 SEER2 efficiency rating. It operates on 230V power and includes Wi-Fi connectivity for app control via GREE+. The system features inverter technology for stable performance in extreme temperatures. It comes with a 16 ft line set and essential installation accessories. The indoor unit weighs 181 pounds and measures 39.4 inches in length. This model suits larger spaces needing robust climate control.
Pros
- High 33,600 BTU cooling capacity for large rooms
- 21 SEER2 efficiency rating for lower energy use
- Wi-Fi enabled with GREE+ app and voice control support
- Includes 16 ft copper line set and installation accessories
- Quiet operation ranging from 22dB to 36dB
Cons
- Large 181-pound indoor unit requires sturdy mounting
- 230V voltage may need electrical upgrades for 115V homes
- Professional installation is mandatory for proper setup
Good fit if
- You need high cooling capacity for a large open space
- You want smart app control and scheduling features
- You have existing 230V electrical infrastructure
Skip if
- You only have standard 115V outlets available
- You are looking for a lightweight, portable unit
- You prefer a smaller 9,000 or 12,000 BTU system
Verdict: TOSOT 33,600 BTU Mini Split offers substantial cooling power and smart features for large areas. It fits buyers who need high capacity and have the necessary electrical setup for professional installation.
Della Vario 24K BTU 21 SEER2
Best for: large rooms needing smart control
- Cooling Capacity
- 24,000 BTU/h (2 Ton)
- Efficiency Rating
- 21 SEER2
- Voltage
- 208–230V
- Coverage Area
- up to 1500 Sq. Ft
- Heat Pump
- Heat pump
- Smart Connectivity
- Wifi, Alexa
This 24,000 BTU unit handles up to 1,500 square feet with 21 SEER2 efficiency. It operates on 230V and includes Wi-Fi and Alexa control. The indoor unit measures 46.9 inches wide and weighs 36.4 pounds. It runs quietly at 36 dBa and works in cold weather down to -4°F. You get precise temperature adjustments and smart airflow features for consistent comfort in larger spaces.
Pros
- 24,000 BTU cooling capacity for large rooms
- 21 SEER2 energy efficiency rating
- Wi-Fi and Alexa smart connectivity
- Operates down to -4°F outdoor temperature
- Quiet 36 dBa operation level
Cons
- Requires professional installation
- Large 46.9-inch indoor unit width
- Limited to 25 ft refrigerant line without adjustment
Good fit if
- You need cooling for a 1,500 square foot area
- You want smart control via Wi-Fi or Alexa
- You live in a climate with cold winters
Skip if
- You prefer a 115V electrical connection
- You have limited wall space for a wide unit
- You want to install the system yourself
Verdict: Della 24k BTU Mini Split, 21 SEER2 suits you if you need high-capacity cooling for a large room and want smart features. It delivers strong performance but requires professional setup and ample wall space.
YITAHOME 18,000 BTU 21 SEER2 Mini Split
Best for: larger rooms with 208-230V power
- Cooling Capacity
- 18000 BTU (1.5 Ton)
- Efficiency Rating
- 21 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 1250 Sq. Ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa
This YITAHOME unit delivers 18,000 BTU of cooling and heating with a 21 SEER2 efficiency rating. It runs on 208-230V power and covers up to 1,250 square feet. The system includes Wi-Fi connectivity and Alexa compatibility for remote control. It operates quietly with noise levels below 49 decibels. This model is suitable for larger rooms or open-plan living spaces that require robust climate control.
Pros
- 21 SEER2 efficiency rating for energy savings
- 18,000 BTU cooling and heating capacity
- Wi-Fi and Alexa smart connectivity
- Quiet operation below 49 decibels
Cons
- Limited to 208-230V voltage, not standard 115V
- Heavier at 98 pounds compared to smaller units
- Requires licensed HVAC installer for setup
Good fit if
- You need 18,000 BTU for larger spaces
- You have 208-230V electrical supply available
- You want smart control via Alexa
Skip if
- You only have standard 115V outlets
- You are installing in a small room under 1,000 sq ft
- You prefer a DIY installation without a professional
Verdict: YITAHOME 18,000 BTU Mini Split, 21 SEER2 is a high-capacity option for those with 208-230V power who need efficient cooling for larger areas. It fits buyers who value smart home integration and quiet operation over easy self-installation.
YITAHOME 12000 BTU 21 SEER2 Mini Split
Best for: medium rooms needing smart control
- Cooling Capacity
- 12,000 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 750 sq. ft.
- Heat Pump
- Heat Pump
- Smart Connectivity
- WiFi, Alexa, phone control
The YITAHOME 12,000 BTU mini split offers 21 SEER2 efficiency for spaces up to 750 square feet. It includes WiFi and Alexa control, plus five operating modes and four fan speeds. The unit runs quietly at under 41 dB and handles temperatures from 5°F to 118°F. You get a heat pump for year-round comfort, a 208-230V connection, and a washable air filter. This model suits those wanting smart features and reliable performance in a compact package.
Pros
- 21 SEER2 efficiency rating
- WiFi and Alexa connectivity
- Operates below 41 dB
- Five operating modes included
Cons
- 12,000 BTU capacity limits coverage to 750 sq ft
- Requires 208-230V electrical connection
- Indoor unit is 29.9 inches wide
Good fit if
- You need smart control via WiFi
- You want quiet operation under 41 dB
- You have a 208-230V power source
Skip if
- You require 115V standard outlet compatibility
- You need to cool over 750 sq ft
- You prefer manual-only operation without app
Verdict: The YITAHOME 12,000 BTU Mini Split AC fits users who prioritize energy efficiency and smart home integration for medium-sized rooms. It delivers strong cooling performance with quiet operation, provided you have the correct 208-230V wiring.
