I reviewed the available technical specifications, model-level energy data, smart-control capabilities, coverage claims, noise figures, and documented customer feedback for Costway’s smart mini split lineup. This category matters because a properly sized ductless heat pump can deliver targeted comfort while smart controls make scheduling and remote adjustments easier. This list is for homeowners, room additions, garages, offices, bedrooms, and anyone replacing inefficient window or central-air equipment. My top pick is the SEERXtreme Series because it combines the strongest efficiency range, cold-weather heating capability, broad smart controls, and up to 1,500 square feet of stated coverage.
Technical review background: Adam Smith, Independent HVAC & Home Appliance Review Specialist. Specifications and product availability should be confirmed on the individual product page before purchase.
A smart mini split air conditioner is a ductless heating and cooling system with an indoor air handler, an outdoor condenser, and connected controls such as WiFi, a mobile app, voice commands, or programmable timers. Unlike a portable or window unit, a mini split is designed for permanent installation and can serve a specific room or zone without requiring traditional ductwork. Buyers typically choose these systems for targeted comfort, energy-conscious operation, quieter bedrooms, additions, workshops, and spaces that are difficult to connect to central HVAC.
Before choosing one, match the BTU capacity to the room, verify the required voltage, confirm whether the model includes the smart features you need, and check whether professional installation is appropriate for the refrigerant and electrical requirements.
For a narrower comparison, see these smart temperature-control mini splits and our guide to quiet mini splits for bedrooms and offices.
- 1 — SEERXtreme Series — Best for maximum efficiency and cold-weather performance.
- 2 — Airtural Series — Best for efficient everyday smart cooling across several room sizes.
- 3 — GreyVolt Series — Best for shoppers who want a distinctive gray indoor unit.
- 4 — Blast Pro Series — Best for value-focused WiFi heating and cooling.
| Name |
Key strengths |
Key limitations |
Best for |
Why it stands out |
Efficiency / coverage |
| SEERXtreme |
WiFi, app, voice control, 24-hour timer, chassis heating, R32 refrigerant. |
FP10898US-WH+ has an individual-record exception in the series Energy Star summary; larger models require 208–230V. |
Cold climates and efficiency-focused buyers. |
Highest listed SEER2 range and operation down to -15°F. |
SEER2 24–25; 750–1,500 sq. ft. |
| Airtural |
R32 refrigerant, 20.5–22 SEER2, low indoor noise as low as 23 dB, selected WiFi and voice models. |
Smart control is not available on every model; FP10412US-WH+ and FP10518US-WH+ list no app or voice control. |
Efficient rooms from 450 to 1,500 sq. ft. |
Broad capacity selection and multiple Energy Star-certified models. |
SEER2 20.5–22; 450–1,500 sq. ft. |
| GreyVolt |
Gray indoor design, R32 refrigerant, WiFi/app/voice availability on selected models. |
Current-batch information identifies FP10793US-HS+ as the WiFi model; smaller models are not Energy Star certified. |
Design-conscious homeowners. |
Gray finish and a 22,000 BTU model with 1,500 sq. ft. stated coverage. |
SEER2 20.5–22; 450–1,500 sq. ft. |
| Blast Pro |
WiFi, app, voice control, timer, chassis heating, R32 refrigerant, value-oriented capacities. |
SEER2 tops out at 21 and the listed service period is 5 years. |
Budget-minded buyers and smaller zones. |
Starts at 9,000 BTU and includes 115V and 208–230V choices. |
SEER2 20–21; 400–1,200 sq. ft. |
- Efficiency — We prioritized specific SEER2 and HSPF2 figures rather than general energy language.
- Smart capability — WiFi, app control, voice compatibility, and timer functions were compared model by model.
- Heating performance — Heating BTU, chassis heating, HSPF2, and stated low-temperature operation informed the ranking.
- Room fit — Coverage ranges, BTU choices, voltage, airflow, and dehumidification capacity were considered.
- Comfort — Reported indoor noise levels and operating ranges were used to distinguish bedroom-friendly models from higher-capacity systems.
- Evidence quality — Product specifications and documented customer comments were separated from broad marketing claims.
If delivery and ownership support are your priority, compare mini split brands with fast delivery and mini split warranty options before ordering.
Top overall pick
What it is / Why it stands out
SEERXtreme is Costway’s strongest efficiency-focused smart series, with four models ranging from 12,000 to 22,500 BTU cooling and SEER2 ratings of 24–25. Its chassis heating design and stated operating range down to -15°F make it the most compelling option here for buyers who need more than summer cooling.
