Mr Cool Mini Split ACs – Are They Any Good? (2024 Review)

Christopher Burke

Written By

Christopher Burke

Expert Reviewed By

Dean Zoet

Last Updated On

“If you make a purchase using our provided links, we may receive a commission. Learn more here.

Quick Guide - MRCOOL

My Opinion

Mr Cool mini splits are known for their DIY installation options, making premium cooling available for an affordable price and saving homeowners hundreds of dollars up front.

4.4

Overall Score


Reliability

4.2

Current Progress
Current Progress
Current Progress
Current Progress

Performance

4.7

Current Progress
Current Progress
Current Progress
Current Progress

Energy Efficiency

4.6

Current Progress
Current Progress
Current Progress
Current Progress

Warranty

4.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.5

Current Progress
Current Progress
Current Progress
Current Progress
Pros
  • Mr Cool mini splits are compact and quiet.
  • Anyone can install a Mr Cool mini split with simple hand tools.
  • It is one of the most affordable ways to add air conditioning to a room.
  • The inverter compressor is extremely efficient and has high SEER ratings.
  • May qualify for tax credits and utility rebates.
CONS
  • Mr Cool has a bad reputation amongst HVAC professionals due to DIY installs.
  • Flared fittings are not as reliable as soldered connections.
  • Mr Cool is a relatively new company, and long-term parts availability may be problematic.
  • Some HVAC companies refuse to work on or install Mr Cool mini splits.

Mr Cool brand mini splits are all over the place and are only growing in popularity. When they first came out in 2014, I was a bit skeptical. However, after installing many of these units, it is easy to see why they are so popular.

Where I live in the south, everyone is looking for an affordable cooling option, especially in the hot summer months of July and August.

Still, not all models are created equal, so I've put together my review to help you decide whether a Mr Cool mini-split is a good choice for your home.

MRCOOL Mini Splits – Quick Guide!

Best Overall Model

Mr Cool Olympus


The Mr Cool Olympus lineup offers top-of-the-line features including Energy Star Certification across the series and top level SEER of up to 23. I especially recommend the Olympus line to folks in really cold areas, as their "Hyper Heat" models are some of the best for lower temperatures.

Good Value Model

Mr Cool DIY Series


The DIY series was created with the homeowner in mind, and comes with pre-charged lines that can be safely installed by step-by-step by using the handy Mr Cool SmartHVAC App.

Avoid This Model

Mr Cool Easy Pro Series


The Easy Pro Series is the latest of the Mr Cool offerings, and also the most budget friendly. However, these are the least efficient models Mr Cool offers, and you'd be much better off with a DIY Series model of the same size in the long run.

My Complete Mr Cool Mini Split Review

Mr Cool Outdoor Unit

Mr Cool brand air conditioners are some of my favorite units to install because they are so simple and deliver exceptional performance.

I can typically do a full install in about a half day.

Additionally, I've found that Mr Cool offers a wide variety of systems that can accommodate most customers' needs.

Equally important is that I’ve had very few problems with the units, even after years of operation.

The most important thing is that they are installed properly and serviced regularly.

The first Mr Cool unit I installed was for myself when I needed a quick and affordable cooling solution for my shop. I didn’t want to mess around with running ductwork for a split system and didn’t have a good spot to place a packaged unit outside.

Since customers had already asked me about their products, the Mr Cool mini split was the perfect solution, as it would offer me firsthand experience.

When it first powered on, I was amazed by how quiet it was. I clocked it in at about 57 dB, quieter than the portable AC I had previously used from Black & Decker.

In the years since my own installation, I have installed dozens of similar systems and encountered very few problems.

In my opinion, when people tell me they don't like Mr Cool mini splits, I find that it's often a poor installation job versus the actual product. 

For example, I've seen installers fail to vacuum the refrigerant or even improperly wire the indoor and outdoor units, all of which lead to less than ideal operation and inevitable problems down the road. 

Pros & Cons – Quick Guide!

After installing dozens of Mr Cool mini splits, I’ve encountered many pros and cons.

