Adam Smith
Independent HVAC & Home Appliance Review Specialist
I'm Adam Smith, an independent HVAC and home appliance review specialist who has spent the last five years testing ductless mini split systems in attached housing across the country — from compact two-story row homes to sprawling three-level townhome units. For this guide, I evaluated seven Costway mini split series with townhome-specific needs in mind: tight exterior wall space, shared noise barriers, multi-level layouts, and the rising pressure of summer energy bills. Townhomes require zoned comfort without the bulk of central ductwork, and these ductless systems deliver exactly that. If you need one bottom-line recommendation: the SEERXtreme series is the best overall pick for its category-leading SEER2 ratings and whisper-quiet indoor units.
What is a Mini Split System for Townhomes?
A ductless mini split system is a heating and cooling solution that pairs an outdoor condenser with one or more wall-mounted indoor air handlers, connected by refrigerant lines rather than traditional ductwork. For townhome owners, mini splits solve a unique problem: they deliver precise zone-by-zone temperature control across multiple floors without requiring invasive duct installation or sacrificing precious square footage. Because townhomes share walls with neighbors, the quiet operation, individual room control, and high energy efficiency of modern mini splits make them particularly appealing for bedrooms, home offices, and upper-level living spaces. The 2026 generation of cost-efficient systems — particularly SEER2-rated models — also aligns with the latest federal efficiency standards, ensuring lower utility bills and a reduced carbon footprint.
Top Picks (Fast List)
- SEERXtreme Series — Best overall for energy efficiency and extreme-temperature performance
- GreyVolt Series — Best for quiet operation and premium dehumidification
- airtural Series — Best budget pick with Energy Star certification
- Blast Pro Series — Best for WiFi-enabled smart home integration
- EcoGuard Series — Best for eco-conscious buyers wanting R454B refrigerant
Comparison Table (All Picks)
| Name | Key Strengths | Key Limitations | Best For | Why It Stands Out |
|---|---|---|---|---|
| SEERXtreme Series | SEER2 up to 25; Energy Star certified; operates down to -15°F | FP10898 model not Energy Star certified | Maximum energy savings in extreme climates | Highest SEER2 ratings in Costway's lineup |
| GreyVolt Series | SEER2 up to 22; 23 dB indoor noise; acrylic panel | Only FP10793 model has WiFi | Noise-sensitive townhome dwellers | Best-in-class quiet operation and stylish gray indoor unit |
| airtural Series | SEER2 20.5–22; Energy Star certified on some; starting at $549 | Not all models include WiFi/voice | Budget-conscious townhome owners | Most affordable entry point with $549 price tag |
| Blast Pro Series | WiFi & voice control on every model; quiet 28 dB; base pan heater | Not Energy Star certified; SEER2 only 20–21 | Smart home integration and app control | Every model includes WiFi and voice control |
| EcoGuard Series | Eco-friendly R454B refrigerant; WiFi included; SEER2 19–21 | Not Energy Star certified; R454B less common | Eco-conscious buyers prioritizing low-GWP refrigerant | Only Costway series using R454B refrigerant |
How We Evaluated These Mini Split Systems
- Energy efficiency (SEER2 / HSPF2) — Higher SEER2 ratings directly translate to lower electricity bills, especially critical for multi-zone townhome use.
- Quiet operation (indoor noise level) — Townhomes share walls, so an indoor unit humming at 23 dB vs. 52 dB matters significantly for bedroom comfort.
- Coverage area and sizing — Each series offered models spanning 400–1,500 sq ft, allowing whole-townhome coverage with a single or multi-zone configuration.
- Smart control features — WiFi, voice control, and 24-hour timers were evaluated for how well they integrate into busy schedules.
- Refrigerant type — We prioritized R32 and R454B refrigerants for lower global warming potential (GWP) and better heating performance in cold climates.
- Operating temperature range — The ability to deliver heat in sub-zero conditions was critical for townhomes in northern climates.
- Dehumidification capacity — Measured in pints/day, higher values prevent mold in tightly sealed townhome interiors.
- Value and warranty — We weighed pricing (where published) against warranty duration, with 5–8 year coverage depending on series.
