6 Best Alternatives to the COSTWAY 18000 BTU 2 Zone (2026)
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The COSTWAY 18000 BTU 2 Zone system offers 24 SEER2 efficiency and concealed ducted installation for precise two-zone climate control. If you are researching costway 18000 btu 2 zone alternatives, you may need a different capacity or a single-zone setup. This unit combines inverter technology with smart app control and quiet operation at 28 dB. It fits homes requiring balanced heating and cooling across two distinct areas.
You might look elsewhere if you need higher total BTU output or prefer a wall-mounted design over a concealed unit. Some buyers seek simpler controls or different voltage requirements. The alternatives listed here share key specs like dual-zone capability, Wi-Fi connectivity, and high SEER2 ratings. We selected these options because their published specifications overlap with the original product. Each choice addresses specific needs, from larger spaces to budget constraints. You can compare the data to find the best fit for your home.
Our top pick: COSTWAY 18k Dual Zone Ducted Mini Split.
How these alternatives compare
COSTWAY 36k Dual Zone 23 SEER2
This COSTWAY model doubles the total cooling capacity to 36,000 BTU while maintaining 23 SEER2 efficiency. It splits power evenly with two 7,000 BTU indoor units. The outdoor unit is larger, measuring 41.2 inches wide. You get the same Wi-Fi smart control and 230V requirement. This option suits larger spaces or homes with higher cooling loads. It trades the original’s higher per-zone output for balanced, lower-output zones. Choose this if you need more total BTUs without sacrificing efficiency ratings. It is ideal for larger rooms where even distribution matters more than intense single-zone cooling.
COSTWAY 30k 2-Zone 23 SEER2 Mini Split
This unit offers 30,000 BTU total capacity with a 23 SEER2 rating. It uses a 7,000 BTU plus 9,000 BTU zone split. The outdoor dimensions match the previous model at 41.2 inches wide. It retains Wi-Fi connectivity and 230V operation. This setup favors larger primary rooms with smaller secondary spaces. You gain more total cooling power than the original 18,000 BTU unit. However, the efficiency is slightly lower at 23 SEER2 versus 24 SEER2. Select this if your layout has one dominant room and one small room. It provides a practical balance of capacity and smart control for varied room sizes.
DELLA 27K BTU 2-Zone 24 SEER2
The DELLA 27K BTU model delivers 12,000 plus 18,000 BTU across two zones. It matches the original’s 24 SEER2 efficiency rating. The outdoor unit is narrower at 36.3 inches wide. It includes Wi-Fi and Alexa compatibility for smart control. This option offers higher per-zone capacity for the larger room. You get the same voltage requirement and concealed installation potential. Choose this if you need stronger cooling in one specific area. It trades the original’s balanced 9k/12k split for a more asymmetric 12k/18k distribution. It is best for spaces where one room requires significantly more cooling power.
Garvee 20000 BTU Dual Zone Mini Split
This Garvee system provides 18,000 BTU plus 18,000 BTU across two zones. The total capacity is 36,000 BTU, which is double the original. It maintains Wi-Fi smart control and 230V operation. The outdoor unit is significantly larger, measuring 44 inches wide. You get balanced cooling power for two medium-sized rooms. This model sacrifices the original’s higher 24 SEER2 efficiency for greater total output. It is ideal for larger open areas or homes with high heat loads. Select this if you need substantial cooling capacity across two equal zones. It offers robust performance for spaces that exceed the original unit’s coverage area.
TOSOT 33,600 BTU 21 SEER2 Mini Split
This TOSOT unit is a single-zone system with 36,000 BTU capacity. It has a 21 SEER2 efficiency rating, which is lower than the original. It includes Wi-Fi connectivity and operates on 230V. You lose the dual-zone flexibility entirely. This option is for large single rooms that need high cooling power. It does not split airflow between two spaces. Choose this if you have one large room and do not need zone control. It trades multi-zone precision for maximum single-zone output. It is suitable for open-plan areas or large commercial spaces where uniform cooling is the priority.