I really like how easy they are to install on a wall, and they are a breeze to put in with just one person.

However, I am concerned about the overall quality and how long the units will last.

THE GOOD
  • Mr Cool mini splits are compact and quiet.
  • Anyone can install a Mr Cool mini split with simple hand tools.
  • It is one of the most affordable ways to add air conditioning to a room.
  • The inverter compressor is extremely efficient and has high SEER ratings.
  • May qualify for tax credits and utility rebates.
THE BAD
  • Mr Cool has a bad reputation amongst HVAC professionals due to DIY installs.
  • Flared fittings are not as reliable as soldered connections.
  • Mr Cool is a relatively new company, and long-term parts availability may be problematic.
  • Some HVAC companies refuse to work on or install Mr Cool mini splits.

Pricing - How Much Do They Cost?

Like with other air conditioners, Mr Cool mini splits vary a lot in price.

The first one I purchased was just over a thousand dollars, but I’ve noticed these systems skyrocketing in price lately.

In the last few years, the cost of all HVAC systems has increased dramatically, and R410A is a major factor.

I highly advise looking for sales and comparing prices at different retailers. I've seen a 12K BTU system priced at $1,500 at one store and a 24K BTU system for only $200 more at another.

When comparing prices, pay close attention to the line set length since this is a major cost for the DIY Series.

The Advantage Series is usually a few hundred dollars cheaper but requires professional installation.

Multi-zone systems also jump up significantly in price, but I find they work best in larger spaces or when trying to cool multiple rooms.

Finally, consider the cost of installation and other supplies not included with the air conditioner.

The systems come with everything you need for installation except the wiring to the unit. Additionally, most HVAC companies I've encountered will only install a new system that was purchased through them, so that's something to consider.

I agree with this sentiment, as I can only ensure the quality of the items I've purchased.

BTU

4th Gen DIY Series

3rd Gen Advantage Series

12K

$1,750

$1,000

18K

$2,200

$1,250

23/24K

$2,500

$15,000

Model #

$2,900

$2,000

*Average prices for single-zone Mr Cool mini splits

Pricing By Series

Series Name

BTU

Area

SEER

Price

ADVANTAGE SERIES

18000

750 sq. ft.

19

DIY SERIES

12000

500 sq. ft.

17.5

*Note – if models are unavailable then similar models may be shown

Some Features I Like from The MRCOOL Range

I've noticed mini splits growing in popularity in my area over the last few years, and I've had the chance to install and use several different brands.

With my experience, I started noticing these factors that made Mr Cool stand out and why I continue installing them.

The Inverter Compressors Used Across Different Models

The first thing that stands out to me about Mr Cool's mini splits is their inverter compressors.

An inverter compressor allows the air conditioner to run at nearly limitless speeds.

My favorite thing about an inverter compressor is energy savings. These motors are extremely efficient, as evidenced by high SEER ratings. In fact, some Mr Cool mini splits are rated over 20 SEER.
Mr Cool Outdoor Unit

On a conventional split system, a 20 SEER unit would easily cost over $20,000 with top brands like Trane.

A 20 SEER heat pump costs a fraction of that, and a mini split is even more cost-friendly.

The low power consumption also means I can easily run it off a generator when the power goes out.

The other benefit of the Mr Cool inverter compressors is their quietness. I’ve wall-mounted several to the sides of buildings, and you can’t even hear them inside.

3rd Generation with Smart HVAC WiFi Control System

The included WiFi module is a notable addition since most mini-split manufacturers charge extra for a dongle.

I've also encountered more expensive systems that require a conventional thermostat, like most Daikin models.

The great thing about Mr Cool's systems is how easy it is to use with the internet.

Simply plug the USB dongle into the indoor unit and connect to it with the mobile app. Of course, the unit has a remote that allows you to change the unit’s settings.

Amazon Alexa, Google Assistant, Apple, and Android Phones Compatible

My Mr Cool mini split connects with my smart home devices for added convenience.