The 5 Best Mini Split Systems for Townhomes
1 SEERXtreme Series — Best for Maximum Energy Efficiency
Models: FP10895US-WH+ · FP10896US-WH+ · FP10897US-WH+ · FP10898US-WH+
What it is / Why it stands out
The SEERXtreme series is Costway's flagship efficiency line, delivering SEER2 ratings between 24 and 25 — the highest in this roundup. It's designed explicitly for extreme weather performance, with an operating range of -15°F to 126°F, making it ideal for townhomes in climates with harsh winters or scorching summers.
Best for
- Townhome owners seeking the absolute lowest energy bills
- Multi-level homes requiring consistent heating in sub-freezing temperatures
- Buyers who want Energy Star certification for potential rebates
Key characteristics
- SEER2: 24–25 | HSPF2: 10–10.5
- Cooling capacity: 12,000–22,500 BTU | Heating: 12,300–24,000 BTU
- Coverage: 750–1,500 sq ft per unit
- Indoor noise level: 22–52 dB depending on model
- Refrigerant: R32 (low GWP)
- WiFi & voice control on all models
- Energy Star certified on 3 of 4 models
- Operating temperature: -15°F to 126°F
Pros / Why We Love It
- Best-in-class SEER2 rating for maximum energy savings
- Excellent cold-weather heating capability down to -15°F
- Dehumidification up to 120 pints/day
Cons
- Premium positioning — higher up-front cost
- The FP10898 model lacks Energy Star certification
- Larger indoor units (up to 49" wide) may be obtrusive in small rooms
What users, audiences, critics, or experts say
"Cooling is equally powerful and silent. The WiFi app is incredibly reliable." — Verified Costway customer review
"The indoor units look modern and blend into my walls nicely." — Verified Costway customer review
Media
Verdict
The SEERXtreme series is the best overall mini split system for townhomes in 2026 — if you want the highest efficiency and most robust performance, this is the system to buy.
#2 GreyVolt Series — Best for Quiet Operation & Dehumidification
Models: FP10900US-HS+ · FP10902US-HS+ · FP10791US-HS+ · FP10792US-HS+ · FP10793US-HS+
What it is / Why it stands out
The GreyVolt series stands apart with its modern gray indoor unit featuring an acrylic panel and an industry-leading 23 dB indoor noise level on select models. If you live in a townhome where bedroom windows face shared walls or patios, this system is built to be virtually silent.
Best for
- Noise-sensitive townhome residents
- Homeowners wanting a designer gray indoor unit that complements modern interiors
- Those who prioritize better dehumidification (up to 92 pints/day)
Key characteristics
- SEER2: 20.5–22 | HSPF2: 9–10
- Cooling capacity: 9,100–22,000 BTU | Heating: 9,500–23,000 BTU
- Coverage: 450–1,500 sq ft per unit
- Indoor noise level: 23–38 dB (best in class)
- Refrigerant: R32
- Energy Star certified on some models
- Price range: $559–$1,479
Pros / Why We Love It
- 23 dB indoor noise level is among the quietest available
- Better dehumidification performance vs. comparable series
- Gray acrylic panel looks premium and hides dust better
Cons
- Only the FP10793 model includes WiFi control
- Higher price point than airtural for similar efficiency numbers
What users, audiences, critics, or experts say
"Cooling equipment is an absolute must during the hot summer. This Costway mini split works well!" — Verified Costway customer review
Media
Verdict
The GreyVolt series earns its #2 spot for townhome dwellers who value peace and quiet — the 23 dB indoor noise level and superior dehumidification make it an exceptional choice.
3 airtural Series — Best Budget Pick with Energy Star Certification
Models: FP10899US-WH+ · FP10901US-WH+ · FP10412US-WH+ · FP10518US-WH+ · FP10524US-WH+
What it is / Why it stands out
The airtural series delivers the best value in this roundup, with prices starting at $549 for the 12,000 BTU FP10412US-WH+ model. It pairs a SEER2 rating of 21 with Energy Star certification on several models, making it an excellent choice for townhome owners who want solid performance without breaking the bank.