DELLA Vita 36,000 BTU 20 SEER2
The DELLA Vita model offers 36,000 BTU in a single-zone configuration. It has a 20 SEER2 efficiency rating, which is lower than the original. It includes Wi-Fi and Alexa support for smart control. The outdoor unit is wider at 48 inches. You gain significant cooling power for one large space. This model eliminates dual-zone capability entirely. Select this if you need maximum BTUs for a single room. It is not suitable for homes requiring separate temperature control in different areas. It provides high capacity for large open layouts where zone splitting is unnecessary or impractical.
Quick picks
Our 7 picks
COSTWAY 18k Dual Zone Ducted Mini Split
Best for: Efficient two-zone ducted cooling
- Cooling Capacity
- 18000 BTU
- Efficiency Rating
- 24 SEER2
- Voltage
- 208/230V
- Number of Zones
- 2 Zone
- Heat Pump
- Heat pump
- Smart Connectivity
- WiFi, App, Alexa, Google Assistant
View on Amazon: COSTWAY 18k Dual Zone Ducted Mini Split Affiliate link
This concealed ducted mini split delivers 18,000 BTU across two zones with a 24 SEER2 efficiency rating. It uses R454B refrigerant and includes WiFi app control for remote management. The unit operates on 208-230V power and features chassis electrical heating for reliable performance in cold weather. It is designed for ducted installation in homes or light commercial spaces.
Pros
- 24 SEER2 energy efficiency rating
- WiFi and app control compatibility
- 208/230V voltage support
- Chassis electrical heating for low ambient operation
Cons
- Requires concealed ducted installation
- Professional installation is mandatory
- Larger outdoor unit dimensions
Good fit if
- You need efficient cooling for two separate rooms
- You want smart app control for scheduling
- You have existing ductwork for concealed mounting
Skip if
- You prefer a portable or window unit
- You cannot hire a professional installer
- You need a single-zone configuration only
Verdict: COSTWAY 18k BTU 2-Zone Ducted Mini Split is a strong choice for homeowners seeking high efficiency and smart control in a concealed format. It fits users who value precise temperature management across two zones.
COSTWAY 36k Dual Zone 23 SEER2
Best for: High capacity dual-zone cooling needs
- Cooling Capacity
- 36000 BTU
- Efficiency Rating
- 23 SEER2
- Voltage
- 208-230V
- Number of Zones
- 2 Zone
- Heat Pump
- Heat Pump
- Smart Control
- Wi-Fi
View on Amazon: COSTWAY 36k Dual Zone 23 SEER2 Affiliate link
This COSTWAY dual-zone mini split delivers 36,000 BTU of cooling across two 7,000 BTU indoor units. It features a 23 SEER2 efficiency rating and R32 refrigerant for lower environmental impact. The outdoor unit operates in temperatures from -13°F to 125°F. You get Wi-Fi control, a 24-hour timer, and five fan speeds. It is designed for larger spaces needing independent zone control.
Pros
- High 23 SEER2 energy efficiency rating
- Total 36,000 BTU cooling capacity
- Wi-Fi smart control via smartphone
- Operates in -13°F to 125°F climates
- Uses low-GWP R32 refrigerant
Cons
- Each zone provides only 7,000 BTU
- Requires 208-230V electrical connection
- Professional HVAC installation is mandatory
Good fit if
- You need high total cooling power
- You have 208-230V wiring available
- You want Wi-Fi remote management
Skip if
- You only have standard 115V outlets
- You need more than 7,000 BTU per room
- You prefer a DIY installation process
Verdict: COSTWAY 36k 2 Zone Mini Split, 23 SEER2 suits users who need substantial cooling capacity across two small rooms and have the necessary 208-230V power infrastructure. It is ideal for those prioritizing efficiency and smart control over per-zone output.
COSTWAY 30k 2-Zone 23 SEER2 Mini Split
Best for: large spaces needing 30k BTU cooling
- Cooling Capacity
- 30000 BTU
- Efficiency Rating
- 23 SEER2
- Voltage
- 208-230V
- Number of Zones
- 2 Zone
- Heat Pump
- Heat Pump
- Smart Control
- Wi-Fi
View on Amazon: COSTWAY 30k 2-Zone 23 SEER2 Mini Split Affiliate link
This COSTWAY unit delivers 30,000 BTU of cooling across two zones (7,000 and 9,000 BTU). It operates on 208-230V power and carries a 23 SEER2 rating. The system uses R32 refrigerant and includes Wi-Fi for smartphone control. You get a remote control and 24-hour timer for scheduling. The outdoor unit handles temperatures from -13°F to 125°F. This model suits larger spaces needing strong cooling capacity.
