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MRCOOL COMFORT MADE SIMPLE

MRCOOL 36,000 BTU Ductless Mini Split Air Conditioner w/Heating & Cooling, DIY Star 4 - Indoor Air Conditioning Unit for Home, Office, and Commercial Space

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Availability: 20 left in stock
Fulfilled by JOI Industries
Arrives May 13 – May 18
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Style: 36K


Size: 4th gen


Features

  • Air Conditioner: 4th Generation DIY mini split air conditioner equipped with a low refrigerant alarm to prevent costly repairs and air filter cleaning and replacement alerts to ensure optimal air quality and efficiency
  • Easy DIY Installation: No special tools, equipment, or training are required thanks to pre-charged Quick Connect line sets, making installation a breeze and completing in just a few hours
  • Low Ambient Cooling: Capable of operating in cooling mode from as low as 5 degrees Fahrenheit, making it ideal for spaces up to 1,500 square feet
  • Auto Restart Feature: In case of power outages, the unit automatically restarts at previous settings, ensuring continuous comfort without manual intervention
  • Comprehensive System Includes: Comes with an outdoor heat pump condenser, indoor wall-mounted air handler, upgraded DIYPro cable, remote control, Smart HVAC controller module WiFi smart kit, and installation kit for a complete solution

Brand: MRCOOL COMFORT MADE SIMPLE


Capacity: 3 Tons


Cooling Power: 36000 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 30"W x 40"H


Seasonal Energy Efficiency Ratio (SEER): 18


Color: White


Voltage: 230


Noise Level: 34 Decibels


Refrigerant: R-410A


Cooling Power: 36000 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: 34 Decibels


Refrigerant: R-410A


Filter Type: Nylon


Inverter Type: Has Inverter


Installation Type: Split System


Compressor Type: Rotary


Is Outdoor Unit Required: Yes


Air Conditioner Application: Residential


Core Material: Aluminium Alloy


Voltage: 230


Power Source: Corded Electric


Wattage: 35


Is Product Cordless: No


Seasonal Energy Efficiency Ratio (SEER): 18


Efficiency: 18.0 (SEER)


Annual Energy Consumption: 18.3 Kilowatt Hours


Air Flow Efficiency: 750.6 Cubic Feet Per Minute Per Watt


Warranty Type: Limited


BEE Star Rating: 1 Star


Brand Name: MRCOOL COMFORT MADE SIMPLE


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


Model Number: 4th gen


Included Components: Ductless Mini-Split


UPC: 810035935181


Manufacturer: MRCOOL


Item Type Name: Ductless Mini-Split


Warranty Description: Manufacturer


Item Dimensions D x W x H: 16"D x 30"W x 40"H


Window Opening Maximum Width: 30 Inches


Window Opening Minimum Height: 40 Inches


Window Opening Minimum Width: 31 Inches


Window Opening Maximum Height: 40 Inches


Control Method: Remote


Controller Type: Remote Control


Capacity: 3 Tons


Floor Area: 15000 Square Feet


Form Factor: Mini-Split


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 13 – May 18

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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Top Amazon Reviews

    • Mr cool mini split thumbs up !
Style: 24K Size: 4th gen
Install this 24k mini split from Mr cool was really amazed at the self installed install, very straight forward, hook everything, up powered on as per instruction, and boom prefect unit, cool work beautifuly, quiet, blows like a wind storm if you select that , heat installed in a 1000sq foot house heated this house with ease and the bill is unbelievable it went from $78 a month to $96. Could not nlbe happier with the proformance of this unit even outside unit quiet , thank you looking at purchasing the large ducted unit for a bigger 2000sq foot home that has a 1982 carrier unit still works but if I can purchase this as an upgrade for 2500ish and save some energy noise monies I'm in cheers to Mr cool, very nice design and price. ... show more
Reviewed in the United States on January 8, 2026 by Jason
    • SUMMER TEMPS OVER 105°f? This is your unit.
Style: 18K Size: 4th gen
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.
    • Easiest of all the DIY units
Style: 18K Size: 4th gen
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
    • Truly DIY
Style: 24K Size: 4th gen
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. ... show more
Reviewed in the United States on March 15, 2024 by Brian

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