6 Best Alternatives to the Rellytech Mini Split AC/Heating System (2026)
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The Rellytech 18,000 BTU 230V Mini Split delivers strong cooling and heating power for large spaces up to 1,250 sq. ft. If you are looking for rellytech mini split AC heating system alternatives, you may need a different capacity or voltage. Some buyers prefer smaller units for tighter rooms, while others want higher efficiency ratings or smart connectivity features not present in this model.
This list of 6 options focuses on products with overlapping specifications. We selected these units because they share key traits like 230V power or similar SEER2 efficiency. Whether you need a compact 9,000 BTU unit for a bedroom or a budget-friendly 12,000 BTU system for a medium room, these alternatives provide practical solutions. Each choice matches specific needs, from quiet operation to precise temperature control, ensuring you find the right fit for your home.
Our top pick: Rellytech 18000 BTU 230V Mini Split.
How these alternatives compare
COSTWAY 9100 BTU Mini Split
The COSTWAY 9100 BTU model targets small rooms under 450 square feet, significantly smaller than the Rellytech’s 1,250-square-foot coverage. It operates on the same 230V circuit and shares the 19 SEER2 efficiency rating, but its cooling capacity is nearly half that of the Rellytech. The indoor unit is also much narrower at 31.2 inches wide and lighter at 17.6 pounds, making installation easier in tight spaces. You should choose this if you have a smaller room and do not need high heating power. It sacrifices raw capacity for a more compact footprint and quiet operation suitable for bedrooms or home offices.
Mountman 12000 BTU 230V Mini Split
The Mountman 12000 BTU unit covers up to 750 square feet, which is smaller than the Rellytech’s 1,250-square-foot range. It matches the 230V requirement and 19 SEER2 efficiency, but offers less total cooling power. The indoor unit is slightly wider at 32.3 inches but taller at 11.9 inches compared to the Rellytech’s 9.5 inches. This model focuses on practical, quiet performance without smart connectivity features. It is a solid choice for medium-sized rooms where you want reliable climate control without extra digital features. You get similar efficiency but less coverage area and lower BTU output.
Tehanld 12000 BTU 230V Mini Split
The Tehanld 12000 BTU Mini Split provides 750 square feet of coverage, falling short of the Rellytech’s 1,250-square-foot capacity. It runs on 230V and achieves the same 19 SEER2 efficiency rating. The indoor unit dimensions are nearly identical to the Mountman, measuring 32.3 inches wide and 11.9 inches tall. It weighs 77 pounds, which is lighter than the Rellytech’s 112-pound system. This option suits medium rooms with existing 230V power where 12,000 BTU is sufficient. You trade the Rellytech’s larger coverage area for a more compact system that still delivers efficient cooling and heating for smaller spaces.
Nexaro 12000BTU Mini Split, 19 SEER2
The Nexaro 12000 BTU model covers up to 750 square feet, which is significantly less than the Rellytech’s 1,250-square-foot capability. It shares the 230V voltage and 19 SEER2 efficiency rating, ensuring comparable energy performance. The indoor unit is 32.3 inches wide and 13 inches tall, making it slightly taller than the Rellytech. It weighs 68 pounds, which is much lighter than the Rellytech’s 112 pounds. This unit is best for medium rooms where you need efficient cooling but do not require the higher capacity of the Rellytech. You get a lighter, more compact system with similar efficiency but less overall cooling power.
Garvee 9000 BTU 230V Mini Split
The Garvee 9000 BTU Mini Split is designed for small rooms and offers significantly less cooling power than the Rellytech’s 18,000 BTU. It operates on 230V and maintains the 19 SEER2 efficiency rating. The indoor unit has a unique horizontal orientation, measuring 33 inches wide and 13.4 inches tall, which differs from the Rellytech’s vertical design. It weighs 77.2 pounds, making it lighter than the Rellytech. This model is ideal for small spaces where you value quiet performance and precise temperature control over raw capacity. You sacrifice the Rellytech’s large coverage area for a compact, efficient unit suited for smaller rooms.