Google’s Nest and Amazon’s Alexa smart home systems work with Mr Cool air conditioners.

Having this connected allows me to say, “Turn on the garage air conditioner” from any room in the house without needing to pick up my phone.

I know many people who have also set this up with their other smart home devices so that their air conditioner turns on when they enter the room.

Alternatively, you can easily control the air conditioner with the Mr Cool app on Android and Apple devices.

Units Come Pre Charged With R410A Refrigerant

I always appreciate it when a product comes with everything needed for installation.

Fortunately, Mr Cool does include nearly everything needed for installation, including the refrigerant. That is more important than ever with the increasing price of almost all refrigerants.

All Mr Cool systems, including the DIY Series, come precharged with R410A. However, the Advantage Series and other models requiring professional installation only have enough refrigerant for a small line set.

If the installer uses one of the longer line sets, they must add more refrigerant (which will increase the installation price).

That's not a big deal, though, since that is how most central split systems are shipped, and the installer will be able to tell you this upfront.

More importantly, those opting for the DIY Series have nothing to worry about since the longer line sets are charged with the proper amount of refrigerant.

120 or 230 Volt Options For Different Uses

One challenge I often encounter is electrical limitations when adding a new air conditioner to an older house.

Homeowners often don't realize that their home has a limited amount of power. Additionally, running electrical to a new unit can also get very expensive.

It's pretty common for me to find a breaker panel with no spaces or limited spaces left, which could mean a lot of money for the homeowner to do a proper upgrade.

As an HVAC tech, that is a major problem since most split systems take up four spaces. The good news is that the Mr Cool mini splits can fit in as little as one space.

The smaller systems, like the 12K BTU, require a single dedicated circuit. However, even the larger ones, like the 36K BTU, only require a two-pole breaker.

Mr Cool's efficiency means I can often install these in homes that otherwise could not support a new central system.

The efficiency also means that smaller, cheaper wiring can be used. Also, these factors are not at the expense of performance.

Heating Included With Every Model

Living in the south, most people are only interested in cooling because they can easily warm their homes with space heaters during our short winters. However, I will always point out that Mr Cool's air conditioners are also a heat pump.

Heat pumps offer a very efficient method of warming. They work by changing the direction in which refrigerant flows via a reversing valve.

The downside is that they don't work in extremely cold conditions, but I have run mine below 30 degrees, and it still works pretty well.

I would not recommend a Mr Cool Advantage or DIY to someone up north. Instead, I recommend upgrading to the Mr Cool Olympus Series with Hyper Heat. 

These systems also have electric coil heat for those cold winter days.

Flared Linesets Available in Various Lengths

In my opinion, the one thing that really makes Mr Cool the best DIY air conditioner is the linesets. The DIY Series comes with precharged lines that do not require vacuuming.

However, even the other models, such as the Advantage Series, are nice since their included lines are pre-flared and ready for installation.

Connecting the lines is one of the biggest concerns for homeowners, as it should be. For other units, I have to get out my oxy-acetylene torches and braze the copper pipes.

With the Mr. Cool lines, I only need an adjustable wrench to tighten the connections.

I still recommend that if you're uncomfortable working with refrigerant, you have an HVAC technician do it.


How Does The Energy Efficiency Compare To Other Brands?

TL;DR: Mr. Cool mini-splits have some of the highest SEER ratings, making them more energy-efficient than many other brands, with ratings typically ranging from 18 to 22 SEER.

Mr Cool has some of the highest SEER ratings that I’ve encountered.

It is common to see Mr Cool mini splits at 20 SEER or higher, which is more efficient than a conventional split system.

All air conditioners sold in the US must have a SEER/EER rating. Here are a few things about energy efficiency to keep in mind when purchasing a new system.

What Is The Range of Mr Cool Mini Split Energy Efficiency Rating?

Mr Cool mini splits typically range from 18 SEER to 22 SEER.

The smaller units, like the 12K BTU model, often have the highest SEER ratings, while the larger units, like the 36K BTU, have much lower ratings.

Can You Get Any Tax Benefits From A High Energy Efficiency Model?

