Introducing MRCOOL 4th Generation DIY Mini Splits

by Pete Lader June 09, 2022

You might have heard that MRCOOL has released the 4th Generation Series of their famous DIY Mini Splits just before summertime!

As one of MRCOOL's closest partners, we wanted to take some time to highlight in this article:

  1. Benefits of the new 4th Generation
  2. Breakdown of 4th Generation Combinations
  3. Our Recommendations!

Shop the 4th Gen Series Now!

What's new with 4th Gen?

More Zones. The 4th Gen Line introducing two new Outdoor Units / Condensers, one with 18K BTUs and one with 48K BTUs. One of the most commonly asked questions is if MRCOOL is compatible with 5 Zones and finally theses systems are! With the new 48K Condenser, you can cool down and heat up to 5 rooms so you can find the perfect temperature year-round in your home!

With the new 18K 2-Zone Condenser, it makes buying the two 9K Mini Split much more affordable than previous generations... no wasted BTU output! 

Best In Class Warranty. Lifetime Warranty? Yes Please! MRCOOL 4th Generation Condensers now offers*:

  • A limited lifetime warranty
  • 7 Year replacement warranty

The Standard Warranty comes with a 5 Year Limited Warranty.

*Read more in the MRCOOL Warranty PolicyThe unit must be registered within 60 days of the installation date and the original, registered owner must also enroll in the MrCool Care program within 4 months from the installation date, which has an biannual fee to be covered by the owner

New Communication Cables! The new DIY Pro™ Cable, which is included in each Mini Split, provides the highest protection and durability against weather, gardening and wildlife factors!

The DIY Pro™ Cable eliminates the need for electrical conduit, leading to higher mechanical protection and durability. 

The Thick & Protective Conduit protects from:

  • Unpleasant and Extreme Weather
  • Animals that may chew, bite or otherwise touch the cables!
  • Day to Day Yard Work

This will ensure your DIY Mini Split System will last a long, long time and have zero disruptions to perfect air!


The 4th Generation also continues to be the most innovating Mini Split System with even more incredible benefits:

Easiest DIY Installation. The MRCOOL Linesets, available in 16', 25', 35' and 50', each MRCOOL pre-charged lineset allow you to install this ductless system without special equipment, time or training.

Most Affordable DIY System. MRCOOL has spent all the hard work, energy and money creating their DIY Mini Splits so YOU don't have to spend your hard-earned money on an expensive, outdated systems that require a licensed HVAC technician to install. This saves hundreds or even thousands of dollars of your money!

Low Ambient Cooling. This feature makes the MRCOOL DIY® the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.

4th Gen Combinations

Let's review the options MRCOOL offers that can heat or cool almost any American household!

Choose your Outdoor Unit / Condenser

  • 18K - up to 2 Zones
  • 27K - up to 3 Zones
  • 36K - up to 4 Zones
  • 48K - up to 5 Zones

Choose your Indoor Unit(s) / Air Handler(s)

  • 9K - covers 375 square feet
  • 12K - covers 500 square feet
  • 18K - covers 1,000 square feet
  • 24K - covers 1,500 square feet

Choose your Linesets

  • 16 Feet
  • 25 Feet
  • 35 Feet
  • 50 Feet

If you need extra length, simply add a coupler and the desired additional lineset(s). 

For all combinations, please check the Summary Below:

4th Generation Summary

Our Recommendations

2 Zones/Rooms

3 Zones/Rooms

4 Zones/Rooms

5 Zones/Rooms

Have More Questions? Leave a Comment or find us here:

Call Us: 800-805-7102
Email Us: [email protected]


  • Can I order directly from u?

    Ken on

  • I have a LG mini split now that just broke down! Reading about MRCOOL and love the ability to connect through the app and cool 5 zones. I have a decent sized home and I think we are going with the new 4th Gen…summer is around the corner and I don’t want feel like spending $8K on installation haha

    Rory G on

Leave a comment

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