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Mitsubishi Heat Pump Reviews: Pros, Cons, and Costs (2023)

In the market for a new heat pump? Consider one built by Mitsubishi. This brand has a comprehensive range of heat pumps to choose from as well as a strong reputation for quality. In this guide, we'll cover features in detail and offer tips on how to choose the best Mitsubishi heat pump for your needs.

April 12, 2023

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About The Mitsubishi Group

For many, the Mitsubishi name is synonymous with quality, whether in cars or in any of the many products this group manufactures. With its origins in Japan, this global group consists of divisions across many industries, including vehicles, electronics, machinery, and logistics.

This international corporation traces its start back to 1870, when it was primarily a shipping company. Its founder, Yataro Iwasaki, came up with the name Mitsubishi by combining two words: mitsu, which means three, and hishi, which means water caltrop, a plant also referred to as water chestnut. This name aligned with the company’s three-diamond logo.

From its beginnings over 150 years ago, the company has become one of the largest business entities in Japan. Today its global reach improves lives in many ways, providing everything from efficient vehicles we rely on for transportation, to energy solutions that are intelligent and sustainable.

Mitsubishi Heat Pumps

As a world leader in heat pump technology, Mitsubishi supplies a wide range of products designed to meet the heating and cooling needs of homes and businesses alike. Mitsubishi heat pumps are found everywhere from small residential units to large commercial facilities.

Known for efficiency, reliability, and the level of comfort they provide, Mitsubishi heat pumps are popular choices. The company’s air source heat pumps perform well in many types of climates, offering greater energy efficiency than many types of traditional heating and cooling systems.

We present the main heat pump options in Mitsubishi’s air source collection, along with the features, pros, and cons of each model.

Ecodan R744 Air Source Heat Pump

A compact and efficient monobloc unit, the Ecodan R744 is one of Mitsubishi’s latest air source heat pump models. It was designed specifically for new-build applications, since its performance levels are ideally suited for spaces with higher hot-water demands. This heat pump is also well-suited for existing homes and remodelling projects. This model comes in a well-packaged hydro box that’s highly compatible with different configurations, making the Ecodan R744 an excellent option.

Built with hydraulic components, this product comes with three flow sensors, a magnetic filter, and an automatic air vent. It comes with standard energy monitoring capabilities and the option of Wi-Fi enabled controls.

In line with Mitsubishi's core brand values, the Ecodan R744 Air Source Heat Pump is environmentally friendly. It uses natural CO2 refrigerant, tested to have an Ozone Depletion Potential of zero and a Global Warming Potential of one. This unit operates at a COP of 3.0, which is a an above-average score for air source heat pumps.


What are the advantages of buying the Ecodan R744 Air Source Heat Pump for your home? Here are several:

  • Standard energy monitoring. Complete with a built-in energy monitoring system, the R744 is easy to manage and monitor in terms of energy consumption.
  • Broad operating ambient temperature. This heat pump can perform optimally in ambient temperatures as low as -15°C and as high as +35°C.
  • Low operating noise levels. The Ecodan R744 has a class-leading low operating sound power level of just 53 dBA.


  • Not as energy efficient. Sitting at a rating of A+, the Ecodan R744 Heat Pump is not as energy efficient as many other air source units.
  • Limited output options. This heat pump is only available in outputs of 4.5kW, making it a less powerful option within Mitsubishi’s air source line-up.
Ecodan R744 Air Source Heat Pump

Ecodan R32 Ultra Quiet PUZ Air Source Heat Pump

Boasting an innovative and stylish look, the Ecodan R32 Ultra Quiet PUZ is a monobloc air source heat pump available in outputs of 6.0kW, 8.5kW, and 11.2kW. This self-contained unit requires only a water and electric connection to be installed, and while slightly larger than the R744, is still fairly compact.

It has been designed for domestic use, satisfies development standards (MCS020), and features something any homeowner can appreciate: a minimum energy efficiency rating of A++. A built-in Melcloud WiFi system makes it easy for you to monitor and control this heat pump from anywhere in the world through an internet-connected device. It can operate in ambient temperatures as cold as -20°C and as warm as +35°C, and it has an impressive heating COP of 3.2.

But above all, what really makes this heat pump stand out is its minimal operating noise levels. As its name implies, the R32 is ultra quiet and is among Mitsubishi's smoothest running heat pumps. It sits at a sound power level of just 58 dBA, three times quieter than previous models. This makes it an ideal option for homes with less property space and projects requiring flexible installation options.


