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MRCOOL COMFORT MADE SIMPLE

MRCOOL DIY-18-HP-WM-230C25 DIY 18k BTU 4th gen Energy Star Ductless Heat Pump System

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Availability: Only 3 left in stock, order soon!
Fulfilled by Spreetail
Arrives Aug 27 – Aug 30
Order within 6 hours and 52 minutes
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Style: 18K


Size: 1 Count (Pack of 1)


Features

  • Energy Star certified 22 SEER, 11.5 HSPF

Description

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. The improved, Energy Star rated, 18,000 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 750 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. 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. Enhanced Control from Anywhere Control your MrCool DIY anywhere with your Apple or Android smart device and an internet connection. Corrosion Resistant Live on the coast? Don’t worry, our condenser is built to resist long term corrosion. 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. Personalized Performance Keep the remote close by, and MrCool DIY will track the air temperature around you to ensure you receive maximum comfort. 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. 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. Amazon Alexa & Google Assistant The new MrCool Smart HVAC Controller Module and app fully support Google Assistant & Amazon Alexa out of the box. The 18k 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. This unit outputs 18,000 BTUs, which typically can cover approximately 750 square feet. 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:

Brand: MRCOOL COMFORT MADE SIMPLE


Capacity: 1.5 tons


Cooling Power: 18000 british thermal units


Special Feature: Easy DIY Installation, Precharged R-410 Quick Connect Line Set, Pre-charged linesets allow you to install this innovative ductless system without special tools, equipment, or training., Energy Star-Certified Efficiency. Going above and beyond for efficiency while maintaining optimum performance and reliability, the 12K, 18K and 24K models are Energy Star Certified., Enhanced control from anywhere. Control your MRCOOL DIY anywhere with your Apple or Android smart device and an internet connection., Features leakage detection. When the MRCOOL DIY® detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain high air comfort., Low ambient cooling feature allows for cooling down to 5 degrees for any application that requires cooling all year. Auto restart feature will start your Mrcool automatically after a power outage when the power is restored See more


Product Dimensions: 16"D x 26"W x 36"H


Seasonal Energy Efficiency Ratio (SEER): 22


Color: White


Voltage: 230


Noise Level: 31 db


Refrigerant: R-410A


Cooling Power: 18000 british thermal units


Additional Features: Easy DIY Installation, Precharged R-410 Quick Connect Line Set, Pre-charged linesets allow you to install this innovative ductless system without special tools, equipment, or training., Energy Star-Certified Efficiency. Going above and beyond for efficiency while maintaining optimum performance and reliability, the 12K, 18K and 24K models are Energy Star Certified., Enhanced control from anywhere. Control your MRCOOL DIY anywhere with your Apple or Android smart device and an internet connection., Features leakage detection. When the MRCOOL DIY® detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain high air comfort., Low ambient cooling feature allows for cooling down to 5 degrees for any application that requires cooling all year. Auto restart feature will start your Mrcool automatically after a power outage when the power is restored


Color: White


Noise: 31 db


Refrigerant: R-410A


Filter Type: Nylon


Inverter Type: Has Inverter


Installation Type: Split System


Compressor Type: Rotary


Air Conditioner Application: Residential


Core Material: Aluminium Alloy


Voltage: 230


Power Source: Corded Electric


Wattage: 30


Seasonal Energy Efficiency Ratio (SEER): 22


Efficiency: High


Annual Energy Consumption: 22.7 kwh


Air Flow Efficiency: 452.5 cubic_feet_per_minute_per_watt


Capacity: 1.5 tons


Floor Area: 750 square_feet


Form Factor: Mini-Split


Brand Name: MRCOOL COMFORT MADE SIMPLE


Model Name: 4th gen Energy Star Ductless Mini-Split


Model Number: DIY-18-HP-WM-230C25


Unit Count: 1 Count


Included Components: Ductless Mini-Split


UPC: 810035935167


Manufacturer: MRCOOL


Item Type Name: Ductless Mini-Split


Warranty Description: Manufacturer


Item Dimensions D x W x H: 16"D x 26"W x 36"H


Item Weight: 100 pounds


Window Opening Maximum Width: 26 inches


Window Opening Minimum Width: 26 inches


Control Method: App, Remote, Voice


Controller Type: Remote Control


Warranty Type: Limited


BEE Star Rating: 1 Star


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 27 – Aug 30

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.