Pros
- 30,000 BTU total cooling capacity for larger rooms
- 23 SEER2 energy efficiency rating
- Wi-Fi enabled for remote smartphone control
- Includes physical remote control and 24-hour timer
Cons
- Requires 208-230V electrical connection
- Outdoor unit is large at 41.2 inches wide
- Indoor units have modest 7,000 and 9,000 BTU splits
Good fit if
- You need 30,000 BTU of total cooling power
- You have a 208-230V electrical supply available
- You want Wi-Fi control with a backup remote
Skip if
- You only have standard 115V outlets
- You prefer a single zone setup
- You need a more balanced zone split
Verdict: COSTWAY 30k 2 Zone 23 SEER2 Mini Split fits homes needing high capacity cooling on 208-230V circuits. It balances strong output with smart features, though the zone split favors the larger room.
DELLA 27K BTU 2-Zone 24 SEER2
Best for: large spaces needing high capacity zoned cooling
- Cooling Capacity
- 27000 BTU/h
- Efficiency Rating
- 24 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 1550 Sq.Ft
- Number of Zones
- 2 Zone
- Heat Pump
- Heat Pump
View on Amazon: DELLA 27K BTU 2-Zone 24 SEER2 Affiliate link
This 27,000 BTU dual-zone system pairs a 12,000 BTU unit with an 18,000 BTU unit. It delivers 24 SEER2 efficiency and covers up to 1550 square feet. The outdoor unit operates on 208-230V. You get individual temperature control for each room. Smart features include WiFi and Alexa compatibility. It is a strong option for larger spaces needing zoned comfort.
Pros
- 24 SEER2 efficiency rating
- 27,000 BTU total cooling capacity
- Covers up to 1550 square feet
- Works with Alexa and WiFi app
- Includes 12,000 and 18,000 BTU indoor units
Cons
- Larger 18,000 BTU indoor unit may not fit small rooms
- No self-cleaning function despite button presence
- Requires professional installation and line-set vacuuming
Good fit if
- You need to cool a large area up to 1550 square feet
- You want high energy efficiency with a 24 SEER2 rating
- You prefer smart home integration with Alexa
Skip if
- You only need to cool a single small room
- You require a self-cleaning feature
- You are looking for a lower capacity unit under 20,000 BTU
Verdict: DELLA 27K BTU 2 Zone Mini Split is ideal for homeowners with large open spaces who need powerful, efficient zoned cooling. Its high SEER2 rating and smart connectivity make it a practical choice for modern homes.
Garvee 20000 BTU Dual Zone Mini Split
Best for: Moderate spaces needing dual-zone smart control
- Cooling Capacity
- 20000 BTU
- Efficiency Rating
- 20 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 1000 sq ft
- Number of Zones
- 2 Zone
- Heat Pump
- Heater
View on Amazon: Garvee 20000 BTU Dual Zone Mini Split Affiliate link
The Garvee 20000 BTU Dual Zone Mini Split offers 208-230V operation with a 20 SEER2 efficiency rating. It covers up to 1000 sq ft using two 18000 BTU indoor units. You get Wi-Fi app control, voice commands, and independent zone management. This unit suits those needing flexible cooling for two distinct areas in a moderate-sized space.
Pros
- 20 SEER2 efficiency rating for energy savings
- Wi-Fi enabled with app and voice control
- 208-230V voltage compatibility for US homes
- Independent temperature control for two zones
Cons
- Lower 20 SEER2 rating compared to 23-24 SEER2 competitors
- Heavier 211-pound outdoor unit
- Smaller 1000 sq ft coverage area
Good fit if
- You need independent control for two separate rooms
- You prefer 208-230V electrical systems
- You want smart app and voice connectivity
Skip if
- You require higher than 20 SEER2 efficiency
- You need to cool more than 1000 sq ft
- You want a lighter outdoor unit for easy mounting
Verdict: The Garvee 20000 BTU Dual Zone Mini Split fits buyers who prioritize smart connectivity and dual-zone flexibility over maximum efficiency. It is a solid option for moderate-sized spaces with standard voltage requirements.