Mountman 12000 BTU 230V Mini Split
The second Mountman 12000 BTU unit covers 750 square feet, which is smaller than the Rellytech’s 1,250-square-foot range. It uses the same 230V power and 19 SEER2 efficiency rating. The indoor unit dimensions are 32.3 inches wide and 11.9 inches tall, matching the other Mountman model. This system focuses on steady, quiet performance for medium rooms without smart features. It is a practical alternative if you do not need the Rellytech’s higher capacity. You get similar efficiency and voltage requirements but with less cooling power and a slightly different indoor unit profile, making it suitable for smaller, quieter environments.
Quick picks
Our 7 picks
Rellytech 18000 BTU 230V Mini Split
Best for: large rooms needing high capacity cooling
- Cooling Capacity
- 18,000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 1,250 sq. ft.
- Heat Pump
- Heat Pump
- Dimensions
- 12.4 × 39.6 × 9.5 inches
The Rellytech 18000 BTU Mini Split AC/Heating System delivers 18,000 BTU of cooling and 18,400 BTU of heating for spaces up to 1,250 sq. ft. It features a 19 SEER2 rating and 8.5 HSPF2 for efficient operation on 208-230V circuits. You get four modes, four fan speeds, and a 90-degree vertical swing. This unit suits larger rooms or open areas where high capacity is necessary.
Pros
- 18,000 BTU cooling capacity for larger spaces
- 19 SEER2 efficiency rating reduces energy use
- Includes ECO mode for optimized temperature control
- 90-degree vertical swing for wide airflow coverage
Cons
- Heavier build at 112 pounds
- Requires 208-230V electrical connection
- Larger indoor unit dimensions
Good fit if
- You need cooling for a room up to 1,250 sq. ft.
- You have a 208-230V circuit available
- You want high capacity with efficient SEER2 ratings
Skip if
- You only have a standard 115V outlet
- You are cooling a small room under 900 sq. ft.
- You need a more compact indoor unit
Verdict: Rellytech 18000 BTU Mini Split fits large rooms or open areas where you need strong cooling and heating power on a 230V circuit.
COSTWAY 9100 BTU Mini Split
Best for: small rooms under 450 sq ft
- Cooling Capacity
- 9,100 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 208-230V
- Coverage Area
- Up to 450 sq ft
- Heat Pump
- Heat Pump
- Mounting Type
- Wall Mount
This COSTWAY unit delivers 9100 BTU of cooling and 9200 BTU of heating for spaces up to 450 square feet. It operates on 208-230V power with a 19 SEER2 efficiency rating. The system includes seven modes and five fan speeds. You get 4D airflow swing and a remote with a 26-foot range. It runs quietly at 23 dB and features self-cleaning capabilities for easy maintenance.
Pros
- 19 SEER2 cooling efficiency rating
- 9100 BTU cooling and 9200 BTU heating capacity
- Ultra-quiet 23 dB operation
- 4D airflow swing with remote control
- Self-cleaning function and washable filters
Cons
- Lower 9100 BTU capacity compared to 18000 BTU competitors
- Heating efficiency is 8.5 HSPF2, lower than cooling SEER2
- Outdoor unit is heavier at 17.6 pounds
Good fit if
- You need a compact unit for a small room under 450 sq ft
- You want quiet operation for a bedroom or nursery
- You prefer manual control via remote over smartphone apps
Skip if
- You require heating capacity larger than 9200 BTU
- You need to cool a space larger than 450 square feet
- You are looking for a 12000 BTU or higher system
Verdict: COSTWAY 9100 BTU Mini Split is a quiet, efficient choice for small rooms where lower heating power is acceptable. It suits buyers who prioritize low noise and easy maintenance over raw cooling capacity.
Mountman 12000 BTU 230V Mini Split
Best for: medium rooms needing quiet, efficient climate control
- Cooling Capacity
- 12,000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 208/230V
- Coverage Area
- Up to 750 sq ft
- Heat Pump
- Heat Pump
- Dimensions
- 8.23 × 32.3 × 11.9 inches
The Mountman 12000 BTU mini split delivers 19 SEER2 efficiency on 208/230V power. It cools and heats spaces up to 750 square feet using inverter technology and R32 refrigerant. You get four fan speeds, sleep mode at 26dB, and self-cleaning functions. This unit offers solid year-round climate control for medium-sized rooms without complex smart features.
