#1 Home Improvement Retailer

Internet # 314675754

Model # DIY-12-HP-115C25

Store SKU # 1005768149

DIY 12,000 BTU 1-Ton 1-Zone 22 SEER Ductless Mini-Split AC and Heat Pump with 12K & 25ft Line

Apply Now
$undefined.00 /mo† suggested payments with months† financingApply Now
  • High-efficiency ductless mini split system: 22 SEER
  • Easy DIY mini split installation with pre-charged R410A lines
  • Wall mount air handlers/lines: 12k/25 ft.
  • View More Details
0 in stock
Free & Easy Returns In Store or Online
Return this item within 90 days of purchase. Read Return Policy
Product Details

About This Product

Introducing the latest in home comfort technology, with the 4th Generation MRCOOL DIY 12K BTU, 22 SEER Ductless Heat Pump System. This powerful single-zone system has the capability of heating and cooling an area up to 500 sq. ft. It comes complete with a 12K condenser, 12K air handler, and a 25 ft. line set pre-charged with R-410A refrigerant. The line set also has quick connectors which require no special tools, equipment, or training to install. The MRCOOL DIY system also includes many features that make it stand out among its competitors. The first of which is its ability to achieve an outstanding 22 SEER efficiency rating allowing it to be Energy Star certified. This system has many operating modes to select from to suit the needs of the user, including heat, cool, dry (dehumidification), and SLEEP. It also has the Follow Me function that adjusts the temperature of the room based on the temperature being read by the hand-held remote control. The DIY features the convenience of being able to operate its modes and functions with your smartphone by using the Smart HVAC app. The MRCOOL mini split is the only system on the market to offer a limited lifetime compressor warranty.


Product Information

Internet # 314675754

Model # DIY-12-HP-115C25

Store SKU # 1005768149



Air handler depth (in.)


Air handler height (in.)


Air handler width (in.)


Condenser depth (in.)


Condenser height (in.)


Condenser width (in.)



Air direction/circulation


Air handler weight (lb.)


Amperage (A)

25 A

BTU Cooling Rating

12000 BTU

BTU Heat Rating

12000 BTU

Color Family




Condenser weight (lb.)


Coverage Area (sq. ft.)


Decibel (Sound) Rating

38 dBA

Decibel Rating

38 dBA

Filter Type



Remote Control

Line Set Length (Ft.)

25 ft

Mini Split Features

Auto cool, Automatic shutoff, Defrost, Fan only option, Mobile App, Overload protection, Sleep setting, Timer, Wifi

Minimum Outdoor Temperature (F)


Mount Location

Wall Mount

Number of cool settings


Number of Fan Speeds


Number of Tons

1 ton

Pack Size


Power Options


Remote Access

Remote Access

Requires Hub?

No Hub Required



Smart Home

Smart Home Enabled

Smart Home Protocol


Voice Control Hub Required

No Hub Required for Voice Control

Voltage (v)


Wattage (watts)

Not Measured

Works With

Alexa, Alexa, Google, Google Assistant

Zone Capacity

1 Zone

Warranty / Certifications

Certifications and Listings

AHRI Certified, CSA Certified, CSA Listed, Energy Star

Manufacturer Warranty

5-year Parts/7-year Compressor

Seasonal Energy Efficiency Ratio (SEER)


Questions & Answers

Q:Can I get or print a wall mounting template before I buy the unit, to make sure the inside unit will fit in the space, and on the studs?
by|Apr 11, 2024
1 Answer
Answer This Question

A:  Please contact us directly at support@mrcool.com or 270-366-0457 for further assistance with this.

by|Apr 13, 2024
    Q:Is this unit pre-charged from the factory with Freon?
    by|Apr 10, 2024
    1 Answer
    Answer This Question

    A:  Yes, the entire system is pre-charged with R410-A refrigerant.

    by|Apr 12, 2024
      Q:How many BTU’s will I need for a 11x19 foot garage with 9 ft ceilings in Virginia Beach, VA?
      by|Apr 10, 2024
      1 Answer
      Answer This Question

      A:  Unfortunately, we are unable to assist with sizing. It is best to use an HVAC Load calculator or get a manual j calculation when sizing a system.

      by|Apr 12, 2024
        Q:The specifications say the air handler is “hight 47.84” inches tall. Is that correct?
        by|Mar 23, 2024
        1 Answer
        Answer This Question