TOSOT 33,600 BTU 21 SEER2 Mini Split
Best for: single large rooms needing high BTU output
- Cooling Capacity
- 33,600 BTU
- Efficiency Rating
- 21 SEER2
- Voltage
- 208-230V
- Heat Pump
- Heating System
- Smart Connectivity
- Wi-Fi, Voice Control, GREE+ App
- Dimensions
- 39.4 × 29.4 × 16.8 inches
View on Amazon: TOSOT 33,600 BTU 21 SEER2 Mini Split Affiliate link
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. The system features a 16 ft copper line set and runs quietly between 22dB and 36dB. It is designed for larger spaces requiring strong cooling in high heat and heating in cold conditions.
Pros
- 21 SEER2 efficiency rating for lower power bills
- 33,600 BTU cooling capacity for large areas
- Wi-Fi enabled with GREE+ app and voice control
- Includes 16 ft copper line set for installation
- Quiet operation from 22dB to 36dB
Cons
- Single-zone design unlike the 2-zone alternatives on this list
- Heavier build at 181 pounds
- Requires professional installation and vacuuming
Good fit if
- You need high cooling capacity for a large room
- You prefer 230V electrical connections
- You want smart app control for scheduling
Skip if
- You require a dual-zone system for separate rooms
- You are limited to 115V electrical outlets
- You want a lighter unit for easier handling
Verdict: TOSOT 33,600 BTU 21 SEER2 Mini Split fits buyers who need maximum cooling power and smart features for a single large space. It is not suitable for those needing multi-zone temperature control.
DELLA Vita 36,000 BTU 20 SEER2
Best for: Single large rooms needing 36k BTU
- Cooling Capacity
- 36,000 BTU
- Efficiency Rating
- 20 SEER2
- Voltage
- 230V
- Coverage Area
- 2500 sq ft
- Heat Pump
- Heat Pump
- Smart Connectivity
- Wi-Fi, Alexa, Google Assistant, App
View on Amazon: DELLA Vita 36,000 BTU 20 SEER2 Affiliate link
This 36,000 BTU mini split cools spaces up to 2,500 square feet with 20 SEER2 efficiency. It runs on 230V power and includes a 16ft copper line set. The indoor unit operates at 37 dB. It features Wi-Fi control, an app, and an I Feel sensor. You get reliable heating down to -4℉. This unit suits large rooms needing strong cooling without zone splitting.
Pros
- 20 SEER2 energy efficiency rating
- Cools up to 2,500 sq ft
- Quiet 37 dB indoor operation
- Includes 16ft copper line set
- Smart app and voice control
Cons
- Single zone, not dual zone
- Higher 37 dB noise level
- No 4th season heating below -4℉
Good fit if
- You need to cool a single large room
- You want a complete installation kit
- You prefer 230V electrical connections
Skip if
- You require two separate zones
- You need dual zone capability
- You want lower noise than 37 dB
Verdict: DELLA Vita 36k BTU 20 SEER2 Mini Split delivers high capacity for single large rooms. You should buy this if you need 36,000 BTU of cooling power without zone splitting.