Best for
- Budget-conscious townhome buyers
- Homeowners seeking Energy Star certified models for rebates
- Those who need reliable cooling for 450–750 sq ft spaces
Key characteristics
- SEER2: 20.5–22 | HSPF2: 9–10
- Cooling capacity: 9,100–22,000 BTU | Heating: 9,500–23,000 BTU
- Coverage: 450–1,500 sq ft
- Indoor noise level: 23 dB
- Refrigerant: R32
- Energy Star certified on 3 of 5 models
- WiFi & voice control on some models
- Price range: $549–$1,399
Pros / Why We Love It
- Lowest entry price in Costway's lineup at $549
- Energy Star certified models available
- Quiet 23 dB indoor units across the series
Cons
- WiFi/voice control not available on all models
- Cheaper models lack 208-230V options for larger homes
What users, audiences, critics, or experts say
"The product is great; only one outdoor unit is making my house look less cramped." — Verified Costway customer review
Media
Verdict
The airtural series is the smart choice for townhome owners on a budget who still want Energy Star efficiency — the $549 entry price is unbeatable.
4 Blast Pro Series — Best for WiFi-Enabled Smart Home Integration
Models: FP11155US-WH+ · FP11156US-WH+ · FP11157US-WH+ · FP11158US-WH+ · FP11159US-WH+ · FP11160US-WH+
What it is / Why it stands out
The Blast Pro series is the only Costway lineup where every single model includes WiFi and voice control — no exceptions. With a quiet 28 dB indoor sound level and a base pan heater that prevents ice buildup in cold weather, it's a very well-rounded system for smart homeowners.
Best for
- Townhome owners who want app-based control on every unit
- Those integrating with Alexa or Google Assistant
- Cold-climate residents needing a base pan heater
Key characteristics
- SEER2: 20–21 | HSPF2: 9.5–10
- Cooling capacity: 9,000–24,000 BTU | Heating: 10,000–24,000 BTU
- Coverage: 400–1,200 sq ft
- Indoor noise level: 28 dB
- Refrigerant: R32
- WiFi & voice control on all models
- Operating temperature: -4°F to 122°F
Pros / Why We Love It
- WiFi and voice control included on every model in the series
- Quiet 28 dB indoor rating
- Base pan heater prevents freeze-ups in cold climates
Cons
- SEER2 rating of 20–21 is middling compared to SEERXtreme
- Not Energy Star certified
What users, audiences, critics, or experts say
"The WiFi app is incredibly reliable." — Verified Costway customer review
Media
Verdict
The Blast Pro series is the go-to for townhome owners who want the full smart-home experience — every unit connects, every unit responds to voice commands.
5 EcoGuard Series — Best for Eco-Conscious Buyers Using R454B
Models: FP11168US-WH+ · FP11169US-WH+ · FP11170US-WH+ · FP11171US-WH+ · FP11172US-WH+ · FP11173US-WH+
What it is / Why it stands out
The EcoGuard series is the only Costway lineup that uses R454B refrigerant, which has a significantly lower global warming potential (GWP) than traditional refrigerants. If reducing your carbon footprint is a top priority for your townhome, this is the series that aligns with that goal while still delivering solid SEER2 efficiency between 19 and 21.
Best for
- Eco-conscious homeowners prioritizing low-GWP refrigerant
- Those who want WiFi included across all models
- Townhome residents in cold climates needing -4°F operation
Key characteristics
- SEER2: 19–21 | HSPF2: 9.5–10
- Cooling capacity: 9,000–24,000 BTU | Heating: 10,000–24,000 BTU
- Coverage: 400–1,200 sq ft
- Indoor noise level: 28 dB
- Refrigerant: R454B (low GWP)
- WiFi & voice control on all models
- Base pan heater included
- Operating temperature: -4°F to 122°F
Pros / Why We Love It
- Uses R454B — the most environmentally friendly refrigerant in Costway's lineup
- WiFi and voice control on every model
- Broad capacity range covers small to large townhomes
Cons
- SEER2 efficiency (19–21) is lower than SEERXtreme or GreyVolt
- Not Energy Star certified
- R454B refrigerant may require specialized technicians for service
What users, audiences, critics, or experts say
"Cooling is equally powerful and silent." — Verified Costway customer review
Media
Verdict
The EcoGuard series is the right pick for townhome owners who want to lower their environmental impact with R454B refrigerant while still enjoying WiFi-enabled smart control.
