SEERXtreme Series ENERGY STAR Certified 12000 BTU 24 SEER2 115V Mini Split Heat Pump Heating at -25℃
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Overview
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Q&A
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Overview
● Heating in frigid temperatures as low as -25℃ with built-in chassis electrical heating system
● Fast cooling and heating with the powerful compressor and heat pump
● Stable, silent, and efficient performance thanks to the inverter technology
● Boasts ENERGY STAR, ETL and AHRI certifications
● Allows you to control your unit remotely with the free app
● Works with Alexa for convenient voice control
● Built in 7 modes for all-season use
● 4 fan speeds (low, mid, high, turbo) meet personal needs
● Remote control a temperature unit switch (℉/℃)
● Features up and down, left and right adjustable airflow for wide coverage
● Ensures comfy sleeping environment with screen off function and 24H timer
● High-temp self cleaning can keep your air fresh
● Self-cleaning operation: condensation, frost, melting, sterilization
● Equipped with removable and washable filters
● Uses green and energy-efficient R32 refrigerant
● About 30% energy cost saved compared normal air conditioners
● Comes with comprehensive installation kit
How to Install a Costway Ductless Mini Split Air Conditioner
Reviews
Frequent Mentions
- V
Excellent AC
05/24/2026Installed 2 and it works perfectly. Not yet experienced during winter but it will be fine with heating baseboards.
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Preview - V
Confirmed providing heat at -17C
03/23/2026Very energy efficient, gentle warm air with many fan speed, very quiet. No problem to keep 55 sq-m space at the set 21C temperature this winter so far. Come with everything from the picture, plus extra 2M of 12/3 wire for 115V AC line (not shown). High SEER2, 115V, best offer from Costway. Bought a 2nd Unit. A/C feature to check out when the summer comes.
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Preview - J
Im telling you
03/17/2026This is by far the easiest mini split to install I’ve ever done and The operation of this unit is very simple. I’ve had it for over a year no problems, but it still to this day. I’m looking to buy another one.
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Preview - F
Perfect for My Cabin! Efficient, Quiet & Smart!
03/16/2026I installed this 12,000 BTU mini split in my cozy wooden cabin and I’m beyond impressed. I hired a pro and the installation is about 4 hours. The unit looks sleek and modern, blending perfectly with the wood-paneled walls.
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Preview - D
Easy and functional
11/25/2025This works amazing. Put into a tiny home and still is going strong. Easy to install and took no time to do.
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Preview
Q&A
- Q:How to connect to wifi no clear instructions and I don’t see the unit on my phoneA:To connect your unit to Wi-Fi, please follow these steps: 1. Ensure the unit is powered ON. 2. Press the ""Health"" button on the remote control eight times consecutively. You should hear two beeps from the buzzer, indicating that the unit is ready to connect to Wi-Fi. 3. Make sure your phone is connected to the same 2.4GHz Wi-Fi network. 4. If you still cannot see the unit on your phone, please check if the Wi-Fi module is properly plugged in. You may need to open the indoor unit panel and re-plug the Wi-Fi module to ensure it is secure.
Costway representative - Q:Why are the 14 AWG and 18 AWG wire harnesses sent with this model when the MOP / max fuse ( fusible Max. ) is 25 Amp both wire harnesses are under rated and are a possible fire hazard or meltdown. What can you do for me about this ?A:Thank you for your concern. The 14 AWG and 18 AWG wire harnesses are used for internal control circuits, not for carrying the full 25A load. The MOP rating applies to the main power supply, which requires properly sized field wiring per installation codes. All included wiring meets safety requirements for its intended use. If preferred, you may use your own compliant wiring for installation.
Costway representative - Q:How many amps does the outdoor unit draw?A:The outdoor unit has a maximum input current of 15A. The rated current for cooling is 9.5A, and for heating, it is 9A.
Costway representative - Q:Bonjour, l'affichage clignote de temps en temps et le diffuseur s'ajuste en position haute, ça dure 10 a 15 minutes et ensuite elle abaisse le volet et se remet a chauffer normalement. Pas trouvé d'information dans le manuel pour cela.A:Bonjour ! Je vous recommande de contacter notre service client pour obtenir une assistance plus détaillée sur ce problème. Ils pourront vous fournir des conseils adaptés et vous aider à résoudre cette situation. Merci de votre compréhension !
Costway representative - Q:What is the QMID (qualified manufacture identification number) to when filing for the IRS tax creditA:QMID: I7W0
Costway representative - Q:Is this eligible for the 30% Federal Tax Credit. I found the item linked on this page: https://blog.costway.com/mini-split-air-conditioners/a-complete-guide-to-the-30-federal-tax-credit-for-costway-mini-split-air-conditioners.html If so what is the QMID (qualified manufacture identification number).A:QMID: I7W0
Costway representative - Q:What is the lowest temp for operating this oneA:The lowest operating temperature for the unit is -7 degrees Celsius. Below this temperature, the heating performance may decrease or the unit may stop functioning properly in heating mode.
Costway representativeQ:Will this unit heatup the room in -25 degrees extreme winter?A:The unit is designed to operate in heating mode at outdoor temperatures as low as -25°C. However, it is important to note that the heating efficiency may diminish significantly at such low temperatures. For optimal performance, it is recommended to use the unit in conditions where the outdoor temperature is above -7°C (19.4°F) for effective heating. Therefore, while it can technically operate at -25°C, its heating capability may not be sufficient to effectively warm the room under those extreme conditions.
Costway representative - Q:What is the current draw on startup?A:The maximum input current for the unit is 12.5A during startup.
Costway representative - Q:What does the dry setting do? I'm looking to only control humidity in my garage. Will the dry setting do the job?A:Under dehumidification mode, it cannot change the humidity, it is fixed. It doesn't refer to a precise humidity level like with a dedicated dehumidifier. The air conditioner's dehumidification function works differently and isn't as accurate. The actual humidity level largely depends on the room size. For example, in a smaller space like a 10–15 sqm bedroom, it might reduce humidity to around 40%. In a larger area, such as a 30 sqm living room, the humidity would likely stay around 50%.
Costway representative - Q:Hello, what is the AHRI certificate number for the 12000 btu 24 SEER2 115V unit?A:The AHRI certificate number for the 12000 BTU 24 SEER2 115V unit is 215876633.
Costway representative
Manuals
C$250
