Mrcool DIY 12K BTU 4th Gen Energy Star Ductless Mini-Split Air Conditioner
$1,738.00
Price: $479.99 - $1,738.00
(as of Apr 09, 2025 11:32:33 UTC – Details)
Product Description
About MrCool
MrCool ductless mini-split air conditioners and heat pumps are the cutting edge of what modern, flexible fabrication can produce. These air conditioners rely on state-of-the-art manufacturing processes and advanced design to deliver high efficiency air comfort anywhere you need it.
12k BTU 22.5 SEER2 MrCool DIY E Star Ductless Heat Pump Mini Split System
4th Gen – Energy Star Rated – WiFi Smart Kit
The improved, Energy Star rated, 12,000 BTU 4th Gen MrCool DIY E Star ductless mini split now includes the DIYPro Cable, eliminating the need for electrical conduit and providing higher mechanical protection and durability. It can efficiently heat and cool a single room up to 500 Sq.Ft. The Smart HVAC Controller app allows you to control your DIY mini split from anywhere with an internet connection on your Apple or Android smart device and is compatible with Amazon Alexa & Google Assistant.
Low Ambient Cooling Cooling Down To 5°F Auto Restart – Never Lift a Finger Leakage Detection – Protecting Your Investment Sleep Mode 24-Hour Comfort
Easy DIY Installation
Quick Connect Line Set
The included 25′ pre-charged line set allows you to install this innovative ductless system without special tools, equipment, or training.
Smart HVAC Smartphone App
Enhanced Control from Anywhere
Control your MrCool DIY anywhere with your Apple or Android smart device and an internet connection.
Gold Fin Condenser
Corrosion Resistant
Live on the coast? Don’t worry, our condenser is built to resist long term corrosion.
Leakage Detection
Protecting Your Investment
When the MrCool DIY detects low coolant an alarm will sound to alert you to the problem. This will prevent expensive damage to the compressor.
Benefits of life in comfort
Follow Me Function
Personalized Performance
Keep the remote close by, and MrCool DIY will track the air temperature around you to ensure you receive maximum comfort.
Auto Restart
Never Lift a Finger
Power outage? Don’t worry, the MrCool DIY auto restart will pick up where it left off when power is restored.
Low Ambient Cooling
Cooling Down to 5°F
This feature makes the MrCool DIY the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.
Digital Assistant Ready
Amazon Alexa & Google Assistant
The new MrCool Smart HVAC Controller Module and app fully support Google Assistant & Amazon Alexa out of the box.
MrCool DIY 4th Generation E Star Ductless Heat Pump Mini Split System
The MrCool DIY 4th Generation E Star ductless mini splits are made to be easily installed by anyone. No special tools, equipment, or training are required. Because it uses pre-charged Quick Connect line sets, installation typically only takes a few hours. The 4th generation MrCool DIY E Star units have a low refrigerant alarm to help prevent costly repairs. It also has an auto restart feature. In the event of a power outage, when power is restored, your unit will come back on at the previous settings. Is it also equipped with air filter cleaning and replacement alerts, which will notify you to clean the filters after 240 run time hours and to replace them after 3,000 run time hours. These units can also provide low ambient cooling. They are capable of running in cooling mode from as low as 5°F, making them ideal for server rooms, greenhouses, and other applications that require cooling all year.
System Includes:
Outdoor Heat Pump CondenserIndoor Wall Mounted Air HandlerPre-Charged Quick Connect Refrigerant Line SetUpgraded DIYPro CableRemote ControlSmart HVAC Controller Module WiFi Smart KitInstallation Kit
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Customer Reviews
4.3 out of 5 stars 348
4.3 out of 5 stars 348
4.3 out of 5 stars 348
4.3 out of 5 stars 348
Price
$1,738.00$1,738.00 $1,999.99$1,999.99 $2,502.00$2,502.00 $2,688.69$2,688.69
Cooling Capacity
12,000 BTU 18,000 BTU 23,000 BTU 34,500 BTU
Heating Capacity
12,000 BTU 18,000 BTU 25,000 BTU 36,000 BTU
Power Input
115V 208-230V 208-230V 208-230V
Maximum Amps
25 30 35 35
SEER2
22.5 22.7 20.5 18.3
HSPF2-4
9 9.8 9.2 8
Indoor Dimensions (WxDxH)
31.57″x7.44″x11.69″ 42.52″x8.90″x13.19″ 42.52″x8.90″x13.19″ 49.57″x11.10″x14.25″
Outdoor Dimensions (WxDxH)
30.12″x11.93″x21.85″ 35.04″x13.46″x26.50″ 37.24″x16.14″x31.89″ 37.24″x16.14″x31.89″
Recommended Area
500 Sq.Ft. 750 Sq.Ft. 1,000 Sq.Ft. 1,500 Sq.Ft.
Energy Star
✓
✓
✓
no data
Energy Star certified 22 SEER, 11.5 HSPF
Customers say
Customers find the air conditioner easy to install, with clear instructions, and appreciate its performance, particularly its ability to cool better than heat. Moreover, the unit is quiet both inside and out, and customers consider it well worth the money, beating the cost of HVAC systems. Additionally, they like its energy efficiency and writing quality. However, the build quality receives mixed feedback, with some saying it’s very good made while others note it’s not as robust as expected.
AI-generated from the text of customer reviews
4 reviews for Mrcool DIY 12K BTU 4th Gen Energy Star Ductless Mini-Split Air Conditioner
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$1,738.00
Team Matthias –
Mr. Cool Split 12k BTU is amazing!
