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Last updated on Sep 10, 2020

Mitsubishi Air Conditioner Review

Mitsubishi uses innovative technology to produce energy-efficient and low-noise mini-split air conditioning models ​


  • All models are above national minimum SEER ratings
  • They sell five ENERGY STAR rated units.
  • Fantastic warranty and warranty-extension options

How We Reviewed Mitsubishi Air Conditioner

13 models compared

7 features evaluated

3 ratings analyzed

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Mitsubishi is a Japanese company, but its air condition products are actually manufactured in a joint partnership with Ingersoll-Rand plc, an Irish company. The two companies have been working together since 2018, though Mitsubishi has been making air conditioners for over 60 years.

Mitsubishi sells 13 single-zone mini-split air conditioning units, five of which are ENERGY STAR rated. Its units include INVERTER-driven compressor technology (proprietary technology to Mitsubishi), which requires minimum energy to maintain comfort. The company also promises that its mini-splits will be “whisper quiet,” by comparing its operating decibels to that of a restaurant conversation.

A measure of energy efficiency, a SEER rating tells you how much electricity it takes to remove heat from a room. A higher number means that it takes less energy, and from this, you can estimate your potential cost for running the unit. Mitsubishi’s units have SEER ratings of 16 to 24.6, which is a fairly standard industry range.

Units can remove between 9,000 to 36,000 BTUs, or units of heat, from a space, giving consumers a wide range of options. If you’re trying to cool an open concept living room, dining room, and kitchen, you could purchase one of Mitsubishi’s models with a higher BTU rather than two smaller units.

One of Mitsubishi’s standout features is its warranty. At first glance, it appears similar to competitors, covering parts for five years and the compressor for seven. But Mitsubishi offers several simple ways that allow you to extend this warranty up to 12 years, which includes registering your product online or using one of its approved installers.

Pros: Cons:
  • All models are above national minimum SEER ratings
  • They sell five ENERGY STAR rated units.
  • Fantastic warranty and warranty-extension options

  • Lower-end models are more expensive than many competitors
  • Mitsubishi Ductless Air Conditioner Overview

    • Efficiency (SEER rating): 16.0 – 24.6
    • Price level: $1,186 – $4,280
    • Model options: 13
    • Warranty: 5-year parts warranty, 7-year compressor warranty for M-Series models only
    • BTUs: 9,000 – 36,000
    SEER Rating
    Model Cost
    Cooling Area
    9,000 BTUs
    Up to 500 sq. ft.
    12,000 BTUs
    Up to 550 sq. ft.
    14,000 BTUs
    Up to 700 sq. ft.
    18,000 BTUs
    Up to 1,000 sq. ft.
    34,600 BTUs
    Up to 2,500 sq. ft.
    30,700 BTUs
    Up to 2,000 sq. ft.
    12,000 BTUs
    Up to 550 sq. ft.
    18,000 BTUs
    Up to 1,000 sq. ft.
    24,000 BTUs
    Up to 1,500 sq. ft.
    30,000 BTUs
    Up to 2,000 sq. ft.
    36,000 BTUs
    2,500+ sq. ft.
    36,000 BTUs
    2,500+ sq. ft.
    22,500 BTUs
    Up to 1,400 sq. ft.

    Energy efficiency – SEER rating

    Mitsubishi’s mini-split air conditioners provide buyers with a range of SEER ratings to choose from, as low as 16 up to 24.6. This means that all of its models exceed the national minimum rating of 13. Additionally, five of its models are ENERGY STAR rated.

    A SEER rating tells you how efficient a unit is at removing heat from an area. To calculate it, you take the amount of heat removed – measured in BTUs – and divide by the energy used to remove that heat – measured by watt-hours. A high SEER rating translates into a lower cost to operate.

    This is important to consumers because it will help estimate how much adding an air conditioning unit to your home could impact your utility bills. But you will also have to consider how large of a space you’re trying to cool. Units with higher ratings typically cool smaller areas and remove lower BTUs, so if you’re trying to air condition several rooms, you may have to trade-off between efficiency and heat removed.

