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Availability:
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Monday, Oct 26
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Set name: 9100BTU, 115V, 20.5 SEER2
Features
- Year-round Comfort: This mini split air conditioner offers 9100 BTU of summer cool and 10000 BTU of winter warmth, covering up to 450 sq ft. Flip through 7 modes (cool, heat, dry, fan, auto, sleep, ECO) and 5 fan speeds (low, mid, high, turbo, auto) for a perfectly tailored breeze every season.
- Higher Energy Efficiency: This advanced inverter mini split air conditioner precisely adjusts compressor speed and constantly fine-tunes output, featuring 20.5 SEER2 cooling and 8.5 HSPF2 heating. It ensures lower costs compared to conventional units. GWP of air conditioning refrigerants is 675.
- User-friendly Design: Featuring chassis electrical heating, the outdoor unit is built for extreme weather use, which can cool even at 48C/118.4For Heat even at -15C/5F. The handy remote control with an 8 m/26 ft effective control distance lets you easily adjust the modes, speeds, timer, swing 4D airflow across the room, switch between C/F and more.
- Ultra Quiet Operation: Running at a low noise of 23 dB and paired with a sleep mode and display off function, this mini split ac unit allows you to enjoy a peaceful sleep. Besides, the built-in 24H timer provides customizable scheduling while saving energy.
- Easy Maintenance & Reliable Use: Maintenance is a breeze thanks to the 58C/137F self-cleaning function and removable & washable filters. In addition, this mini split air conditioner and heater features a child lock that stops tiny fingers from messing with your climate settings, while the auto defrost keeps winter performance ice-free. Note: the installation should be done only by professionals.
Brand: COSTWAY
Capacity: 0.75 tons
Cooling Power: 9100 british thermal units
Special Feature: 4 Way Swing, Dehumidifier, Fast Cooling, Heating & Cooling Function, Remote Controlled
Product Dimensions: 11.5"D x 31.18"W x 7.91"H
Seasonal Energy Efficiency Ratio (SEER): 20.5
Color: White
Voltage: 115 volts_of_alternating_current
Noise Level: 23 db
Refrigerant: R-32
Cooling Power: 9100 british thermal units
Additional Features: 4 Way Swing, Dehumidifier, Fast Cooling, Heating & Cooling Function, Remote Controlled
Color: White
Noise: 23 db
Refrigerant: R-32
Inverter Type: Has Inverter
Installation Type: Split System
Outdoor Unit Compatibility: Requires New Outdoor Unit
Air Conditioner Application: Residential
Voltage: 115 volts_of_alternating_current
Wattage: 1400 watts
Seasonal Energy Efficiency Ratio (SEER): 20.5
Annual Energy Consumption: 1400 watts
Capacity: 0.75 tons
Floor Area: 450 square_feet
Heating Capacity: 10000 BTU
Brand Name: COSTWAY
Model Name: Mini Split
Model Number: 11090-CYFP
Included Components: 1 x Indoor Unit, 1 x Outdoor Unit, 1 x 4 m/13 ft Copper Connection Pipe - Liquid Pipe, 1 x 4 m/13 ft Copper Connection Pipe - Gas Pipe, 1 x 4.5 m/15 ft Communication Wire, 1 x 2 m/6.5 ft Drain Hose, 1 x Remote Control, 1 x Remote Control Holder, 1 x Tape, 1 x Wall Cap, 1 x Putty, 1 x User Guide
Manufacturer: COSTWAY
Item Dimensions D x W x H: 11.5"D x 31.18"W x 7.91"H
Item Weight: 17.6 pounds
Control Method: Remote
Controller Type: Remote Control
Operating Mode: Cooling
Form Factor: Mini-Split
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 26
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Set name: 12000BTU, 115V, 20 SEER
After I finished installing and running it, I must say that I'm very satisfied with the purchase and the quality and results achieved from this item. Using only 120 volts the system runs nearly silently, while the amount of air discharged by the vent is very significant. It took watching a few different videos to fully comprehend the task at hand, but I took my time and went step by step, making one significant exception that I thought could be helpful in colder months, so I routed the condensate drain line on the inside of our garage, and at the bottom I coupled it with some CPVC parts and ran it through the exterior wall so the drain is outside. I did this because in my experience, drain