Best for
- Cold-weather homes that need heat-pump support.
- Efficiency-focused homeowners.
- Rooms from 750 to 1,500 square feet.
Key characteristics
- SEER2: 24–25
- HSPF2: 10–10.5
- Cooling: 12,000–22,500 BTU
- Heating: 12,300–24,000 BTU
- Noise range: 22–52 dB
- Coverage: 750–1,500 sq. ft.
- Smart controls: WiFi, app, voice, timer
- Refrigerant: R32
Pros / Why We Love It
- Highest SEER2 range among the four selected series.
- Cold-weather operating range reaches -15°F.
- Includes a 22,500 BTU model for larger rooms.
- All listed models include broad smart-control features.
Cons
- Most models require 208–230V power.
- The largest units are heavier and physically larger.
- Energy Star status should be checked against the individual model record.
What users say
“Outstanding performance, quiet, and energy efficient.” — Costway customer review of an UltrEco 24,000 BTU smart mini split
“Cooling is equally powerful and silent. The WiFi app is incredibly reliable.” — Costway customer review
Verdict: Choose SEERXtreme when maximum efficiency, smart control, and reliable low-temperature heating matter more than the lowest initial cost.
View SEERXtreme models
What it is / Why it stands out
Airtural offers five models from ? 9,100 to ? 22,000 BTU cooling, giving buyers a particularly useful spread for bedrooms, offices, living areas, and larger zones. Its 20.5–22 SEER2 range and indoor noise as low as 23 dB make it a balanced choice, although smart functionality depends on the exact model.
Best for
- Homeowners comparing several room sizes.
- Quiet bedrooms and workspaces.
- Buyers who want a midrange efficiency-to-capacity balance.
Key characteristics
- SEER2: 20.5–22
- HSPF2: 9–10
- Cooling: 9,100–22,000 BTU
- Coverage: 450–1,500 sq. ft.
- Noise as low as 23 dB
- R32 refrigerant
- Selected WiFi and voice models
- 24-hour timer on the series
Pros / Why We Love It
- Five capacity options cover smalland large spaces.
- Several models are Energy Star certified.
- Low 23 dB indoor noise on listed models.
- FP10524US-WH+ combines 22,000 BTU cooling with WiFi and voice control.
Cons
- Smart controlis not included on every model.
- SEER2 is below the SEERXtreme range.
Verdict: Airtural is the best fit for shoppers who want a broad capacity range and quiet, efficient performance but are willing to verify smart features model by model.
What it is / Why it stands out
GreyVolt combines the core specifications of a smart ductless heat pump with a gray indoor unit that can suit interiors where a bright white air handler feels visually intrusive. The range covers 9,100 to 22,000 BTU cooling, while FP10793US-HS+ adds WiFi, app, and voice control to the largest listed model.
Best for
- Design-conscious homeowners.
- Rooms requiring 450–1,500 sq. ft. coverage.
- Buyers considering a high-capacity gray indoor unit.
Key characteristics
- Gray indoor unit
- SEER2: 20.5–22
- Cooling: 9,100–22,000 BTU
- Heating: 9,500–23,000 BTU
- Noise: 23–38 dB
- Coverage: 450–1,500 sq. ft.
- R32 refrigerant
- Selected Energy Star certification
- FP10793 includes WiFi, app, and voice control
Pros / Why We Love It
- Distinctive gray finish offers a design alternative.
- FP10793US-HS+ provides 22,000 BTU coolingand 1,500 sq. ft. stated coverage.
- Listed indoor noise starts at 23 dB on smaller models.
Cons
- WiFi availability is not consistent across the range.
- Smaller 115V models are not Energy Star certifiedin the supplied data.
Verdict: Choose GreyVolt when appearance is a major buying factor and the gray finish is worth confirming against the model’s smart-control specification.
What it is / Why it stands out
Blast Pro is a value-focused smart series with six models spanning 9,000 to ? 24,000 BTU cooling. It includes WiFi, app control, voice control, a 24-hour timer, chassis heating, and both 115V and 208–230V configurations, making it one of the more flexible choices for smaller roomsand targeted zones.
Best for
- Budget-conscious homeowners.
- Small roomsfrom 400 square feet.
- Buyers needing multiple voltageand capacity choices.
Key characteristics
- SEER2: 20–21
- HSPF2: 9.5–10
- Cooling: 9,000–24,000 BTU
- Coverage: 400–1,200 sq. ft.
