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DIY 18,000 BTU 1.5-Ton 1-Zone 22 SEER Ductless Mini-Split AC and Heat Pump with 18K & 25ft Line

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  • High-efficiency ductless mini split system: 22 SEER
  • Easy DIY mini split installation with pre-charged R410A lines
  • Wall mount air handlers/lines: 18k/25 ft.
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Product Details

About This Product

The MRCOOL 4th Generation DIY 18K BTU, 22 SEER Ductless Heat Pump system offers a complete solution to your home's heating and cooling needs. This system can heat and cool an area up to 750 sq. ft. and is capable of an Energy Star certified, 22 SEER efficiency rating. However, the best feature of this system is the ease of installation it provides to the homeowner. With the included pre-charged 25 ft. line set, some hand tools, and a few hours of time this entire system can be completely installed. This system comes equipped with many functions that separate it from the rest. It has multiple operating modes, which include Auto, Heat, Cool, Fan-Only, Dry (dehumidification) and Sleep. It also features the Follow Me function, which allows the system to continually adjust the room temperature based on where the hand-held remote controller is. Need to operate the system when you're not at home. No problem. The MRCOOL system also has the capability of being operated with your smartphone with the use of the Smart HVAC app. MRCOOL stands behind the quality and workmanship of this system by being the only manufacturer to offer a limited lifetime compressor warranty.


Product Information

Internet # 314675755

Model # DIY-18-HP-230C25



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)

30 A

BTU Cooling Rating

18000 BTU

BTU Heat Rating

18000 BTU

Color Family




Condenser weight (lb.)


Coverage Area (sq. ft.)


Decibel (Sound) Rating

45 dBA

Decibel Rating

45 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

1.5 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 431

          Customer Reviews

          4.4 out of 5

          • 4.4 out of 594 reviews
          • 77% recommend this product
          Filter by:
          Showing 1-10 of 594 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
                    Best money I have spent yet!
                    I have had this unit for a year now. I have waited to post a review until I saw what this unit could do. My shop is a standard 21x21 2 car garage converted into a workshop. I cannot express how happy I am with this unit. There were some 98 degree days and this thing kept the workshop nice and cold and in the winter we had some low teen temps and the shop stayed nice and cozy! Simply follow the directions and everything goes perfect.
                    Response from MR COOL TeamMay 10, 2023
                    We are glad your equipment kept up with your desired temperatures through the heat and the cold. Thank you for your review. mrcool
                      • Recommended
                      1 found this review helpful
                      AC Mini split
                      Great product. Easy install and app makes operations easy not being home
                      Response from MR COOL TeamApr 5, 2023
                      We are glad you are enjoying your equipment! mrcool
                      • Verified Purchase
                      • Recommended
                      Easy peasy DIY.
                      Very easy, installed indoor unit and worked back. That told exactly where to put outdoor unit. Took me about a solid day being an older home, including electrical.
                      • Verified Purchase
                      • Recommended
                      Showing 1-10 of 594 reviews

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