lines can freeze up solid in very cold temps, and shut down a system.....it's happened to me more than once. This way the drain is only really exposed just a few inches outside the fully insulated exterior wall, and should be able to resist freezing.......we'll see how that works out. I used a solid stainless steel support bracket which was tricky to install, since the side to side dimension is inflexible and related to the width between the legs of the outside unit with a very small margin of error allowed. It worked out fine and I was able to give it 10 inches of air space in the back to the wall, enough for proper efficiency of the unit, and also to provide a hidden "alcove" for the coil of lineset that I left intact as it came from the factory. It looks fine, especially since I ordered a "cover kit" for the exterior line set for a neater appearance. I also ordered a sleeve through the wall which I cut to length and caulked in place prior to passing the line set and communication wire through. (As I mentioned, I did not include the drain hose in that bundle) The most apprehensive part was the installation of a new 20 amp circuit at the panel box, which was quite easy after I digested the videos online that clearly depict a safe method of doing that. Using 12-2 copper wire, I fed the circuit partly through the wall, then out and down the inner wall surface before exiting outside to a non-fused quick-connect box that I picked up at Home Depot. The final challenge was to acquire a vacuum pump and manifold gauge set for just over $100.00 to fully evacuate the low pressure side to vent any moisture or unwanted gases, prior to firing up the system. It allowed for a one hour leak-check after shutting the valve at the manifold and turning off the pump after it was given 25 minutes to do it's thing. I feel that I learned quite a bit about some tools and techniques that I was unfamiliar with, but was willing to digest and understand through careful selection of "how-to" videos readily available online. Installed yesterday, it runs great and I love the way it silently moves the air flow up and down as well as from side to side with motorized vanes in the blower compartment. Finally, I can work in my fully insulated garage in comfort year round. I hope the heating is adequate, but in the last year, I found a single small space heater was sufficient to raise the temperature in my garage by enough degrees to make it warm enough to work in comfortably, so if the Split unit isn't very good at heating, as I suspect it will be, I can easily supplement the warming by a simple space heater to easily make it comfortable in winter. I would add that build quality was very good, and was surprised by the amount of pressure released from the smaller high pressure copper line tube when I readied it for connecting with the longer line set to take the line down the exterior to the condenser unit. That indicated that the interior unit's plumbing was air tight from manufacture to my installation, which shows the build quality of that piece. Similarly, the charged condenser was also airtight and with simply using hand wrenching without torque-indicator tools, the system proved easy to connect and insure proper leak free system. I would say that the only possible addition to the system that I would recommend would be to have a simple "on-board" control pad at the inside unit as a failsafe if the remote failed to work properly. But the remote works perfectly so far, so maybe that would just be a waste of resources and just raise the price. For clarity, my unit offered 12,000 BTU's and runs on a 120 Volt 20 Amp circuit. I spent about 595.00 on the Split A/C unit (incl. shipping), and 36.00 on the triangular stainless support bracket, 33.00 on the line cover kit, 23.00 on the thru wall sleeve kit, 10.00 on a 2.5" hole saw, 54.00 for the manifold gauge set, 55.00 on the vacuum pump, for a total of 806.00 (not incl sales tax)......I wasn't thrilled that shipping for the Costway unit was 99.00, but I guess it's a fairly large and somewhat heavy item to ship. (came in two pieces over 2 days apart) So, that's the story, and I'm 'stickin' to it', as they say.
