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Hitachi Heat Pumps Review

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Hitachi Heat Pump

Hitachi Heat Pump In Brief:

One of the biggest sectors of Hitachi’s product offering relates to its vast array of heating and air conditioning systems. Combining their long history producing these types of products with the industry’s demand for greater electrification and more ‘green’ products, Hitachi diversified into the production of heat pumps.

Hitachi Company Overview:

First established in 1910, Hitachi was founded by Namihei Odaira, an engineer who graduated from the University of Tokyo. Since then, Hitachi has continued to expand and is now offering products in a variety of different sectors, including:

  • Digital systems.
  • Financial systems.
  • Power and renewable resources.
  • Railway systems.
  • Healthcare systems.

Since its inception, Hitachi has grown into a globalised conglomerate. In the modern day, the Japanese company focuses on three main sectors: Green Energy and Mobility, Digital Systems and Services, and Connective Industries, as it increases its presence in the Asian, European, and North American markets.

Why Should I Install A Hitachi Heat Pump?

As the world looks for new ways to become more environmentally friendly and less reliant on the burning of fossil fuels, renewable energy sources are becoming increasingly more popular. One key method that may be the future successor of the combi boiler and traditional central heating systems are air source heat pumps. 

Advantages Of Heat Pumps

  • More Environmentally Friendly: Air source heat pumps work by extracting the heat from outside your home and bringing it inside. This makes this renewable energy source vastly more environmentally friendly compared to the traditional central heating systems (such as heat pumps vs gas boilers) that rely upon the burning of fossil fuels.
  • They Provide Heating And Cooling: Not only will your air source heat pump work by maintaining a high temperature inside your home during the winter months, but it can also extract cold air during the summer. No matter the time of the year, a heat pump will make your house an even more comfortable place to live.  
  • Low Maintenance: Another key benefit of air source heat pumps is that they are extremely low maintenance. All you need to do in order to keep your heat pump working effectively is to ensure it remains clean and that nothing obstructs or damages the system.

Disadvantages Of Heat Pumps

  • Can Be Expensive: In order to run a heat pump on your property, the system will require electricity which is known for being more expensive compared to traditional gas boilers. However, the significantly higher efficiency level that comes with heat pumps (which typically stands at 300% or more) means that you will only see a marginal increase when it comes to air source heat pump running costs – and it may even be less if you’re switching from an old, poorly rated gas central heating system to a much more efficient heat pump.
  • Requires Planning Permission: Air source heat pumps require approved planning permission prior to installation. Not only can this be a time-consuming and stressful endeavour, but you may not receive the permission you require after embarking on the process.
  • May Not Be Suitable For Your Property: Heat pumps require a lot of space, both indoors and outdoors, because of the installation of various elements that make up the system. Not only will you need outdoor space to install your heat pump, but indoor room for a hot water cylinder. Additionally, you must also ensure that your property has sufficient insulation to help maintain the heat that heat pumps generate for your home.
  • You May Need To Purchase New Radiators And Underfloor Heating: If your property does not feature large radiators or underfloor heating, you may not receive the required heating benefits in order to keep your home at a comfortable temperature during the winter.

Hitachi Heat Pump Specifications

Since the company’s inception, Hitachi has become a major player in the production of heating and air conditioning systems and is now a market leader in the industry. When it comes to the manufacturer’s heat pump system offering, Hitachi offers four ranges of products, each with a variety of different models available. These four ranges are known as:

  • Yutaki M.
  • Yutaki S80.
  • Yutaki S Combi.
  • Yutaki S.

However, we will primarily focus on the first three ranges of air source heat pumps available from Hitachi. Additionally, all of the Hitachi Yutaki ranges carry a warranty period of 5 years, which starts from the date included on your invoice. Unlike other heat pump suppliers, you will not be required to complete any registration in order to be eligible for your product warranty, which many customers see as a huge plus from the start.

Hitachi Heat Pump Product Ranges

Hitachi offices

Best Efficiency: Yutaki M

Offering a cost effective heating solution for your home that will still provide a reliable performance level, the Yutaki M series is our best pick for the most efficient heat pump available from Hitachi. Carrying a Microgeneration Certification Scheme (MCS) certificate for quality assurance, the Yutaki M provides you with a highly customisable system that will keep running costs low.

Sadly, the Yutaki M series can only be installed outside your home, while the other two models mentioned in this article can be installed both inside and outside. This could be a major drawback if you do not have the required amount of installation space outside your home.

  • Efficiency Rating: A++ to A+++.
  • Minimum Heating Temperature: -20°C to -25°C.
Yutaki M RASM-2VRE and RASM-3VRE
RASM-2VRERASM-3VRE
Nominal Capacity Max
Heating kW4.30 (6.50)8.00 (11.00)
Cooling kW4.50 (5.00)6.50 (7.00)
Power Consumption Nom
Heating kW0.821.74
Cooling kW1.001.94
Energy Class Rating
35°CA+++A+++
55°CA++A++
Noise Level DB(A)6168
Heating Operating Range
Outdoor Temperature °C (DB) -20 ~ 25-20 ~ 25
Water Outlet Temperature °C20 ~ 6020 ~ 60
Operating Range Cooling
Outdoor Temperature °C (DB) 10 ~ 4610 ~ 46
Water Outlet Temperature °C5 ~ 225 ~ 22
Operating Range Tank (DHW)
Outdoor Temperature °C (DB) -20 ~ 35-20 ~ 35
Water Outlet Temperature °C30 ~ 7530 ~ 75
Dimensions (HxWxDmm)704x1248x300704x1248x300
Weight (kg)7678

Best In Operating Conditions: Yutaki S80

If you are looking to save space by installing a smaller heat pump, then look no further than the Yutaki S80. Not only is this model the smallest out of the three mentioned in this article, but it also offers the highest hot water temperature at 80°C.