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Similar Products

Top Amazon Reviews

    • Easiest of all the DIY units
Style: 18K Size: 18k
I did extensive research on the do-it-yourself style mini splits for my 20x40 shop and decided on this one for various reasons. First, I got quotes from local HVAC companies and the range for my shop was between $3000-$4000. For that price, I could buy 2 Mr Cool units. The reason I got the quotes was because most of the brand name, high rated companies like LG and Mitsubishi come with long warranties - like 10-15 yrs. The do it yourself brands are much less - less than 5 years. But, again, after I got the quotes, it was a no brainer. I recommend going to their website, reading the installation instructions, watching the videos, and having someone help since the outside and inside units are heavy and bulky to try to do alone. I followed the instructions and it was very easy to install. I did my electrical work one afternoon and installed the entire system the next day. The system is a “smart” unit which basically means it is Wi-Fi capable, has an app, can adjust the temps in “Eco” mode, and is very easy to use. I live in east Texas so the highs stay around 95-100 with a heat index around 110 for 4-6 weeks every August. I programmed the system to stay at 82 (which is probably an actual temp around 78) so I essentially have a climate controlled storage area/shop. If I’m going to be in the shop when I’m getting off work, I go on the app and set the temp to 74 so it’s cooling when I get home. It does not seem to struggle to keep at 82 and can cool down the space in less than an hour. Be aware that, apparently, all of the mini splits’ indoor fans run continuously. At least that’s been my experience after asking multiple people. However, the noise on both the fan inside and the outdoor unit are extremely quiet and I haven’t seen a major increase in my electric bill. I have turned it off for time to time but not in August in Texas! I’m cautiously optimistic about the longevity and durability of this unit so this review is subject to change which I will do if necessary. For now, I would highly recommend this system. ... show more
Reviewed in the United States on August 22, 2025 by gdx2
    • SUMMER TEMPS OVER 105°f? This is your unit.
Style: 18K Size: 18k
Review Image by Robert S.
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 DIY’s 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 can’t 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 wasn’t installed to code. And yes, running your disconnect could cost anywhere from $300-1200, but that’s life. Some have stated these units leak. My unit has not lost efficiency and I’ve monitored monthly kilowatt draw since last year and it’s 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 didn’t 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. It’s 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 haven’t charged mine since I need to move my main house split unit and I’ll 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 efficient I 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 MRCOOL’s 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 it’s only noticeable when it’s dead quiet in the house and I’m on that side. My guess have never been able to hear it. So I’m probably neurotic. lol ... show more
Reviewed in the United States on October 18, 2024 by Robert S.
    • DIY Very Possible - Though Electrical Knowledge a Must
Style: 18K Size: 18k
Review Image by Ross Cavanaugh
Review Image by Ross Cavanaugh
Bought this unit for a semi-finished garage (being used as a rec-room/home office) with the hopes of saving a few hundred bucks by doing it myself. I’m reasonably handy, but have no formal training in any specific field. Condenser is very heavy, so unless you’re reasonably strong, or just being smart, you’ll need someone to help move that around (or especially to help mount it if you’re going that route). Definitely a lot of specific steps to get this installed, but working at a reasonable pace, the whole project should only take a few hours. There are some great YouTube videos out there… overall I spent a few days prepping for the project… making sure I felt confident in each step. The pre-charged refrigerant lines are what make “DIY”. This unit does not simply plug into a typical outlet, however, so you will need to run specific electrical power for it, and buy those materials separately (for me, 15 ish feet of 12-2 romex, appropriate conduit, and a 20 amp breaker). If you have a breaker panel (or sub-panel) right where this is being installed, and have capacity to add a dedicated 20 amp breaker, great! I got lucky and the sub panel for my pool equipment was right where I needed it. Had