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GreyVolt Series Energy Star Certified 24000 BTU 21 SEER2 208-230V Mini Split Air Conditioner and Heater Gray Wifi Enabled

4.17
4.1759 Reviews
$1,240
Select: GreyVolt 21 SEER2 WiFi Enabled Works at 19℉ Energy Star Certified
EchoCool 17 SEER2 WiFi Enabled Works at 5℉
Blast 18.5 SEER2 Works at 19℉
GreyVolt 21 SEER2 WiFi Enabled Works at 19℉ Energy Star Certified
EcoGuard 21 SEER2 WiFi Enabled Works at -4℉ R454B refrigerant
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Only $45! Mini Split Wall Mounting Bracket

Only $45! Mini Split Wall Mounting Bracket

Only $45! Elevate the performance of your outdoor AC unit with this mini split wall mounting bracket!

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Only $39.99! Official Licensed 2026 FIFA World Cup Mascot Figurines 3-Pack Clutch

Only $39.99! Official Licensed 2026 FIFA World Cup Mascot Figurines 3-Pack Clutch

Relive the energy of the FIFA 2026 World Cup with this officially licensed 3-pack collectible figurine set featuring Clutch, Zayu, and Maple. 

Overview

costway mini split trusted by top mediaGreyVolt Series 9100 BTU 20.5 SEER2 115V WiFi Enabled Mini Split AC Compatible with Alexa GrayThe differences between greyvolt, blast pro, airtural and ecoguard mini splitKey features of greyvolt mini splitGreyVolt Series Energy Star Certified 24000 BTU 21 SEER2 208-230V Mini Split Air Conditioner and Heater Gray Wifi EnabledGreyVolt Series 24000 BTU 21 SEER2 208-230V WiFi Enabled Mini Split AC heating at 19℉GreyVolt Series 24000 BTU 21 SEER2 208-230V WiFi Enabled Mini Split AC with selfclean functionwhy choose costway mini split rather than other brandGreyVolt Series 24000 BTU 21 SEER2 208-230V WiFi Enabled Mini Split AC with up to 8 year warrantyGreyVolt Series 9100 BTU 20.5 SEER2 115V WiFi Enabled Mini Split AC Compatible with Alexa GrayJoin costway HVAC program

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Coverage Area
1500 sq. ft.
1500 sq. ft.
1500 sq. ft.
1200 sq. ft
1500 sq. ft.
SEER2
21
17
18.5
21
21
Operating Ambient Temperature
19℉-118.4℉
5℉-118.4℉
19℉-118.4℉
-4℉-122℉
14℉-122℉
Indoor Noise Level
38 dB
37 dB
23 dB
28 dB
23 dB
Dehumidifying Capacity
92 Pints/Day
122 Pints/Day
115 Pints/Day
131.9 Pints/Day
76 Pints/Day
Refrigeration
R32
R32
R32
R454B
R32
Energy Star Certified
X
X
X
WiFi
X
Warranty
8-Year
5-Year
8-Year
5-Year
8-Year

Trusted by Top Media

Costway’s smart home & cooling solutions, featured across leading outlets.

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  • Reviews

    (59)
  • Q&A

    (19)
4.17
59 Reviews
5
61%
4
8%
3
14%
2
15%
1
2%

Customer say

Most buyers praised the unit's quiet operation, effective cooling/heating, and energy efficiency, especially for spaces 500–1600 sq. ft. Professional installation was commonly recommended. Some noted initial refrigerant issues or installation complexity. WiFi control received mixed feedback. Overall, customers found it good value, reliable, and highly recommendable.

Customer experience distilled with

Customer Photos

Frequent Mentions

  • Great AC

    Perfect for my homestay

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    Customer Photos
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  • This thing is awesome!!

    Installed in my 40 foot camper. Installation was a breeze and this thing puts out some serious air! It’s extremely quiet, you can’t even hear it run. Very impressed especially for the price. Highly recommend!!

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    Customer Photos
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  • Great

    Delivered in a timely manner. Easy to install. Works as it should. 10 out of 10 would recommend

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    Customer Photos
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  • Mini Split

    I bought this for my living room area because I have a dinosaur 4 ton heat pump that runs constantly. So far working great. WiFi program not so great.

    Customer Photos
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  • Air conditioner

    I loved my other Costway mini split so much that I bought a second one. The first one I use in my living room and the second one is in my dining room. They work amazing and the cost is better than any other brand I have looked at. Ian planning on buying more for my bedrooms.

$200

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