Pros
- 19 SEER2 energy efficiency rating for cost-effective operation
- Covers up to 750 square feet with 12,000 BTU capacity
- Ultra-quiet sleep mode operates at 26dB
- Auto-maintain self-cleaning and defrost functions
- Uses eco-friendly R32 refrigerant
Cons
- 12,000 BTU capacity is lower than the 18,000 BTU option on this list
- No Wi-Fi or smart app control listed in specifications
- Larger indoor unit dimensions (32.3 inches wide) than compact 9,000 BTU models
Good fit if
- You need a 208/230V unit for a standard 12,000 BTU room
- You prioritize quiet operation with a dedicated sleep mode
- You want self-cleaning features to reduce maintenance effort
Skip if
- You require smart home integration or app control
- You need to cool a space larger than 750 square feet
- You are looking for the highest capacity on this list
Verdict: Mountman 12000 BTU 19 SEER2 Mini Split is a practical choice for medium rooms where quiet operation and energy efficiency matter more than smart connectivity. It fits users who want reliable cooling and heating without the need for Wi-Fi features.
Tehanld 12000 BTU 230V Mini Split
Best for: Medium rooms with 230V power
- Cooling Capacity
- 12,000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 230V
- Coverage Area
- Up to 750 sq. ft.
- Heat Pump
- 1-ton heat pump
- Dimensions
- 8.3 × 32.3 × 11.9 inches
The Tehanld 12000 BTU Mini Split offers 19 SEER2 efficiency and 230V power for spaces up to 750 sq. ft. It uses a 1-ton heat pump with R32 refrigerant and inverter technology. You get five operation modes and four fan speeds. The unit includes a sleep timer and eco mode. It is a solid option for moderate-sized rooms needing reliable cooling and heating.
Pros
- 19 SEER2 efficiency rating
- 12,000 BTU cooling capacity
- 230V voltage support
- Five operation modes
- R32 eco-friendly refrigerant
Cons
- Smaller 12,000 BTU capacity than the 18,000 BTU Rellytech
- Heavier 77-pound indoor unit
- Ships in two separate packages
Good fit if
- You need a 12,000 BTU unit for a 750 sq. ft. space
- You prefer 230V electrical connections
- You want R32 refrigerant efficiency
Skip if
- You require more than 12,000 BTU of cooling power
- You need a 115V compatible model
- You want a single-package delivery
Verdict: Tehanld 12000 BTU Mini Split 19 SEER2 is a practical choice for medium rooms where 230V power is available and 12,000 BTU is sufficient.
Nexaro 12000BTU Mini Split, 19 SEER2
Best for: medium rooms with 230V power
- Cooling Capacity
- 12000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 230V
- Coverage Area
- Up to 750 sq ft
- Heat Pump
- Heat pump
- Dimensions
- 8.25 × 32.3 × 13 inches
The Nexaro 12000 BTU mini split offers 19 SEER2 efficiency and 230V power for rooms up to 750 square feet. It uses R32 refrigerant and includes a heat pump for year-round comfort. You get five modes, four fan speeds, and a 24-hour timer. The unit measures 32.3 inches wide and weighs 68 pounds. It is a solid option for medium-sized spaces needing reliable cooling and heating.
Pros
- 19 SEER2 efficiency rating
- 230V power connection
- Covers up to 750 sq ft
- Includes 24-hour timer and sleep mode
- Uses eco-friendly R32 refrigerant
Cons
- Smaller 12000 BTU capacity than the 18000 BTU list leader
- Heavier at 68 pounds compared to lighter competitors
- Requires 230V outlet, limiting placement options
Good fit if
- You need a 12000 BTU unit for a medium room
- You have a 230V electrical circuit available
- You want R32 refrigerant for better efficiency
Skip if
- You require a 18000 BTU unit for a large space
- You only have a standard 115V outlet
- You prefer a lighter indoor unit under 60 pounds
Verdict: Nexaro 12000 BTU Mini Split suits those with 230V power who need efficient cooling for a 750 sq ft room. It delivers strong performance for medium spaces but lacks the raw power of larger models.
