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MRCOOL DIY-18-HP-230B Review (Split-System Air Conditioner 2021)

Mrcool Diy 12k Review SEER Ductless Heat Pump Split System 3rd Generation - Energy Star 230v (DIY-18-HP-230B)

When looking for a unit that can both cool and heat your interior space, the MrCool DIY-12-HP-115B air conditioner is one of the units you should take a look at.

We are talking about a ductless mini-split heat pump with several smart features you are certain to enjoy having in the house.

Mini-split heat pumps are much more affordable than traditional HVAC systems in the market.

A notable feature of MrCool DIY-12-HP-115B is the ‘Do-It-Yourself’ factor, which means the kits can be procured and installed conveniently without any need for professional assistance or special tools.

All the components included in the product package are designed to enable an ‘easy install’ process for the buyers.  (Check it out on Amazon here).

Features of MRCOOL DIY-12-HP-115B

Air conditioners are known to come with a wide variety of technical features; the top-rated features of MrCool DIY-12-HP-115B are specially designed with the buyers as the primary focus.

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The highlight of the air conditioner is the smart technology incorporated in the design.

We’ve curated some of the features you can find on MrCool DIY-12-HP-115B.

Leakage Detection System

An alarm has been built into the air conditioner to alert the users of any damage to the compressor.

The compressor is integral to the functionality of the entire system; hence, MrCool would like to make things easier for you by immediately detecting any holes or punctures while producing high-air comfort.

Very Low Ambient Cooling

The MrCool DIY-12-HP-115B is an excellent cooling system for greenhouses, server rooms, and any other place in need of low cooling temperatures.

The air conditioner can produce as low as 5⁰F; you wouldn’t have to worry about overheating of components or items if you have a unit of MrCool DIY-12-HP-115B installed in that space.  

Certified Efficiency

For every product to prove its worth, it needs to be reliable in terms of performance and efficiency.

Different product niches have distinct certification standards; for air conditioning models, there are certain energy efficiency guidelines that products must adhere to for a chance at earning an Energy Star.

Energy Star certified models can save you some money by reducing your monthly energy consumptions.

Good for you, MrCool DIY-12-HP-115B is energy star certified, 22 SEER 10HSPF, with minimal power consumption.

Seamless Installation

Thinking of air conditioners, you probably think you might need expert assistance to set everything in place for you.

With MrCool DIY-12-HP-115B, you are provided with a 25-feet pre-charged line set for easy installation of the ductless system.

Every component of the air conditioner is designed to fit and detach with other parts conveniently.

However, if you are not confident in your ability to do so, it would be better to get professional for the installation process.

Sleep Mode

This is another unique function the MrCool DIY-12-HP-115B has to offer its users; when this mode is active, the unit performs automated adjustments of the working temperature for you to sleep better and deeper.

You can set the sleep mode to either Cool or Heat mode, thereby activating gradual increments or decrements in the temperature of the room.

The mode shuts off by itself after working for 7 hours.

Smartphone Linking

Your mobile smart device can be connected to the MrCool DIY-12-HP-115B using the Smartphone app.

MRCOOL DIY 18k BTU 20 SEER Ductless Heat Pump Split System 3rd Generation test review.jpg

The app was created to help users with controlling their air conditioning unit from anywhere or point in the house.

As long as your phone is connected to the internet, you can access a range of controls on the app designed just for the MrCool DIY-12-HP-115B.

Follow-Me Performance Function

When active, the MrCool DIY-12-HP-115B is programmed to track the remote and adjust the temperature around the remote.

Hence, if you keep the remote close by, then the air conditioner will be either heating or cooling the air around you.

This makes the whole experience a lot more enhanced and comfortable for you.

Another side-effect of this temperature is that the room gets properly circulated with either hot or cool air.

Some air conditioners are built to stop any cooling or heating of the room’s temperature as soon as the set temperature is reached.

Integrated Digital Assistants

The split air conditioner is programmed to work with Google Assistant or Alexa, both of which you can use to control or set any working temperature you prefer.

The new MrCool Smart HVAC Controller Module and App is designed for seamless integration of your unit with either of the assistants.

Pros and Cons of MRCOOL DIY-12-HP-115B


  • Designed for a tool-free DIY installation
  • Can be used with digital assistants and mobile devices
  • The air conditioner can easily heat or cool a 500 sq-ft space
  • Its compressor technology helps you cut back on power costs
  • Has an Energy Star Certification
  • Comes with a remote and Wi-Fi smart kit
  • Provides a personalized experience
  • Has a leakage detection system
  • Makes use of a standard 115V power input
  • The control lines are clearly labeled by the manufacturer
  • The line-set of the air conditioner comes pre-sealed


  • More expensive than most mini-split air conditioners
  • A 3.5-inch hole needs to be drilled into the wall


Installing this impressive mini-split system is a breeze; all you need is a 3.5-inch hole in the wall for the line-set and control lines to pass through.

After this, you can run a 120V power source to the unit using a breaker.

Any individual can handle the process in a few steps without the need to use any expensive equipment.

The product is shipped in two boxes, which contains all the necessary components you require for a successful installation.

You won’t be needed to get any HVAC gauges or vacuum pumps that you might even be unfamiliar with.

The MrCool DIY-12-HP-115B has the heating and cooling capacity of 12,000 BTUs. This is more than enough to either heat or cool a 500 square-feet room.

There is a 7-year compressor warranty that comes with MrCool DIY-12-HP-115B, it also has a 5-year parts warranty.

This is a guaranty from the manufacturer about the integrity and quality of the product.

In other words, you are certain to realize high value from making this investment in your home. You can check it out on Amazon here.