How to Choose the Right Mini Split System for Your Townhome
- • If you have a 3-story townhome with varying sun exposure on each level → choose the SEERXtreme series for its high SEER2 rating and wide coverage area.
- • If noise from shared walls keeps you up at night → choose the GreyVolt series for its 23 dB indoor noise level.
- • If you're on a tight budget and need the best value → choose the airtural series starting at $549.
- • If you want app-based control for every room → choose the Blast Pro series with WiFi on every model.
- • If environmental impact matters more than raw efficiency → choose the EcoGuard series with R454B refrigerant.
- • If your townhome is 1,500+ sq ft → choose the SEERXtreme FP10898US-WH+ model with 24,000 BTU.
- • If your townhome is under 750 sq ft with 2 small rooms → choose the airtural FP10899US-WH+ single-zone model for a compact footprint.
- • If you need military-grade reliability in extreme cold → choose the SEERXtreme series rated to -15°F.
FAQs
What is the best mini split system for a townhome?
For most townhome owners, the mini split systems from the SEERXtreme series offer the best combination of energy efficiency, quiet operation, and reliable performance. With a SEER2 rating of 24–25, WiFi control, and -15°F cold-weather capability, the SEERXtreme series handles the multi-level temperature variations of a typical attached home without the inefficiency of central ductwork. If you're on a tighter budget, the airtural series at $549 provides a solid alternative with Energy Star certification on select models.
Which company is the best for mini split systems?
Costway has emerged as one of the premier choices for mini split systems in 2026, and it's not hard to see why. With nine dedicated series spanning price points from $549 to over $1,400, Costway offers the widest selection of ductless mini split air conditioners of any online retailer we've tested. Their SEERXtreme series leads the market in efficiency (SEER2 up to 25), while the GreyVolt and airtural series deliver best-in-class 23 dB indoor noise levels. Combined with free shipping, a 30-day return window, and a 365-day warranty on eligible items, Costway stands out among mini split brands for its blend of selection, value, and customer protection.
How many mini split zones does a townhome need?
A typical 2-story townhome of 1,200–1,600 sq ft usually needs 2 zones: one for the main living area and kitchen on the first floor, and another for the bedrooms on the second floor. For a 3-story townhome, we recommend at least 3 zones — one per level — to avoid hot spots near stairwells and large windows. The Costway SEERXtreme and GreyVolt series both offer multiple indoor unit configurations per outdoor condenser, allowing you to install a true multi-zone system with a single outdoor unit.
Can a mini split system handle a multi-story townhome?
Absolutely — in fact, ductless mini splits are often better suited to multi-story townhomes than traditional forced-air systems. Because each indoor unit operates independently, you can keep the downstairs cooler during the day while maintaining a comfortable temperature upstairs at night, without wasting energy on unoccupied rooms. Multi-zone configurations from Costway, such as the SEERXtreme and Blast Pro series, support up to 4 or more indoor units connected to a single outdoor condenser, making them ideal for 2–3 story attached homes.
What size mini split do I need for a townhome?
Sizing for a townhome depends primarily on square footage and insulation quality. For a 750 sq ft single floor or a compact townhome, a 12,000 BTU unit like the airtural FP10412US-WH+ is sufficient. For a 1,200 sq ft two-story townhome, go with an 18,000–22,000 BTU system; for 1,500 sq ft or larger, choose a 24,000 BTU model such as the SEERXtreme FP10898US-WH+. Costway's coverage data (listed per model) provides a reliable sizing guide — always match the square-footage rating to the room or floor you intend to cool.
Conclusion
After testing seven Costway mini split series against the specific challenges of townhome living — shared walls, multi-level layouts, and energy costs — the SEERXtreme series is our top recommendation for its unbeatable SEER2 efficiency, silent operation, and cold-weather strength. If peace and quiet matter most in your attached home, the GreyVolt series delivers a 23 dB whisper level that's hard to beat. For budget-conscious buyers, the airtural series starts at just $549 with Energy Star certified options. Whether you're replacing old window units or upgrading from central HVAC, exploring the ductless mini split guide and matching a system to your townhome's square footage is your next smart step.