a friend come by and give a quick electrical consult, make sure I wasn’t going to overload it, as I was fairly clueless and terrified this step. If you do not have easy access to this power supply, or do not feel comfy with moderate electrical work, you will need to hire an electrician to make sure this can go where you need it (and pay them something to hook up what you need). Otherwise this unit is GREAT, and can’t wait for it to heat up in LA so I can enjoy my nice cool garage! Also pictured (and purchased separately) is a mount for the exterior condenser, and a plastic channel to help protect/conceal/clean-up the exterior piping. I also needed to buy a couple “90mm hole-saws” to get the piping through my wall, and ultimately through stucco. Other major-ish tool needed was a hammer drill (for the stucco). Otherwise, all pretty common tools (drill, level, wrenches, etc). They also recommend a “torque wrench” when connecting the refrigerant lines… I just used 2 wrenches and tightened until I encountered resistance, then torqued it the tiniest bit beyond that, like the instructions say, and so far no gas leaks, and the unit is working well! ... show more
Reviewed in the United States on May 20, 2024 by Ross Cavanaugh
    • DO NOT BUY
Style: 18K Size: 18k
At first I was really happy with unit cause install was super easy. 3 months later it started leaking water down the wall. Call customer care and they were not helpful. Tried called an AC repair person and everyone near me wouldn't touch it. It suddenly stopped leaking, buy slowly the fan was working properly. I had to keep the unit on turbo just to get the air moving. Here I am at a year and I'm still waiting for warranty to provide me a new fan motor. Recently got an email that I'd need to pay the shipping for the motor. What a bunch of BS. Don't buy this unit it's trash. ... show more
Reviewed in the United States on July 5, 2024 by Terra
    • Not happy
Style: 18K Size: 18k
Not real happy with it. I only have 400 sq ft. Had to size up. For heat you need to set it to 74 to be at 70. Air runs non stop at times even though it is 5 degrees cooler than I have it set at. Other times it is warmer and not running. I called a few times. They just make excuses.
Reviewed in the United States on September 8, 2025 by Colby Dauch
    • Installation snd operation is straight forward
Style: 18K Size: 18k
Review Image by flybigrc
Review Image by flybigrc
Packaged well and came early. The installation was mot difficult and the instructions were very detailed and easy to follow. Expect to take about 4 to 5 hours to complete. The setting up the ap on the phone was easy and i like it more than the remote as you can set a range for heat and cool. So far after a week its working great in my workshop. I would recommend Mrcool! ... show more
Reviewed in the United States on October 23, 2024 by flybigrc
    • 3 weeks and stopped working.
Style: 18K Size: 18k
It's thrown a p4 code after running great for 3 weeks. Took four days to hear back from Mr. Cool. They gave me a list to try and I will try them and see if it works. I think they thought it's never run at all because the list mainly consist of checking the fittings and releasing the freon. I'm not hopeful. I'll keep updating the progress. 8/4/23 Mr cool tech called on a Saturday, which was perfect for me. We opened the Condensor box, checked a few electrical lines, looked at the big white sticker on the actual condenser to see if it changed colors, by over heating, it did not. He concluded there is an internal issue that can't be fixed. They are sending me a new outside condenser to replace the broken one, which UPS tried to deliver yesterday to a different house in a different town. Still had not arrived. 8/5/23 UPS did it... they actually delivered the warranty unit to a different address in a different town. Now it's lost they say...it's not lost, they delivered it to a different house and the person signed for it. Why don't they just go back and get it, they have the address because they told me it. Now who knows how long this mess will take. It's only 105 here in Texas. It's been a year and the 2nd unit is running great. Does exactly what it says it does. If it wasn't for the hassle above...I would give this a 5 star. ... show more
Reviewed in the United States on July 27, 2023 by The Connors
    • Perfect for my tiny home!!
Style: 18K Size: 18k
I’ve been using my Mr. Cool for almost 2 years now and I’ve not had a single problem or issue. I clean the screens monthly and they are very easy to clean. Heats my little 720 square feet home just fine! Keeps it very comfortable in the summer too!
Reviewed in the United States on January 5, 2026 by Robin S Burke

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