I’ve found several tax incentives and rebates for Mr Cool mini splits. The federal government has a program for energy-efficient heat pumps, which can be up to $2,000.

Additionally, local utility companies commonly offer rebates for energy-efficient heat pumps.[4]

I always warn buyers that these incentives are great, but they shouldn't consider it a guarantee. Rebate money can run out, and tax credits may not benefit everyone.

Speak to a CPA to learn more about available credits and how they may impact your tax liability.

How Does It Stack Up Against The Competition In Terms Of Energy Efficiency?

After comparing the Mr Cool mini splits to several popular brands like Mitsubishi and LG, I found that Mr Cool offered very comparable, or even slightly better SEER ratings.

AC companies regularly release new models that are even more efficient, so it's a good idea to do some research and comparisons before purchasing. 


Understanding Initial Investment vs Long Term Payoff

TL;DR: When choosing an air conditioner, balancing initial costs with long-term energy savings over a 7-10 year lifespan is crucial.

I’ve had some customers ask for the cheapest unit possible while others want to save on their electric bill.

The truth is that a lower electric bill doesn’t necessarily equal long-term savings.

I like to illustrate the savings with a SEER savings calculator, which can compare the operating costs of an existing unit to that of a new one.[5]

It is also important to remember that air conditioners have an anticipated life expectancy.

At some point, repairing the unit will not make sense, and it will need replacing instead.

I expect a mini split to last about seven years (depending on usage), but some last more than ten years, especially with annual maintenance.

Therefore, I compare the installation costs to energy savings over a seven to ten-year span.


Analyzing Mr Cool's Warranty Terms and Conditions

Mr Cool's warranty is a little more complicated, which I know leads to confusion, so I'll try to break it down.

It is important to remember that a unit properly installed by a licensed contractor and registered within the stipulated timeframe should get full warranty coverage.

DIY units are the only exception since they are designed to be installed by the homeowner.

The problem is that I often find units that were not installed correctly or weren’t registered.

In these situations, the warranty is often invalidated, and the cost of new parts may exceed the price of a whole new unit.

What’s the Warranty Coverage?

The warranty coverage on the Advantage models includes two years of parts, no labor, and one year on the compressor and remote control.[2]

All other Mr Cool mini splits come with a five-year parts warranty, a seven-year compressor warranty, and a one-year remote warranty.[3]

What Registration Requirements did I do to get the Full Warranty Coverage?

The installer or the homeowner must register the air conditioner to get full warranty coverage.

The model, serial number, and a receipt from the installer are needed to register the unit and should be kept in case you need to make a claim.

I do this for my customers to offer them some peace of mind.

What Conditions And Restrictions did I have to meet?

Mr Cool does not provide a timeframe for registering a new unit, but I always recommend filling it out as soon as possible.

I also like to remind people that they cannot transfer the warranty if they are considering moving in the near future.

Many people also forget that the warranty only covers replacement parts. Labor costs can add up quickly. It also does not cover refrigerant in the event of a leak.

How Does It Measure Up To The Competition?

It is difficult to make an apples-to-apples comparison of warranties. Still, coverage is pretty comparable to other units in this price range.

The one exception is the Advantage Series, which has a notoriously short warranty period.

While the warranty period is important, Mr Cool's customer service is very good compared to other manufacturers.

I have dealt with them many times, and they are responsive and can easily help troubleshoot minor and major problems.


Mr Cool Mini Split Models Compared

One of the biggest mistakes I've seen people make is purchasing the wrong model.

Years ago, there was the DIY and Advantage Series, which was easy enough to understand. Even then, DIYers often unknowingly purchased an Advantage unit.

Today, things are even more confusing since Mr Cool sells conventional split systems, but I'm not going to cover those in this guide.

Instead, I will go over each Series of Mr Cool mini splits.

Mr Cool DIY Series

Main Feature
  • Easy self-installation with precharged refrigerant lines.
Mr Cool DIY Series
The first is the Mr Cool DIY Series, designed for homeowners to install themselves.