Well, so farâ¦.so wonderful! We watched videos and read the instruction, first of all. Hubby then laid out all the parts and they were all intact, well packed too. He then poured a concrete pad for the outside compressor and allowed it to dry and cure. Once he knew everything was ready, he took his time, a few hours, and installed the unit. WOW, AMAZING! Both inside and outside units are whisper quiet; canât really hear the inside unit on the other side of the room. When I returned home from work, we installed the USB unit so we could control the system remotely from the app and from Alexaâ¦.this is great!Please be sure you take your time and follow instructions. Watch some YouTube videos, good ones, because there are definitely some lousy ones that will get you into trouble during install. All said and done? The install was easy and this unit will save you so much money because you donât need to hire a pro.Cooling and Heating is so comfortable, without blowing hard or loudly into the room. The fan mode works well, as well. Right now I canno say enough about this systemâ¦.wish we wouldâve purchased this years ago.Good luck and I hope you enjoy your Mr. Cool as much as we do.Will add indoor pics soon.UPDATE: Weâve been using this unit daily and are absolutely impressed! We live in the desert so this time of year morning temps are in the 40s and daytime in the 80s, therefore we use AC and heat in the same day and this Mr. Cool is impressive, to say the least. Iâm so hoping it is quality and holds up because weâre so happy with this purchase.
Christine –
Easy install
Great directions and we installed it ourselves. The process went smoothly but my husband has a lot of experience with wiring, which was explained really well in the instructions. Its really depends how comfortable you are with electricity. We had to install a separate elec. panel with switch and a junction box attached to the house. One unit was enough for our 1300 square foot house with low ceilings. Its quiet and delivers consistent heat. Since its winter I’m not sure about cooling. One thing I will say is when it was really cold, 30s the unit shut off and came up with letters DF but it comes back on after defrost. The outside compressor is out in the open and we get a lot of wind. This summer we’ll build a semi shelter around a few sides and over the top for shade which is recommended and I think would help with it icing up as well.
Robert S. –
SUMMER TEMPS OVER 105°f? This is your unit.
It has been in service since I installed it almost 18 months ago. No issues whatsoever with the unit that is the18k model installed in a 24ft wide x 24ft long x 8ft tall (ceiling) garage in Glendale Arizona.I can confirm with this square footage having partially insulated walls and mostly insulated single garage door with a 2nd story above, the 18k unit is sized effectively. If you live in a lower temp environment you could get away with 12k but a hot vehicle pulled in to the garage. Will make the unit work for a few hours. In that scenario, this should be the proper size for most two car garages, regardless of the climate.Do your own research, of course. However, I did a great deal of research on mini split units all the way from Mitsubishi down to knock-off Chinese units. regardless of the manufacturer, most units are not rated for outside temperatures above 108°F, MrCool DIYâs are and they provide proof and testing on their site.So if you live in warmer climate, knock off Chinese units are not designed for high outside temperatures, and a majority of them will disable themselves when temperatures go above 105°f as they have an ambient temperature sensor on the outside unit that keeps them from overheating.I can confirm that this unit works effectively at Arizona desert temperatures over 120°f. Of course there is a large efficiency lost at that temperature but the ratings provided by the company prove this unit is more efficient than brands three times the cost.In fact, I canât find a mini split unit on the market regardless of cost that has the same efficiency at temperatures over 115.°f.Yes, someone that is a home DIYer can install this unit themselves.However, I highly recommend you hire an electrician to run your disconnect.. everything else most DIYers should and can do. I know (and can look up) NEC and local codes. But if you cause an electrical fire by a faulty install, good luck getting a payout from your homeowners insurance. Same story if you sell your home with the unit attached and it wasnât installed to code. And yes, running your disconnect could cost anywhere from $300-1200, but thatâs life.Some have stated these units leak. My unit has not lost efficiency and Iâve monitored monthly kilowatt draw since last year and itâs pretty consistent.I did hook up a manifold gauge, and the pressure is low based manufacturer spec for target super heat.However, I assume that it was a loss in the hose or possibly initial seepage on the quick connect (I didnât leak check after install).I read low pressure/charge as a common theme with these quick connects. I have been told the line set is charged with R410a and so is the unit. However, if this is incorrect or there was a slight seepage while in the box or during initial connect, that would explain the current levels. Itâs fractionally low and probably losing 15% efficiency. You can buy small one time bottles on the Internet to charge mini splits that come with a gauge, you can pick one of these up and I recommend you do, no HVACR-EPA license needed. I havenât charged mine since I need to move my main house split unit and Iâll wait till I buy a full R 410a tank.When the temp is below 90° outside, keeping my garage at 78°, I barely see much change in my kilowatt usage total for my home. Results may vary.. However this unit is hugely efficientI also feel keeping the garage below 100° keeps heat ingress out of my house, thereby raising the efficiency of my main unit.@@NOTE: I am also using MRCOOLâs wall mount for the unit. The unit will produce a low frequency vibration, though it comes with rubber feet, which help with mid frequency, if you will attach this to your house, you will hear the unit running when the home is quiet. For me itâs only noticeable when itâs dead quiet in the house and Iâm on that side. My guess have never been able to hear it. So Iâm probably neurotic. lol
Brian –
Truly DIY
I purchased this with some curiosity whether it was truly DIY and was pleasantly surprised that it was. You do have to have electrical knowledge or have an electrician do the wiring. The instructions along with some Youtube videos definitely helped. I am pretty handy overall but I found this to be pretty straight forward to install. For function it works fantastic. I have it in a very well insulated Workshop, but it maintains the temp and humidity better than expected. on a 30 degree day it was blowing 95 degree air when demanded. It did struggle when temp was below 15 and could not maintain 62 degrees at night. It was routinely going in to defrost mode and during that time it isnt heating. I was not surprised by this heat pumps routinely struggle in low temps this does better than an older mini-split system i have but still isnt a heater during very cold periods.