Garvee 9000 BTU 230V Mini Split
Best for: small rooms with 230V power
- Cooling Capacity
- 9000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 230 V
- Coverage Area
- up to 450 sq ft
- Heat Pump
- 0.75Ton Heat Pump
- Dimensions
- 33 × 13.4 × 21.4 inches
The Garvee 9000 BTU Mini Split delivers cooling and heating for spaces up to 450 sq ft. It features a 19 SEER2 efficiency rating and operates on 230V power. The unit includes a remote control with an iFEEL sensor and 24-hour timer. It offers six modes, including Eco and Auto. The system runs quietly at 23 dB and handles extreme temperatures from -4°F to 140°F.
Pros
- 19 SEER2 efficiency rating for energy savings
- Ultra-quiet operation down to 23 dB
- Wide temperature range from -4°F to 140°F
- Includes remote with iFEEL sensor and timer
Cons
- Lower 9000 BTU capacity compared to 12000+ BTU alternatives
- Requires 230V electrical connection
- Ships in two separate packages
Good fit if
- You need efficient cooling for a small room under 450 sq ft
- You have a 230V outlet available for installation
- You prioritize quiet operation for a bedroom or office
Skip if
- You require a 115V plug for standard household outlets
- You need to cool a large space over 450 sq ft
- You want a higher BTU capacity for better heating in cold climates
Verdict: Garvee 9000 BTU Mini Split is a compact, efficient option for small rooms with 230V power. It suits users who value quiet performance and precise temperature control over raw cooling power.
Mountman 12000 BTU 230V Mini Split
Best for: Quiet, efficient medium-room climate control
- Cooling Capacity
- 12000 BTU
- Efficiency Rating
- 19 SEER2
- Voltage
- 230V
- Coverage Area
- Up to 750 sq ft
- Heat Pump
- Heat Pump
- Dimensions
- 8.23 × 32.3 × 11.9 inches
The Mountman 12000 BTU mini split delivers 19 SEER2 efficiency on a 230V circuit. It cools and heats spaces up to 750 square feet using inverter technology and R32 refrigerant. You get four fan speeds, sleep mode at 26dB, and self-cleaning functions. This unit suits you if you need reliable year-round climate control for a medium-sized room without complex smart features.
Pros
- 19 SEER2 energy efficiency rating
- Covers up to 750 square feet
- 230V power requirement for stable operation
- Ultra-quiet sleep mode at 26dB
- Includes remote control with timer
Cons
- Requires 230V electrical circuit, not standard 115V
- No Wi-Fi or smart app connectivity
- Lacks built-in dehumidifier beyond dry mode
Good fit if
- You have a 230V outlet available
- You want quiet operation for bedrooms
- You need efficient heating and cooling
Skip if
- You only have 115V outlets
- You want app-based remote control
- You need to cool large open areas
Verdict: Mountman 12000 BTU 230V Mini Split offers steady comfort for medium rooms. It fits you if you value quiet, efficient performance over smart features.