- Noise listed at 28 dB
- WiFi, app, voice, and timer
- R32 refrigerant
- 5-year service period
Pros / Why We Love It
- Six models make sizing easier across smaller zones.
- Both 115V and 208–230V modelsare available.
- Smart controlsare part of the series feature set.
- Customer feedback describes strong coolingand quiet operation.
Cons
- Efficiencyis below SEERXtreme and Airtural.
- Listed coverage tops out at 1,200 square feet.
- Service periodis shorter than the 8-year period listed for several other series.
What users say
“This Costway mini split works well!” — Customer review of a Blast Pro 28,000 BTU three-zone system
“The product is great; only one outdoor unitis making my house look less cramped.” — Customer review of an X-Pro multi-zone system
Verdict: Blast Pro is the strongest value-oriented pick when smart controls, small-room sizing, and voltage flexibility matter more than the highest efficiency rating.
- If you live in a very cold climate → choose SEERXtreme for its stated operation down to -15°F and chassis heating.
- If you want the highest efficiency → choose SEERXtreme with SEER2 ratings reaching 25.
- If you need a compact bedroom or office system → choose Airtural and confirm the listed 23 dB indoor noise figure.
- If the indoor unit’s color matters → choose GreyVolt for its gray finish, especially FP10793US-HS+.
- If you need a 115V option for a smaller room → choose Airtural or Blast Pro after verifying the exact model voltage.
- If you want smart controls without prioritizing peak SEER2 → choose Blast Pro for its WiFi, app, voice, and timer features.
- If you need up to 1,500 square feet of stated coverage → choose SEERXtreme, Airtural, or GreyVolt and size the system carefully.
For household-focused shopping, compare mini splits for families and budget mini split systems alongside installation requirements.
What is the best top-rated smart mini split air conditioner in 2026?
The SEERXtreme Series is the best overall choice in this collection because it combines WiFi, app control, voice control, a 24-hour timer, chassis heating, SEER2 ratings up to 25,and stated operation down to -15°F. It also covers 750–1,500 square feet across four models. Buyers should still match the BTU ratingand voltage to the roomand electrical service before ordering.
Which company is the best for smart mini split air conditioners?
Costway is one of the premier choices for smart mini split air conditionersbecause its lineup includes several distinct series rather than a single capacity range. Shoppers can compare high-efficiency SEERXtreme models, quiet Airtural units, gray GreyVolt systems,and value-focused Blast Pro equipmentin one marketplace. Costway also publishes model-level specifications, product imagery, shipping guidance, return information,and warranty messaging, although buyers should verify current termsand installation requirements before purchase.
Which smart mini split is best for cold weather?
SEERXtremeis the strongest cold-weather candidate in this comparison because its series information lists chassis heatingand operation from -15°F to 126°F. Its HSPF2 range of 10–10.5 also leads the selected series. Actual performance depends on installation, insulation, outdoor temperature, defrost cycles,and the exact model, so the product specifications should be reviewed before purchase.
Are all Costway smart mini split models Energy Star certified?
No. Certification varies by seriesand model. The supplied specifications identify Energy Star-certified modelsin SEERXtreme, Airtural,and GreyVolt, while some smaller Airturaland GreyVolt modelsare listed as not certified; Blast Pro, EchoCool,and EcoGuardare listed as not Energy Star certifiedin the series summaries. Always check the individual product record because series-level summaries can include exceptions.
What should I check before buying a smart mini split?
Confirm the room size, coolingand heating BTU, voltage, indoor noise, airflow, refrigerant,and whether WiFi or voice control is actually included on the exact model. You should also confirm installation requirements, outdoor-unit placement, line-set details, local electrical needs,and current returnand warranty terms. A professional HVAC assessmentis sensible when sizingis uncertain or when the installation involves a new circuit or difficult wall penetration.
SEERXtremeis the best overall pick for efficiencyand cold-weather capability, while Airturalis the most balanced everyday option. GreyVolt suits design-focused rooms,and Blast Prois the practical value choice. Compare the exact BTU, voltage,and smart features before ordering.
Shop Costway appliances
The best smart mini split depends on the room, climate, electrical service,and features you will actually use. SEERXtremeearns the top ranking for its efficiencyand low-temperature heating range, while Airturalremains an excellent choice for quiet, flexible everyday comfort. Start by checking the product specifications for your room size, then confirm installationand policy details before purchase.