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Reviewed in the United States on August 10, 2025 by Paul R DesRoches
Set name: 18000BTU, 208-230V, 19 SEER
I bought the 18,000 BTU (220V) mini split for my shop. The shop is 1,000 square feet, has insulated walls, but no drywall or insulation on the ceiling. It is open to the attic, so I don’t have the most efficient insulation in the shop. That being said, this unit works very well and keeps my shop comfortable on even the hottest days. It routinely gets into the high 90’s where I live and this little unit seems to be up to the task of cooling my shop. It is so quiet that I can’t hear it running from the other side of the shop. It’s quiet, but it also puts out a lot of air flow. The build quality is better than expected and so is the performance. I was able to DIY this project having very little experience with home HVAC systems. First was the electrical. I located the units as close as I could to the breaker panel in my shop so I didn’t have to run a lot of wires. I used 14/3 romex and installed a disconnect box outside that feeds power to the outside unit. Here is the disconnect box I used. It was about $25- https://www.amazon.com/dp/B000H5YAD6?ref=ppx_yo2ov_dt_b_fed_asin_title Mounting the inside unit is easy with the included cardboard template for marking the holes/drilling. The bracket for hanging the inside unit is included, but you do not get a bracket for the outside unit so if you want to hang it on a wall you will need to buy a bracket or make one yourself. I used this bracket that cost about $35- https://www.amazon.com/dp/B07B77C8T6?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 You will need a holesaw to make a pass-through in the wall for the refrigerant and between unit electrical wires, as well as the drain. I did my drain separately for a number of reasons that aren’t important here. Once both units are mounted you have to run the wiring and the refrigerant pipes between the two units. Be careful when bending the larger copper refrigerant line because it will kink fairly easily when you are not being careful. I ended up removing the insulation and using a bender that would normally be used for bending steel electrical conduit. I already had that and you might not need it if you are patient and work slow. Bends in the larger copper tubing need about at least 6’-7” radius to avoid kinking. Once you are happy with the large line, the smaller line will easily conform to the same shape because it is less prone to kinking on bends of the same radius. Probably the most intimidating aspect of the install was the need to evacuate the air from the system after completing all of the plumbing. I thought I could rent a vacuum pump and gauge set from Autozone, but I wasn’t able to make that work because the fittings are incorrect. Not finding anything that would work for rent locally, I just bought a vacuum pump and gauges from Amazon for about $120 - https://www.amazon.com/dp/B079JJSFQW?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 With the correct vacuum pump and gauges, I was able to easily apply a vacuum for 15 minutes until it was completely evacuated. Then I buttoned everything up, flipped on the breaker and hit the power button on the included remote control. The unit hummed to life and started blowing cold air in seconds. I did have a small issue with one of the plastic components that was included in the system. I called the support telephone number on a Sunday afternoon and was able to speak to someone right away. Even being hard of hearing, I had no trouble understanding the nice lady with a faint accent. She asked for my order number and told me they would be in touch within 24 hours. Later that day I got an email from them asking me for a photo of the problem. I sent the picture and then the next day they emailed me again saying that the part is on the way to my address and it should be there in 12-15 days. The part actually arrived in 6 days and everything is fixed and operating smoothly. I don’t give out 5 star reviews unless I feel the company really deserves 5 stars. In this case, the customer service after the sale was so good, they earned more than 5 stars. Great company, and they stand behind their products.
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Reviewed in the United States on August 11, 2025 by Serge Storms
Set name: 12000BTU, 115V, 20 SEER
This thing is awesome. Unbelievably quiet, I had to walk right up to it to verify it was running. I got it installed in the spring and we had some chilly days yet. The heating function worked great. This will take a nice load off my propane usage. Better yet, we're rolling through our second big heatwave. This unit cools the cabin down quickly and keeps it cool. It has also been very humid and this has pulled the humidity out of the cabin no problem. Cool and dry, it's perfect. Installation is not hard but the manual isn't real clear in some areas. I'd watch some YouTube videos or find someone who has done a mini split before to make sure you get it done right. It wasn't hard though. 5 stars easily.
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Reviewed in the United States on July 27, 2026 by pgdion
Set name: 12000BTU, 115V, 20 SEER
This has been awesome. Cooks gets and heats great. I have in garage area and keeps temp right where we set it. Doesn’t turn off however. Even when desired temp is reached. Still going after a year.
Reviewed in the United States on August 15, 2026 by Bkt5483
Set name: 9000BTU, 208-230V, 17 SEER2
Updated review after a week of observation: The flare joint threw out the copper pipe while its still very tight for a very small movement of the line! All refrigerant blew up! This is a manufacturing defect or design issue. The flare joint is supposed to hold the mechanical small movement stress and allow if required bending of copper pipe but not just blowing out copper pipe line out! I am returning it. Good review after installation: I think its value for money. The most affordable system! One thing I did not observe is this model is 53 DB for noise, I did test after installing with noise meter, it was 45 dB, lower than the product documentation! However I noticed that the new 115V mini split from Costway is 23dB! I got confused and thought all are 23 dB, else I would have ordered 115V mini split only. This model seems old launched in 2017 or 2018, thats why noise level is 45 dB against product documentation of 53 dB. Documentation to install is good, just higher font for labels will make it more readable. Costway also had youtube official video to install which helped, however vacumming was trickly and steps are not clear. Before connecting the lines to outdoor unit, one should ensure the vaccum pump is really sucking from lines. To make sure first connect vaccum pump to to service line before connecting other side of line from indoor unit. Turn on vaccum pump, put your finger other side and ensure its sucking. Now connect the lines and flare properly. The heating side: After installing I tested cooling, it was faster, however when I tested heating, it took few minutes to start heat pump. Not sure if it is normal. I will observe for few more weeks and write more reviews. Overall the product seems to be promising with great price and more value for money. Considering the low price I would rate it 4 to 5.