Specifications side by side
| Spec | COSTWAY 18k Dual Zone Ducted Mini Split | COSTWAY 36k Dual Zone 23 SEER2 | COSTWAY 30k 2-Zone 23 SEER2 Mini Split | DELLA 27K BTU 2-Zone 24 SEER2 | Garvee 20000 BTU Dual Zone Mini Split | TOSOT 33,600 BTU 21 SEER2 Mini Split | DELLA Vita 36,000 BTU 20 SEER2 |
|---|---|---|---|---|---|---|---|
| Cooling Capacity | 18000 BTU | 36000 BTU | 30000 BTU | 27000 BTU/h | 20000 BTU | 33,600 BTU | 36,000 BTU |
| Efficiency Rating | 24 SEER2 | 23 SEER2 | 23 SEER2 | 24 SEER2 | 20 SEER2 | 21 SEER2 | 20 SEER2 |
| Voltage | 208/230V | 208-230V | 208-230V | 208-230V | 208-230V | 208-230V | 230V |
| Coverage Area | not stated | not stated | not stated | Up to 1550 Sq.Ft | Up to 1000 sq ft | not stated | 2500 sq ft |
| Number of Zones | 2 Zone | 2 Zone | 2 Zone | 2 Zone | 2 Zone | not stated | not stated |
| Heat Pump | Heat pump | Heat Pump | Heat Pump | Heat Pump | Heater | Heating System | Heat Pump |
| Smart Connectivity | WiFi, App, Alexa, Google Assistant | not stated | not stated | WiFi, Alexa, App | Wi-Fi, App control, Voice | Wi-Fi, Voice Control, GREE+ App | Wi-Fi, Alexa, Google Assistant, App |
| Smart Control | Wi-Fi | Wi-Fi | Wi-Fi | Wi-Fi, Alexa | Wi-Fi | Wi-Fi | Wi-Fi, Alexa |
| Dimensions | 13.9 × 34.7 × 21.9 inches | 17.9 × 41.2 × 31.8 inches | 17.9 × 41.2 × 31.8 inches | 7.69 × 36.3 × 12.1 inches | 38 × 44 × 21 inches | 39.4 × 29.4 × 16.8 inches | 9.88 × 48 × 14.2 inches |
| Weight | not stated | not stated | not stated | 23.1 pounds | 211 pounds | 181 pounds | 38.6 pounds |
| Size | Dual Zone-18000BTU 9+12 | Dual Zone 7000 BTU+7000 BTU | Dual Zone 7000 BTU+9000 BTU | 2 Zone - 27000 BTU 12+18 | 2 Zone -35000 ODU-18K+18K IDU -WIFI | WiFi - 36,000 BTU 230V (R 32 Refrigerant) | 36,000 BTU - 230V / 20 SEER2 |
| Color | White | White | White | White | White | White | White |
| Model | not stated | B0F91FTFQS | B0F917PLP2 | 1D3-TP+D1218 | 33Q4J8V7SC33h | SU-COSMO36-230 | TC-36K2VR-20S-I+O |
If you also heat water spaces, you can evaluate specifications for aychlg 18000 btu swimming pool alternatives.
Frequently asked questions
Can I get 36,000 BTU in a dual-zone setup?
Yes, the COSTWAY 36k Dual Zone model provides 36,000 BTU total. It splits this evenly into two 7,000 BTU indoor units. This setup maintains 23 SEER2 efficiency. It requires a 230V circuit. The outdoor unit measures 41.2 inches wide.
What is the most efficient dual-zone option available?
The DELLA 27K BTU 2-Zone model offers 24 SEER2 efficiency. It delivers 27,000 BTU total, split between a 12,000 BTU and an 18,000 BTU indoor unit. It supports Wi-Fi and Alexa control. The outdoor unit is compact at 36.3 inches wide.
Is there a high-capacity single-zone alternative?
The TOSOT 33,600 BTU unit provides 36,000 BTU of cooling power. It is a single-zone system with 21 SEER2 efficiency. It uses R-32 refrigerant and requires 230V power. The indoor unit measures 39.4 inches long. It includes Wi-Fi smart control.
Which model offers the highest BTU output for one room?
The DELLA Vita 36,000 BTU 20 SEER2 is designed for single large rooms. It delivers 36,000 BTU without zone splitting. It supports Wi-Fi and Alexa. The outdoor unit is 48 inches wide. It requires a 230V electrical connection.
How does the Garvee 20,000 BTU model split zones?
The Garvee 20,000 BTU Dual Zone Mini Split features an outdoor unit rated at 35,000 BTU. It connects to two 18,000 BTU indoor units. This configuration provides strong cooling for moderate spaces. It includes Wi-Fi smart control and runs on 230V.
What is the best budget-friendly dual-zone choice?
The COSTWAY 30k 2-Zone 23 SEER2 Mini Split is listed as the best budget option. It provides 30,000 BTU total, split into 7,000 and 9,000 BTU zones. It offers 23 SEER2 efficiency. It includes Wi-Fi control and requires 230V power.