The 2026 Costway Split AC Collection
Discover the five specialized series designed to master attic temperatures and home comfort.
As an HVAC specialist, I've spent years analyzing how different systems perform in the most demanding environments—specifically finished attics. In 2026, Costway has refined its lineup into five distinct series, each engineered for specific needs. Whether you are battling triple-digit heat in a poorly insulated loft or looking for a whisper-quiet solution for an attic nursery, these energy-efficient cooling systems offer professional-grade performance. My analysis focuses on the unique strengths of the SEERXtreme, Airtural, Blast Pro, GreyVolt, and EcoGuard series to help you make an informed decision for your home renovation.
Understanding the 2026 Series Lineup
Costway's 2026 split AC lineup represents a significant leap in ductless mini split technology. By categorizing their units into five specialized series, they've made it easier for homeowners to match a system to their specific room requirements. These systems all feature inverter technology, which allows the compressor to adjust its speed dynamically, ensuring consistent temperatures and lower energy bills compared to traditional on/off units.
The Five Series at a Glance
- SEERXtreme Series — The flagship for maximum efficiency and extreme weather.
- Airtural Series — The smart choice for compact spaces and quiet bedrooms.
- Blast Pro Series — The value leader focused on gentle, diffused airflow.
- GreyVolt Series — The designer's choice with premium aesthetics and dehumidification.
- EcoGuard Series — The sustainable pioneer using next-gen eco-refrigerants.
Series Comparison Matrix
| Model Name | Cooling Power | Heating Power | Efficiency | Noise Level | Voltage | Smart Control | Heating & Min. Temp. |
|---|---|---|---|---|---|---|---|
| Blast Pro Series | 9,000-24,000 BTU | 10,000-24,000 BTU | 20-21 SEER2 | 28 dB | 115V / 208-230V | WiFi/App/Voice | Yes (-4°F) |
| EcoGuard Series | 9,000-24,000 BTU | 10,000-24,000 BTU | 19-21 SEER2 | 28 dB | 115V / 208-230V | WiFi/App/Voice | Yes (-4°F) |
| Airtural Series | 9,100-22,000 BTU | 9,500-23,000 BTU | 20.5-22 SEER2 | 23 dB | 115V / 208-230V | Partial WiFi/App/Voice | Yes (14°F) |
| GreyVolt Series | 9,100-22,000 BTU | 9,500-23,000 BTU | 20.5-22 SEER2 | 23-38 dB | 115V / 208-230V | Partial WiFi/App/Voice | Yes (19°F) |
| SEERXtreme Series | 12,000-22,500 BTU | 12,300-24,000 BTU | 24-25 SEER2 | 22-52 dB | 115V / 208-230V | WiFi/App/Voice | Yes (-15°F) |
Our Evaluation Criteria
- Thermal Resilience — How well the outdoor compressor handles direct sun and high ambient temperatures.
- Energy Optimization — Analysis of SEER2 ratings and real-world power consumption during peak loads.
- Smart Integration — Testing the responsiveness of the Costway App and voice assistant compatibility.
- Air Quality & Flow — Evaluating filtration systems and the gentleness of the air distribution.
Deep Dive: The 5 Series
1. SEERXtreme Series: The Efficiency King
Overview
The SEERXtreme is Costway's premier home climate control solution. With a SEER2 rating of up to 25, it is designed for those who want the lowest possible utility bills without sacrificing cooling power. It features a robust build that operates flawlessly even when outdoor temperatures hit 126°F.
Best For
- Large, open-concept attic spaces
- Homeowners in extreme southern or desert climates
- Users seeking the quietest possible operation (22dB)
Key Advantages
- Highest energy savings in the lineup
- Advanced heating down to -15°F
- Premium Energy Star certification
Considerations
- Higher upfront investment
- Requires 230V for larger BTU models
Verdict: The definitive choice for long-term value and uncompromising performance.
2. Airtural Series: The Smart Compact
Overview
The Airtural Series is built for modern living. It emphasizes a compact indoor footprint and seamless smart home integration. It's the perfect quiet air conditioner for rooms where wall space is at a premium.
Best For
- Attic offices and guest bedrooms
- 115V options for smaller rooms
- Tech-savvy users who rely on app control
Key Advantages
- Very easy to install and set up
- Sleek, unobtrusive indoor unit
- Excellent WiFi stability
Considerations
- Higher BTU models require 230V
- Standard white finish only
Verdict: A reliable, smart, and space-saving solution for the modern home.
3. Blast Pro Series: The Comfort Specialist
Overview
The Blast Pro Series introduces "Soft Air" technology, which uses a specialized vane design to diffuse air more broadly. This eliminates the "cold blast" effect, making it a top choice for affordable home comfort in smaller living quarters.
Best For
- Attic nurseries or playrooms
- Budget-conscious renovations
- Users sensitive to direct airflow
Key Advantages
- Superior air diffusion technology
- Great balance of price and features
- Includes base pan heater for winter
Considerations
- Slightly higher noise floor (28dB)
- Simple aesthetic design
Verdict: The best "bang for your buck" for everyday attic comfort.
4. GreyVolt Series: The Designer's Choice
Overview
The GreyVolt Series is a smart home appliance that makes a statement. Featuring a unique grey acrylic front panel, it blends perfectly into modern industrial or minimalist attic lofts while offering powerful dehumidification.
Best For
- Modern attic studios and home theaters
- Humid coastal or lakeside environments
- Design-forward interior projects
Key Advantages
- Stunning, high-end visual appeal
- Industry-leading moisture removal
- Quiet and efficient performance
Considerations
- Color may not match traditional decors
- Acrylic panel requires soft-cloth cleaning
Verdict: Where high-end aesthetics meet high-performance engineering.
5. EcoGuard Series: The Green Pioneer
Overview
The EcoGuard Series is the future of sustainable cooling. It is one of the first residential lines to adopt R454B refrigerant, which has a significantly lower Global Warming Potential (GWP) than older standards.
Best For
- Environmentally conscious households
- Future-proofing your home's HVAC system
- Standard residential cooling needs
Key Advantages
- Lowest environmental impact in the lineup
- Compliant with the latest green regulations
- Solid, reliable all-season performance
Considerations
- Newer refrigerant may require specific tools for techs
- Mid-range efficiency (21 SEER2)
Verdict: The responsible choice for the eco-conscious homeowner.
Which Series is Right for You?
Frequently Asked Questions
Are these units easy to install in an attic?
While many homeowners handle the mounting and line-set routing, we always recommend a certified HVAC technician for the final refrigerant connection and electrical work to ensure your warranty remains valid and the system operates safely.
Can I control multiple units from one app?
Yes! The Costway App allows you to group multiple units from any of these series, making it easy to manage your entire home's climate from your smartphone.
What is the warranty on these series?
Costway typically offers a robust warranty on the compressor and parts, often backed by a 90-day return policy for peace of mind during your initial installation.
The 2026 Costway Split AC collection offers a tailored solution for every attic challenge. By choosing the series that aligns with your priorities—be it efficiency, style, or sustainability—you can reclaim your attic space and enjoy year-round comfort. Ready to upgrade your home?