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Reviewed in the United States on December 14, 2025 by Jai
Set name: 12000BTU, 115V, 20 SEER
It's a great unit. I was extremely surprised by how silent it runs. Remote is quick to adjust temperature and nice they include batteries for remote. I had plenty of lineset and wire for my area I wanted it. This is installed in my enclosed trailer shop build running off a pure sine wave inverter and lithium batteries. Luckily I have a friend with all the hvac tools so install was a breeze. We had to cut the lineset by about 2-3.5 feet and reflare the ends to make it fit the way we wanted which was easy. Vaccum and nitrogen test went great. We had a small nitrogen leak but realized we over tightened the ends. Loosened them up and all good. We had to go through some metal plate and that cut up the insulation so I had to buy some more and reinsulate but that was easy. The fan clicks off for a while periodically when temp is reached but the inside unit is still pumping cool air. It made my shop a wonderful place to be even in 85 degree outside weather. The only reason I knocked off a star is the remote information is lacking. I still don't understand what the auto mode does. You can't set a temp in auto and can't use the temperature sensor on the remote in that mode. So I have just left it in cool but then you cant adjust fan speed in that mode which is odd. I may have to call company and ask because it makes no sense. But it does cool and I turned it on heat one night and I was sweating profusely after a few minutes. So that works well! I wish I would've bought a wifi unit but this does work very well. Well worth the price!
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Reviewed in the United States on September 5, 2025 by FORCEGC
Set name: 12000BTU, 115V, 20 SEER
Great customer service when I need help with a damaged cover and resetting remote to Fahrenheit. Also unit is working very well.
Reviewed in the United States on October 12, 2026 by Lights have stopped working 2 months into having them.
Set name: 12000BTU, 115V, 20 SEER2
Delivered in great time, and both boxes came same day. Arrived in great condition too. Install for a first time installation was daunting but lots of good videos out there. Instructions for operating the remote control are minimal, at best. Yeah it’s easy to just turn it on and get chillin’, but don’t you wanna know what the rest of the options are?? Oh and it doesn’t tell you how to switch from C° to F°! Had to google that too and it was, for me, pressing Heat & Cool simultaneously for 5 secs. Again, not in the manual. For the price it’s a deal! You need to be a DIY’er to install this. It’s not as easy as the MrCool units, but then again, it’s also a thousand bucks cheaper! TIPS: 1) Doing a “back right” install will be easier because the short lines that come off the back will pop right thru the hole you’ll drill thru your wall. That makes connecting the long lines to them much easier because you’ll do that on the outside. If you go “back left” you’ll have to connect the 13’ lines together in the home and then feed it all together, all while holding the wall unit over your head, thru the hole in the wall. 2) If you do the “back left” option you can and should move the condensation hose from the original location on the back right to the back left. There is a little black plug you can pull out on the back left, remove the hose clamp and hose from the back right, swap it to where the plug was, then plug the original hole. This was NOT mentioned anywhere in the instructions. I had to google it and found it is indeed possible. This leaves much more room in the back of the unit to route the refrigerant lines. 3) You will need an HVAC vacuum pump, manifold gauges, and manifold line adapters because the ones you get are typically for automotive or older HVAC fittings. 4) Probably the most annoying thing was I used their template exactly, and the marking for where to drill the big hole in your wall was literally 1/4” too far… so a picky owner will be bothered that you can see the edge of the hole after the unit is placed on the wall. If I were to install another one, I’d cut the hole 1/4” towards center.
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Reviewed in the United States on May 2, 2026 by DesertLife