Homeowners love the Ecodan R32 Ultra Quiet PUZ for many reasons, including the following:

  • Super quiet. This heat pump is incredibly quiet and has a sound power level of 58 dBA, three times quieter than previous models in its line-up.
  • Range of power options. The R32 Ultra Quiet is available in 6.0kW, 8.5kW, and 11.2kW power outputs, offering homeowners plenty of options to choose from.
  • Easy to install. Being a self-contained product, this heat pump only requires a water and electric connection to be installed. This makes it a viable option for many homes and different scenarios.


Some of the possible drawbacks of choosing an Ecodan R32 Ultra Quiet heat pump include:

  • Larger environmental footprint. While still relatively environmentally friendly, this heat pump's refrigerant has a GWP of 675, which is higher than the GWP of some other Mitsubishi models.
  • Lower operating temperature. The Ecodan R32 Ultra Quiet is capable of operating in ambient temperatures as low as -20°C, which is slightly colder than the R744.
Ecodan R32 Ultra Quiet PUZ Air Source Heat Pump

Ecodan R32 Compact PUZ Air Source Heat Pump

Similar in style to the Ecodan R32 Ultra Quiet PUZ, the Ecodan R32 Compact PUZ Air Source Heat Pump is a more compact version of the previous model. In addition to focusing on quiet operation, this heat pump also features a compact design, measuring 950 by 330 millimetres in width and depth. It measures ten centimetres less in width than the Ultra Quiet unit, and it’s about eight centimetres shorter in height.

In terms of performance, the R32 Compact PUZ packs a slightly smaller, although still impressive, punch than its counterpart. It's available only in a power output of 5.0kW and has a slightly lower Coefficient Of Performance of 3.0. The energy efficiency rating stays the same for this product at A++. Its similar use of R32 refrigerant gives it a GWP of 675.


Why choose the Ecodan R32 Compact PUZ Air Source Heat Pump? Here are some of its best benefits:

  • Compact design. The R32 Compact PUZ's size is one of its most popular features. As one of the smallest heat pumps in Mitsubishi's catalogue, it's incredibly versatile and is a viable option for plenty of homeowners.
  • Good Coefficient Of Performance. Although slightly lower than the Ultra Quiet model, the Compact PUZ heat pump boasts an above average COP when compared to other air source products.
  • Good operating temperature range. This heat pump is able to maintain full operating capacity in temperatures as low as -20°C and as high as as +35°C.


Are there any downsides to choosing the Ecodan R32 Compact PUZ? Here are some things to consider:

  • Noisier operation. The Ecodan R32 Compact PUZ is slightly louder than the R32 Ultra Quiet, with a higher sound power level of 61 dBA.
  • Limited power options. While 5.0kW is likely able to satisfy most homeowners' needs, this heat pump is available only in one power output and may not be the best option for those who need more choices.
Ecodan R32 Compact PUZ Air Source Heat Pump

Ecodan R32 Zubadan PUZ Air Source Heat Pump

Designed for larger spaces and more load intensive applications, the Ecodan R32 Zubadan monobloc air source heat pump is the most powerful product on this list. It offers 14kW of power and contains two fans for increased airflow, making it ideal for use in situations where other heat pumps might struggle. This model is also the tallest on this list, measuring 1,350 millimetres in height.

The Ecodan R32 Zubadan PUZ uses R32 refrigerant and has a GWP of 675. It has a fair energy efficiency rating of A++ and a lower Coefficient Of Performance of 2.45.

Where this heat pump delivers the most value is in its functionality and performance, offering a great flow rate of over 40 L/min and having the ability to operate in temperatures as cold as -28°C.

The R32 Zubadan is also a self-contained unit and only requires water and electric connections to be installed.


What are the benefits of the Ecodan R32 Zubadan PUZ Air Source Heat Pump? Here are some of the product's most notable advantages:

  • Very powerful. With an impressive 14kW output, this heat pump offers much more power, in some cases over twice as much, than other products in Mitsubishi's air source collection.
  • Impressive minimum operating temperature. The Ecodan R32 Zubadan PUZ is able to operate in ambient temperatures as low as -28°C, making it among the toughest heat pumps on this list.
  • Easy to install. This product is completely self-contained and only requires an electric and water connection to be installed, ideal for many homes and properties.


Although the R32 Zubadan PUZ is popular, it does have some downsides. Here are the most noteworthy:

  • Large. The R32 Zubadan's impressive power comes with the caveat of a larger size. Although it is about the same width as other Mitsubishi heat pumps, it is much taller and therefore may not be the best option for some homes with space restrictions.
  • Lower COP. This model logs a lower COP than its counterparts at 2.45. This can still be considered good for an air source heat pump, but it is considerably less than other products on this list.
Ecodan R32 Zubadan PUZ Air Source Heat Pump

Ecodan Coastal Protection Air Source Heat Pump

Within the range of air source heat pumps we’ve just covered, there exists a subseries that's been designed specifically for use in coastal environments: the Ecodan Coastal Protection. This line offers adaptations of the company's other models, making the series able to withstand the corrosive effects of salt water and air. These changes make the coastal protection series a great choice for those who live near the ocean.