        A:  The DIY 36k air handler has a height of 14.25 in. I will post the brochure below that has a little more information. https://mrcool.com/wp-content/dox_repo/mc-diy-4-br-en-01.pdf

        by|Apr 9, 2024
          Showing 1-4 of 407

          Customer Reviews

          4.6 out of 5

          • 4.6 out of 578 reviews
          • 84% recommend this product
          Filter by:
          Showing 1-10 of 578 reviews
          Great unit and easy setup
          This is the second Mr. Cool DIY split unit we have purchased. It workes great in our 500sqft gym. Easy to set up just wished that the Line Set Cover Kit was included (had to purchase separately)
            • Recommended
            Worked great - for one year
            Installed one year ago. It worked great for one year, then it stopped working. Flashing a p4 code. I emailed Mr cool with the problem. They responded quite well with a few “try this” instructions, non of those suggestions worked. Two months later and 10+ emails, 10+ phone calls and no response. I called and HVAC contractor and he told me that he sees many problems with these units. He said if you can get tech support, it is usually a burned up control board or bad compressor. But he comformed that they have the worst customer service. He recommends pioneer for the less expensive units. They at least have good customer service.
            Response from MR COOL TeamJan 30, 2024
            We do apologize for the issues you have had. Please email me directly at csmanager@mrcool.com. mrcool
              3 found this review helpful
              Install it yourself!!
              These are easy to install. I installed it in the narrow confines of an interior RV wall with the outside unit mounted on my rear bumper. 3 years later still working. My air handler has gotten a bit whistly while running "sounds like a mini jet engine whistle when turning on or off" but still quieter than other types of HVACs. Also side note the insulation that comes with it for the charged lines does not hold up to outdoor weather. I love mine works great anywhere from 5°-116° personally tested.
                • Recommended
                I’m enjoying my Mr. Cool. It has surpassed my expectations.
                • Verified Purchase
                Won't power up
                i purchased the DIY 18K and installed it over 2 days. I followed the instructions and i thought all was going well. 2 30A breakers confirmed 120vac at the panel, wired up 30A Disconnect w/ 30A fuses confirmed 120vac on both load lines, load lines 1
                Response from MR COOL TeamAug 11, 2023
                We do apologize for the issues. Please contact me directly at csmanager@mrcool.com. mrcool
                  2 found this review helpful
                  We bought the 24k btu 4th gen. Unit. We normally don't set it below 79. It cools very well. We have a 2 br 1 bath home. My husband and son installed it pretty quickly. We recommend it.
                  Response from MR COOL TeamJul 31, 2023
                  Thank you for the review! Glad you guys are enjoying your equipment!! mrcool
                  • Verified Purchase
                  3 found this review helpful
                  Easy install
                  Installed this unit to cool my garage workshop. Took my time, followed instructions and the install was not bad at all. Now with temp 95 outside, my workshop is a cool 76 degrees.
                  Response from MR COOL TeamJun 14, 2023
                  We are glad you are enjoying your system and that your install went well! Thank you for the review! mrcool
                    • Recommended
                    2 found this review helpful
                    Perfect for my 450 sq ft AirB&B.
                    Easy Installation. So far have used on heat but it has done a great job heating my 450 sq ft AirB&B.
                    • Verified Purchase
                    • Recommended
                    Very energy efficient. Whisper quiet. I installed it in my...
                    Very energy efficient. Whisper quiet. I installed it in my garage/shop and the DIY lines were easy to work with. The android phone app will not connect, but the iOS app on my iPad did, which is really the easiest way to work with the system, much easier than the wall mounted thermostat or the wall mounted remote control. The unit does a good job of cooling 500 sf, 10' tall well insulated garage. If my garage was less insulated or if it was larger (third stall) I would consider the 18,000 BTU model. I would recommend it to a friend and purchase it again.
                    • Verified Purchase
                    1 found this review helpful
                    The best upgrade for my home
                    I purchased the Mr. Cool 12,000 BTU system after extensive research on home HVAC setups. I have a loft space that is open to my living room, and the central HVAC has difficulty keeping it at a consistent temperature compared to the rest of the home. It performs better than advertised, and was relatively easy to install. Follow the instructions, and watch the videos. Helpful tip: choose which method you want to use to control the unit, they do not work together.
                      • Recommended
                      Showing 1-10 of 578 reviews