    Warranty options

    A warranty protects you should your unit break down within the covered period. After investing in an air conditioner, you want it to last. Mitsubishi offers warranties on its M-series models, which cost more than other units. The warranty lasts for five years on parts and seven years on the compressor. It protects against defects during manufacturing and materials used. If a covered part broke during those five years, Mitsubishi would replace it.

    The compressor warranty lasts for seven years, which is two years longer than most of Mitsubishi’s competitors. Again, the company will replace a defective compressor, but the replacement part is only covered for the same period as the original.

    If you register your product with Mitsubishi within 90-days of installation, it will extend both warranties to ten years. Even more impressive, if you choose one of Mitsubishi’s Diamond contractors to install your unit and register it within 90 days, the company will tack on another two years for a total of 12-years coverage.

    Installation and maintenance

    A number of online retailers, independent distributors, and retailers such as Home Depot sell and install Mitsubishi’s mini-split air conditioners. As one of the largest manufacturers in the market, it’s not hard to find, though, like most manufacturers, the company doesn’t sell directly to consumers.

    Mitsubishi has a network of Diamond contractors available for installation. These contractors have completed a two-day service course, agreed to abide by a code of conduct, and been nominated by a distributor. To qualify, a contractor must also have a physical office or storefront and sell a minimum of 20 systems annually.

    If you choose a Diamond contractor for your installation, it gives you greater peace of mind that your unit will be installed correctly and extends your warranty. Otherwise, Home Depot and other companies offer installation services.

    While you can perform simple maintenance, such as cleaning the air filters yourself, for more complicated tasks, you should call a professional. Professionals can clean the evaporator coil and fins and coils inside the condenser, which should be done annually.

    Compare to Other Air Conditioner Brands

    SEER rating
    16.0 – 24.6
    16.5 – 27.5
    13.0 – 19.0
    9,000 – 36,000
    8,500 – 48,000
    Price level (with installation)
    $1,686 – $4,780
    $1,300 – $5,970
  • 5-year parts warranty
  • 7-year compressor warranty for M-Series models
  • 5-years parts and labor
  • 5- years limited warranty on the compressor
  • 1, 3, 5, or 10-year warranty, which covers the compressor, coil, and heat exchanger.
  • 10-year parts warranty
  • *All information accurate as of Jan, 14, 2020. Pricing information from ecomfort.com and ACwholesalers.comM. Cooling area calculated using EnergyStar.gov.

    Mitsubishi Ductless vs. LG Air Conditioners

    LG offers a wider selection than Mitsubishi. The company sells 33 models, which go up to a higher SEER rating. Some of its units have BTUs up to 48,000, making them a better choice than Mitsubishi if you have a hotter climate or a larger room to cool. However, the company’s top-of-the-line model plus installation costs are over a thousand dollars more than Mitsubishi’s.

    LG’s parts warranty only lasts for five years for both parts and labor, whereas Mitsubishi’s warranty excludes labor. The limited warranty on the compressor also lasts for five years, and neither warranty has the options to extend that Mitsubishi offers its customers.

    Both LG and Mitsubishi are global brands that sell its products worldwide. Because of this, it won’t be difficult to find a local company that sells and distributes its products. The only differentiator in this area is Mitsubishi’s network of Diamond contractors.

    Mitsubishi Ductless vs. HEIL Conditioners

    A U.S.-based company, HEIL manufactures a comparable number of models, six of which are ENERGY STAR rated. If you live in an area prone to wind storms, look into its models that have durability features to protect units from damage from debris. Other models contain sensors that automatically adjust cooling output, which can save you money.

    The SEER ratings on HEIL’s models start at the national minimum of 13 and go up to 19, which means you won’t be able to beat Mitsubishi’s highest energy efficiency rating with one of HEIL’s products.

    HEIL provides a variety of warranties for its models, covering lower-end models for a shorter period of one-to-three years. Its warranty does include the condenser and heat exchanger in addition to the compressor, however. But the company doesn’t have options to extend your warranty for several years like Mitsubishi.