Specifications side by side
| Spec | COSTWAY 12,000 BTU 21 SEER2 Mini Split | Rellytech 18k BTU 21 SEER2 Mini Split | COSTWAY 9000 BTU Mini Split 21 SEER2 | TOSOT 33,600 BTU 21 SEER2 Mini Split | Della Vario 24K BTU 21 SEER2 | YITAHOME 18,000 BTU 21 SEER2 Mini Split | YITAHOME 12000 BTU 21 SEER2 Mini Split |
|---|---|---|---|---|---|---|---|
| Cooling Capacity | 12,000 BTU | 18000 BTU | 9000 BTU | 33,600 BTU | 24,000 BTU/h (2 Ton) | 18000 BTU (1.5 Ton) | 12,000 BTU |
| Efficiency Rating | 21 SEER2 | 21 SEER2 | 21 SEER2 | 21 SEER2 | 21 SEER2 | 21 SEER2 | 21 SEER2 |
| Voltage | 208-230V | 208V/230V | 208/230V | 208-230V | 208–230V | 208-230V | 208-230V |
| Coverage Area | Up to 750 sq ft | up to 1250sq.ft | Up to 450 Sq. Ft | not specified | up to 1500 Sq. Ft | Up to 1250 Sq. Ft | Up to 750 sq. ft. |
| Heat Pump | Heat Pump | Heat Pump | Heat Pump | Heating System | Heat pump | Heat Pump | Heat Pump |
| Smart Connectivity | not specified | not specified | WiFi, Alexa, Google Assistant, App | Wi-Fi, GREE+ app, voice control | Wifi, Alexa | WiFi, Alexa | WiFi, Alexa, phone control |
| Smart Control | not specified | Wi-Fi | Wi-Fi, Alexa | Wi-Fi | Wi-Fi, Alexa | Wi-Fi, Alexa | Wi-Fi, Alexa |
| Dimensions | 8 × 30 × 11.5 inches | 12.4 × 39.6 × 9.5 inches | 7.48 × 31.9 × 12.1 inches | 39.4 × 29.4 × 16.8 inches | 10.3 × 46.9 × 14.2 inches | 8.9 × 38.8 × 12.4 inches | 7.8 × 29.9 × 11.6 inches |
| Weight | 17.5 pounds | 95.1 pounds | 19.8 pounds | 181 pounds | 36.4 pounds | 98 pounds | 19.3 pounds |
| Size | 12000BTU, 208-230V, 21 SEER2 | 18000BTU,230V,21 SEER2-WiFi | not specified | WiFi - 36,000 BTU 230V (R 32 Refrigerant) | 24,000 BTU - 230V / 21 SEER2 | not specified | 12000 BTU 208-230V / 21 SEER2 |
| Color | 12000BTU, 208-230V, 21 SEER2 | White | White | White | White | White | White |
| Model | 10418US-CYFP | CE0-1 | Blast Pro | GWH36ATEXH-D6DNA1G/O | TL-24K2VB-21S-I+O | MAYIHqDjgf | MAYIHO3QoF |
When you need to compare matching capacity ratings, you can evaluate koolsiln 12 alternatives as another option.
Frequently asked questions
Which costway 12 alternative is best for large rooms?
The TOSOT 33,600 BTU Mini Split is the top choice for large spaces. It provides 21 SEER2 efficiency and uses R32 refrigerant. The unit measures 39.4 inches long and weighs 181 pounds. It requires 230V power for professional installation. This high-capacity model delivers robust cooling for areas that exceed the 12,000 BTU range.
Can I use these alternatives without 230V power?
No, all listed alternatives require 230V or 208-230V power connections. The COSTWAY 12,000 BTU model needs 230V. The Rellytech 18,000 BTU unit also operates on 230V. The YITAHOME 12,000 BTU version requires 208-230V wiring. You must ensure your electrical setup supports these voltage requirements before installation.
Which option offers the quietest operation?
The COSTWAY 9,000 BTU Mini Split is noted for quiet operation. It is designed for small rooms where low noise is a priority. This model maintains 21 SEER2 efficiency and includes Wi-Fi smart control. It weighs only 19.8 pounds and measures 31.9 inches in width. It suits users who value silence over raw cooling power.
Do these mini splits include Wi-Fi control?
Yes, most alternatives include Wi-Fi connectivity. The Rellytech 18,000 BTU model features Wi-Fi. The COSTWAY 9,000 BTU unit also supports Wi-Fi. The TOSOT 33,600 BTU and YITAHOME 18,000 BTU models both include Wi-Fi. The Della 24,000 BTU unit adds Alexa compatibility. This allows remote monitoring and adjustment from your phone.
What is the smallest indoor unit size?
The COSTWAY 12,000 BTU model has the most compact indoor dimensions. It measures 30 inches wide, 11.5 inches high, and 8 inches long. It weighs 17.5 pounds. This slim profile fits well in moderate rooms. Other units, like the Rellytech, are significantly larger at 39.6 inches wide and 95.1 pounds.
Which alternative is best for Alexa users?
The Della 24,000 BTU Mini Split is the best choice for Alexa integration. It supports both Wi-Fi and Alexa smart control. It delivers 21 SEER2 efficiency and 24,000 BTU of cooling power. The unit measures 46.9 inches wide and requires 230V power. It is ideal for large rooms needing smart voice control.
Is there a budget-friendly option in this list?
The COSTWAY 9,000 BTU Mini Split is labeled as the best budget pick. It offers 21 SEER2 efficiency in a smaller package. It weighs just 19.8 pounds and measures 31.9 inches wide. It includes Wi-Fi control and operates on 230V power. It is suitable for small rooms where high capacity is not required.