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MRCOOL COMFORT MADE SIMPLE

MRCOOL 12000 BTU 115V Ductless Inverter Mini Split Air Conditioner & Heat Pump System, 5th Gen DIY - Wall-Mounted AC Unit w/ Heating and Cooling for Home, Office & Commercial Space

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Availability: Only 5 left in stock, order soon!
Fulfilled by Spreetail
Arrives Wednesday, Feb 25
Order within 11 hours and 44 minutes
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Style: 12K


Size: 5th gen


Features

  • Air Conditioner: 5th Generation DIY mini split air conditioner equipped with both cooling and heating capabilities with 12,000 BTUs and coverage up to 550 square feet; Perfect for home, office, or commercial use
  • Easy DIY Installation: No special tools, equipment, or training are required, thanks to pre-charged 25-foot Quick Connect line sets, making installation a breeze and completing in just a few hours
  • Low Noise, Efficient Performance: Combo unit operates quietly and efficiently to keep you comfortable without high energy costs
  • Cooling & Heating Convenience: With both heating and cooling capabilities, this combo unit is great as an HVAC for all-year-round use; Sleek design and neutral color allow this modern indoor unit to blend into any interior space

Description

Upgrade your home comfort with the 5th generation MRCOOL DIY 12K BTU, 23.5 SEER ductless Heat Pump system. Perfect for spaces up to 550 sq. ft., this high-performance system provides year-round heating and cooling with exceptional energy efficiency. With an impressive 23.5 SEER rating, it’s Energy Star certified, helping you save on energy costs while maintaining a comfortable home environment. The MRCOOL DIY system comes complete with a 12K condenser, 12K air handler, and a 25 ft. pre-charged line set with R-454A refrigerant, making installation a breeze. The easy-to-use quick-connect line set requires no special tools or professional help—simply follow the included instructions for a hassle-free setup. Enjoy ultimate comfort with versatile modes including heat, cool, dry (dehumidification), and sleep. The "Follow Me" feature uses the remote control's temperature sensor to automatically adjust the system’s settings for optimal comfort. Plus, control your system from anywhere with the Smart HVAC app for added convenience. Get reliable, energy- efficient climate control with the MRCOOL DIY 5th Gen system—perfect for those who want both comfort and savings.

Brand: MRCOOL COMFORT MADE SIMPLE


Capacity: 1 Tons


Cooling Power: 12000 British Thermal Units


Special Feature: Dehumidifier, Remote Controlled, Sleep Mode, WiFi Enabled


Product Dimensions: 10"D x 40"W x 14"H


Seasonal Energy Efficiency Ratio (SEER): 23.5


Color: White


Voltage: 115 Volts


Noise Level: 45 Decibels


Power Source: Corded Electric


Manufacturer: ‎MRCOOL


Part Number: ‎DIY-12-HP-WM-115D25O


Item Weight: ‎145 pounds


Product Dimensions: ‎10 x 40 x 14 inches


Item model number: ‎DIY-12-HP-WM-115D25O


Size: ‎5th gen


Color: ‎White


Style: ‎12K


Material: ‎Metal


Power Source: ‎Corded Electric


Voltage: ‎115 Volts


Wattage: ‎2300 watts


Installation Method: ‎Split System


Item Package Quantity: ‎1


Sound Level: ‎45 Decibels


Special Features: ‎Dehumidifier, Remote Controlled, Sleep Mode, WiFi Enabled


Included Components: ‎25ft Install Kit 115V


Batteries Required?: ‎No


Warranty Description: ‎5-year Parts and 7 year Compessor


Capacity: ‎1 Tons


Floor Area: ‎550 Square Feet


Date First Available: February 26, 2025


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Feb 25

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

    • An effective and efficient DIY! Runs great!
Style: 36K Size: 5th gen
Review Image by Zack Groom Zack Groom
Review Image by Zack Groom Zack Groom
A great solution! I was able to DIY this project 100% (did have some help lifting the gear to mount to the walls). The install was involved in but manageable. Lines and power installed with ease. Outstanding heating and cooling capabilities. This was the best purchase I've made all year, a big quality of life upgrade that is already bringing down my electric bill. 10/10 would recommend and buy again. ... show more
Reviewed in the United States on October 24, 2025 by Zack Groom Zack Groom
    • I install it without any help, but a second set of hands wouldn't hurt.
Style: 36K Size: 4th gen
If you have a hole saw and a crescent wrench. You can install this unit. Quiet and efficient. everything worked as advertised.
Reviewed in the United States on November 12, 2025 by Amazon Customer
    • 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
    • SUMMER TEMPS OVER 105°f? This is your unit.
Style: 18K Size: 4th gen
Review Image by Robert S. 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. Robert S.
    • I love these
Style: 12K Size: 5th gen
I have installed two of these so far. They work great, they are easy to install, and I love the mobile controls.
Reviewed in the United States on November 13, 2025 by Steven C Meyer
    • Mr. Cool NOT!!!!!
Style: 36K Size: 4th gen
I purchased this unit which is 36,000BTUs rated for 1500 sq ft for my 1200 sq ft shop. It was pretty easy to install though NOBODY would use a 1/2" conduit connection from the power supply to the condenser, so it should be a 3/4" connection. Other than the crap instructions and pictures, took about 2 days or 10 hours. I am VERY capable of doing this work and will say my 1st attempt at an AC unit of any kind. Bottom line it turned right on, blows cold air despite the poor fan speed and simply is incapable of keeping my shop below 87 degrees, even on some days when it is just above 80 degrees. I did 4 tests all starting around 97, 92, 87, 95 inside and 101, 96, 94, and 83 inside. I NEVER got a reading below 87 degrees in my shop even after running for over 24 hours straight through the night when the temperature outside fell into the low 70s each night. I think I would need 4 of these units to get the workable comfort level that I was expecting. It is too bad, I cannot return it a so I am out 2 days work and $3000. Don't make the same mistake!!!! ... show more
Reviewed in the United States on July 12, 2023 by Bryan

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