As an HVAC tech, I typically only work on these if a customer has already purchased one or it requires repairs.

The most notable difference between the DIY Series and other Mr Cool models is that the included lines have special fittings on the ends.

These fittings allow the lines to be pre-vacuumed and precharged with refrigerant. The valves inside the lines are only open once the installer tightens them down.

MR Cool Advantage Series

Main Feature
  • Reliable performance with customizable line lengths for tailored installations.
MR Cool Advantage Series

The Advantage Series is nearly identical to the DIY Series, with the exception of the lineset.

The Advantage Series comes with flared copper lines that are NOT precharged.

As an installer, it’s not a problem for me to pull a vacuum, but it’s not possible for a DIY’er.

Additionally, using longer lines may require me to add extra refrigerant to compensate for the longer runs.

Another major difference with the Advantage Series is the shorter warranty period compared to other models.

Mr Cool Olympus

Main Feature
  • Whisper-quiet operation, top-tier efficiency up to 23 SEER, and optional Hyper Heat for powerful and reliable heating.
My favorite Mr Cool mini splits have to be the Olympus models. These things are whisper quiet, super efficient, and come packed with features.

Unfortunately, they are some of the most expensive mini splits sold by Mr Cool.

Mr Cool’s Olympus Series goes up to 23 SEER, and all sizes are Energy Star certified. Most importantly, the Olympus Series has optional Hyper Heat.

While the heat pump works well, I always go with a Hyper Heat unit in houses where the owner plans to rely solely on the mini split for heat.

Mr Cool Easy Pro

Main Feature
  • Budget-friendly pricing with reliable performance.

The latest addition to the Mr Cool lineup is the Easy Pro. While I haven’t gotten a chance to work on one of these yet, they are very similar to the DIY Series.

The primary difference is that the Easy Pro Series has a slightly lower SEER rating than Comparable DIY Series units.

The benefit is that the Easy Pro mini splits are cheaper than comparably sized DIY Series.

After carefully comparing short—and long-term costs with the DIY Series, I would consider an Easy Pro.

Mr Cool Multi-Zone Mini Splits

Main Feature
  • Versatile climate control for multiple rooms with one outdoor unit, supporting up to five zones.
Mr Cool Multi-Zone Mini Splits

Another subset of mini splits is multi-zone systems. Mr Cool has multi-zone mini splits in the DIY and Olympus Series.

A dual-zone system supports multiple indoor units with a single outdoor one.

I like the multi-zone systems for smaller homes and businesses since I can put a cassette (indoor unit) in each room.

The Olympus and DIY Series can support up to five zones in varying configurations.

My favorite is the five-zone Olympus, which supports ceiling cassettes and even a recessed duct product.

Are Mr Cool Mini Splits Really A DIY Option?

A question I am commonly asked is whether or not someone can install a Mr Cool brand ductless mini split system themself.

The truth is that some systems can be installed by the homeowner as long as they are mechanically inclined and don’t mind doing their own electrical work.

The Mr Cool DIY Series is specifically promoted for homeowners since the lines come precharged with refrigerant.

While the instructions are well-written, I recommend watching some installation videos to ensure you are comfortable with all the steps involved.

I definitely think prior HVAC experience is necessary, and it's not an "anyone can do it" situation.

Installing a system requires basic hand tools, such as screwdrivers, adjustable wrenches, pliers, and a drill.[1]

Most importantly, these systems require a hard-wired electrical connection, meaning a disconnect must be installed outside the home.

The line set must also pass through a large, round hole.

I do not recommend purchasing a Signature Series, Universal Series, Olympus Series, or Advantage Series unless you are an HVAC professional or plan on professional installation.

These systems require vacuuming the line set during installation and working with refrigerant should only be done by someone with an EPA 608 certification and proper training.