There are some great advantages to owning a Coastal Protection heat pump, including:

  • Uncompromised performance. In addition to being built with protective corrosion-resistant materials, the series doesn't sacrifice any of the power or functionality of Mitsubishi's standard models.
  • Long lifespan. The increased durability of the Ecodan Coastal Protection line means that these heat pumps are built to last and sure to deliver consistent performance for years to come.
  • Available for all models.  Mitsubishi offers the Ecodan Coastal Protection upgrade for all models in its air source heat pump range, giving customers plenty of options.


Homeowners should be aware of the potential downsides of choosing a Coastal Protection heat pump, which include:

  • Specific installation requirements. Mitsubishi recommends that homeowners install their Coastal Protection heat pumps away from direct exposure to sea spray, limiting their options of where the unit can be installed on the property.
  • Slightly higher price tag. Because of the added durability and protective materials used, these models come with a slight price increase when compared to the standard versions.
Ecodan Coastal Protection Air Source Heat Pump

How Much Does A Mitsubishi Heat Pump Cost?

Heat pumps come in many different forms and with a range of different features. This is especially true when it comes to Mitsubishi. The brand offers a very diverse collection of air source models, each with its own unique capabilities. As a result, the cost of these products can vary significantly from one to the next.

Mitsubishi heat pumps are generally more expensive than other brands on the market. A basic model from the company's air source range, for example, can start at around £6,000. More feature-rich models, meanwhile, can cost upwards of £12,000.

Installation costs need be taken into account when budgeting for a Mitsubishi heat pump. While the company's products are designed to be easy to install, the process will require a professional contractor. As a result, homeowners can expect to pay several hundred dollars more for installation.

A great way to offset the cost of your new heat pump is to look into incentives. In the past, the government-run Renewable Heat Incentive (RHI) program offered homeowners the chance to upgrade to green heating solutions at a discount. Check to see what programs are available today. Look into the Clean Heat Grant to see if it applies to your situation.

Choosing The Right Mitsubishi Heat Pump For Your Home

If you're in the market for a new heat pump, Mitsubishi is definitely a brand worth considering. The company's products are some of the most technologically advanced and energy-efficient on the market, and they come with a long list of features to choose from.

With so many different models to consider, it can be tough to know which one is right for your home. Here are a few things to keep in mind that can help you narrow down your options and select the best Mitsubishi heat pump for your needs.

Consider Your Climate

One of the first things you'll want to think about is the climate in your area. If you live in an area with long, cold winters, you'll need a heat pump that's capable of delivering enough heat to keep your home warm and comfortable throughout the year. Conversely, if you live in a warmer climate, you won't need as much heating power and can focus on finding a model with great cooling capabilities.

Choose The Right Size

Another important factor to consider is the size of your home. Mitsubishi heat pumps are available in a range of different sizes, and it's important to choose one that's properly sized for your needs. If you get a unit that's too small, it won't be able to effectively heat or cool your entire home. On the other hand, if you get one that's too big, it may end up costing you more money in the long run.

Consider Your Budget

A big factor to consider when choosing a heat pump is your budget. Mitsubishi models can vary significantly in price, so it's important to have a good idea of how much you're willing to spend before you start shopping around. Once you have a budget in mind, you can start narrowing down your options and finding a heat pump that's right for you. Keep in mind that the initial cost is not the only thing you should be thinking about; be sure to factor in the cost of running and maintaining the unit over its lifetime.

Compare Efficiency Ratings

When comparing different heat pump models, be sure to pay attention to their efficiency ratings. This will give you a good idea of how much energy the unit will consume and how much it will cost to run. In general, Mitsubishi heat pumps score well, but there are differences between units.

Some models are more efficient than others, so be sure to compare the ratings of different models before making your final decision.

Consider The Features

Finally, you'll want to think about the features that matter to you. Mitsubishi heat pumps come with a wide range of different features, so take the time to figure out which ones are most important to you. Do you want a heat pump with a built-in thermostat? One that can be controlled remotely? Or one with specific settings for different rooms in your home? Make sure to think about what you want before you start shopping around.

Mitsubishi is a trusted name in the world of heat pumps, and for good reason. The company offers a wide range of high-quality products that are designed to provide efficient and effective heating for any home. By considering your climate, your budget, and the features that are important to you, you can narrow down your options and select the best Mitsubishi heat pump for your needs.

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