Specifications side by side
| Spec | Rellytech 18000 BTU 230V Mini Split | COSTWAY 9100 BTU Mini Split | Mountman 12000 BTU 230V Mini Split | Tehanld 12000 BTU 230V Mini Split | Nexaro 12000BTU Mini Split, 19 SEER2 | Garvee 9000 BTU 230V Mini Split | Mountman 12000 BTU 230V Mini Split |
|---|---|---|---|---|---|---|---|
| Cooling Capacity | 18,000 BTU | 9,100 BTU | 12,000 BTU | 12,000 BTU | 12000 BTU | 9000 BTU | 12000 BTU |
| Efficiency Rating | 19 SEER2 | 19 SEER2 | 19 SEER2 | 19 SEER2 | 19 SEER2 | 19 SEER2 | 19 SEER2 |
| Voltage | 208-230V | 208-230V | 208/230V | 230V | 230V | 230 V | 230V |
| Coverage Area | Up to 1,250 sq. ft. | Up to 450 sq ft | Up to 750 sq ft | Up to 750 sq. ft. | Up to 750 sq ft | up to 450 sq ft | Up to 750 sq ft |
| Heat Pump | Heat Pump | Heat Pump | Heat Pump | 1-ton heat pump | Heat pump | 0.75Ton Heat Pump | Heat Pump |
| Mounting Type | not specified | Wall Mount | not specified | not specified | not specified | not specified | not specified |
| Dimensions | 12.4 × 39.6 × 9.5 inches | 11.5 × 31.2 × 7.91 inches | 8.23 × 32.3 × 11.9 inches | 8.3 × 32.3 × 11.9 inches | 8.25 × 32.3 × 13 inches | 33 × 13.4 × 21.4 inches | 8.23 × 32.3 × 11.9 inches |
| Weight | 112 pounds | 17.6 pounds | not specified | 77 pounds | 68 pounds | 77.2 pounds | not specified |
| Size | 18000BTU,230V,19 SEER2 | 9100BTU, 208-230V, 19 SEER2 | 12000-208/230 | 12000BTU-230V-19SEER2 | 12000BTU, 230V, 19 SEER2 | 9K-230V-19 SEER2-L Panel | 12000 | 230 |
| Color | White | White | not specified | White | White | White | not specified |
| Model | CE0-1 | 11090-CYFP | 12000BTU-230V | T-MINI SPLIT AC-2 | NexaroS180 | CCKmnYX-u6vfgSqC3rowdQf03 | MM 12000BTU-230V |
Frequently asked questions
Can I use these mini splits on a 110V circuit instead of 230V?
No. All listed alternatives require a 230V power connection. The Rellytech and every competitor here, including the COSTWAY, Mountman, and Nexaro models, specify 230V or 208-230V operation. You must have a dedicated 230V circuit installed. Standard 110V outlets will not work for these units.
Which alternative is best for a small room under 450 square feet?
The COSTWAY 9100 BTU Mini Split is the best choice for small spaces. It targets rooms under 450 square feet. This unit offers 19 SEER2 efficiency and operates on 230V. Its lower capacity matches smaller areas better than the 12,000 or 18,000 BTU options.
Do these models have Wi-Fi or smart home connectivity?
The provided specifications do not mention Wi-Fi or smart app connectivity for any of these units. The Mountman 12,000 BTU model is described as lacking smart connectivity. You should assume these units rely on standard remotes unless the product data explicitly lists wireless features.
How do these units compare in efficiency to the Rellytech?
Most alternatives share the same 19 SEER2 efficiency rating as the Rellytech 18,000 BTU model. The COSTWAY, Mountman, Tehanld, Nexaro, and Garvee units all list 19 SEER2. This indicates similar energy consumption rates for cooling. The Rellytech remains a strong option for larger spaces with this efficiency level.
Which model is the lightest to mount?
The COSTWAY 9100 BTU Mini Split is the lightest unit listed. It weighs only 17.6 pounds. This makes installation easier compared to heavier models like the Rellytech, which weighs 112 pounds. The Nexaro is also relatively light at 68 pounds. Consider weight when planning your mounting hardware.
Are there any options for medium rooms around 750 square feet?
Yes. The Mountman, Tehanld, and Nexaro 12,000 BTU models are designed for medium rooms. They all specify a coverage area of 750 square feet. These units provide 19 SEER2 efficiency and run on 230V circuits. They offer a balanced solution between the smaller COSTWAY and the larger Rellytech.
What is the difference between the two Mountman models listed?
Both Mountman models are 12,000 BTU, 230V units with 19 SEER2 efficiency. They share identical dimensions and target 750 square feet. The primary difference is the model number and minor weight specifications in the data. Both serve the same purpose for medium rooms requiring quiet, efficient climate control.