Homeowner & Buyer Reviews

Home Depot - 5/5 (Rating)
"IT WORKS GREAT. IT CUT MY BILL IN HALF AND IT'S BETTER LOOKING THAN HAVING A AC UNIT HANGING OUT OF A WINDOW SILL[6]"
Reddit
"I can’t say enough good things about it. I do have some HVAC experience and I hired an electrician who is licensed and insured. My electric bill has dramatically dropped from last month.[7]"
Supply House - 5/5 (Rating)
"I would buy this product again and again my customers I have installed it for love it[8]"
Lowes - 3/5 (Rating)
"Unit seems to be working ok. Install video is missing a lot.[9]"
Ingram’s Water & Air Equipment - 5/5 (Rating)
"We installed this in our 40’ RV and it works amazingly with our solar system.[10]"

*Mr Cool mini split reviews are from the 12K BTU DIY Series


FAQs

Does Mr Cool mini split heat and cool?

All Mr Cool mini splits offer heating and cooling. The heat pump technology used in the mini splits is cheap to operate, but it doesn’t work very well in regions where the temperature is often below freezing. To combat this, it is best to buy a Mr Cool heat pump with Hyper Heat.

How long do MR Cool mini splits generally last?

Several factors impact how long a Mr Cool mini split lasts, including maintenance, amount of use, and whether it was installed properly. On average, I expect mini splits to last seven years when serviced properly. However, that doesn’t mean the units won’t need minor repairs or a problem solved, like a fan motor.

How much electricity does a Mr Cool mini split use?

Mini-splits are some of the more energy-efficient ways to cool a home. Customers are often surprised when they receive the first electric bill with the new unit. The exact amount of electricity needed varies by SEER rating and BTUs. However, it is possible to estimate the cost with a SEER rating calculator.

Summary | Is a Mr Cool Mini Split AC Right For You?

 4.4 out of 5 stars (4.4 / 5)


Mr Cool offers an incredible range of mini splits, including DIY options, that can make heating and cooling your space a breeze. 

If you're still undecided, let me recommend the Mr Cool Olympus range, with its outstanding energy efficiency and SEER ratings of up to 23. 


References: 

  1. https://www.homedepot.com/c/ah/how-to-install-a-mini-split/9ba683603be9fa5395fab90c887a9dd
  2. https://mrcool.com/advantage-warranty/
  3. https://mrcool.com/warranty/
  4. https://mrcool.com/rebate-center/
  5. https://www.seerenergysavings.com/
  6. https://www.homedepot.com/p/MRCOOL-DIY-12-000-BTU-1-Ton-Mini-Split-Heat-Pump-Condenser-with-25-ft-Pre-Charged-Line-Set-110-115V-60Hz-DIY-12-HP-C-115C25/314673807?source=shoppingads&locale=en-US&srsltid=AfmBOooCceRlEAwul2VRCM6SomiCTuIivOkC6jY9H3dAyGqD3DjsKi-NUug
  7. https://www.reddit.com/r/hvacadvice/comments/sh1k22/mr_cool_diy_complete_crap_or_worthwhile/
  8. https://www.supplyhouse.com/Mr-Cool-DIY-12-HP-C-115C25-DIY-4th-Gen-12000-BTU-22-SEER-Energy-Star-Ductless-Outdoor-Unit-w-25-ft-Line-Set-115V
  9. https://www.lowes.com/pd/MRCOOL-DIY-4th-gen-ENERGY-STAR-Single-Zone-12000-BTU-22-SEER-Ductless-Mini-Split-Air-Conditioner-and-Heater/5014450471
  10. https://iwae.com/shop/12k-btu-22-seer-mrcool-diy-ductless-heat-pump-split-system-4th-generation-wall-mounted-ha22094.html
Was This Article Helpful?
YesNo

Christopher Burke

Writer and HVAC Hobbyist

Christopher Burke
Christopher's expertise extends to HVAC systems, stemming from his hobby of electronics repair and further education in HVAC and automotive technology. He is an avid DIY enthusiast with a CO2 laser, 3D printers, and a CNC router. Christopher also loves collecting and playing video games

My Favorite Home Appliance?

Midea Duo Portable AC

See Our Editorial Processes

Meet Our Team

Share Feedback