The smaller operating conditions required by the Yutaki S80 make it a popular option in the air source heat pump market as it is more accessible than larger models. However, it is also one of the highest quality products available by Hitachi and comes with a premium price tag. 

Additionally, you should also take into consideration that this heat pump will take longer to install due to the complex nature of its design.

  • Efficiency Rating: A++ to A+++.
  • Minimum Heating Temperature: -20°C to -25°C.
Yutaki S80 RWH-4.0VNFE – RWH-6.0VNFE
RWH-4.0VNFERWH-5.0VNFERWH-6.0VNFE
Nominal Capacity Max
Heating kW11.00 (15.20)14.00 (16.70)16.00 (17.80)
Power Consumption Nom
Heating kW2.122.903.43
Energy Class Rating
35°CA+++A++A++
55°CA++A++A++
Noise Level Sound Power DB(A)575758
Heating Operating Range
Outdoor Temperature °C (DB) -25 ~ 25-25 ~ 25-25 ~ 25
Water Outlet Temperature °C20 ~ 8020 ~ 8020 ~ 80
Operating Range Tank (DHW)
Outdoor Temperature °C (DB) -25 ~ 35-25 ~ 35-25 ~ 35
Water Outlet Temperature °C30 ~ 7530 ~ 7530 ~ 75
Dimensions (HxWxDmm)751x600x623751x600x623751x600x623
Weight (kg)125129129

Best For The Environment: Yutaki S Combi

One of the key benefits of the Yutaki S Combi is that the system features an integrated hot water cylinder, which can help you save a significant amount of space when installing the system in your home. Additionally, this Hitachi model is the only system manufactured by the Japanese company that offers a back-up heating element. This ensures that your house will still receive hot water, even during an emergency.

However, these additional benefits come at a cost. While the S Combi more than makes up for the price increase with its special features, there are cheaper models available on the heat pump market.

  • Efficiency Rating: A++ to A+++.
  • Minimum Heating Temperature: -20°C to -25°C (depending on the model).
Yutaki S Combi RWD-2.0NRW(S)ERWD-3.0NRW(S)E
RWD-2.0NRW(S)ERWD-2.5NRW(S)ERWD-3.0NRW(S)E
Nominal Capacity Max
Heating kW4.30 (6.50)6.00 (8.60)8.00 (11.00)
Cooling kW4.00 (5.00)5.30 (6.00)6.50 (7.00)
Power Consumption Nom
Heating kW0.821.251.74
Cooling kW1.001.471.94
Energy Class Rating
35°CA+++A+++A+++
55°CA++A++A++
Noise Level DB(A)373737
Heating Operating Range
Outdoor Temperature °C (DB) -20 ~ 25-20 ~ 25-20 ~ 25
Water Outlet Temperature °C20 ~ 6020 ~ 6020 ~ 60
Operating Range Cooling
Outdoor Temperature °C (DB) 10 ~ 4610 ~ 4610 ~ 46
Water Outlet Temperature °C5 ~ 225 ~ 225 ~ 22
Operating Range Tank (DHW)
Outdoor Temperature °C (DB) -20 ~ 35-20 ~ 35-20 ~ 35
Water Outlet Temperature °C30 ~ 7530 ~ 7530 ~ 75
Dimensions (HxWxDmm)1750x600x7331750x600x7331750x600x733
Weight (kg)
200 L Tank121122122
260 L Tank131132132

Hitachi Heat Pumps FAQs

Q: Is My House Suitable For An Air Source Heat Pump?

A: In the UK, most residential property types will be suitable for the installation of an air source heat pump. However, you must ensure that you have:

  • An adequate amount of radiators that are well sized.
  • A home that meets the required insulation levels needed to ensure that a heat pump will be able to heat your home effectively.
  • Enough space both inside and outside your home for the required equipment to run your heat pump.

If you are unsure as to whether your home fulfils the requirements for an air source heat pump, why not get in contact with us. At Heat Pumps UK, we can help you find the perfect installers for your project..

Q: Are Heat Pumps Loud?

A: There is a common misconception that air source heat pumps are quite loud when they are running, but just how noisy are air source heat pumps? Well, whilst you may occasionally notice a background hum while your heat pump is working to heat your home and water, typically they can make as low as 40 decibels of noise – about the same noise as a refrigerator makes.

The three main contributors that can impact how much noise your air pump makes, are:

  • The quality of your unit.
  • The acoustic environment surrounding your air source heat pump.
  • The running conditions of your air pump.

Q: Can I Get A Free Air Source Heat Pump?

A: Through the Boiler Upgrade Scheme (BUS), you are able to apply for up to £7,500 to help pay for the cost and installation of either an air source heat pump or a ground source heat pump. However, to be eligible for the scheme:

  • You must live in either England or Wales.
  • Your home must have a valid Energy Performance Certificate (EPC) rating, while also having up to date insulation.

However, if you live in Scotland, then the Home Energy Scotland scheme may be able to help you.

Hitachi Heat Pumps Review Summary

Depending on the priorities of your household, there will be a Hitachi heat pump available to fulfil your heating, cooling, and hot water needs. Our top three picks of Hitachi heat pumps are:

  • Best Efficiency: Yutaki M.
  • Best In Operating Conditions: Yutaki S80.
  • Best For The Environment: Yutaki S Combi.

If you are still unsure as to which heat pump is the best option for your household, then why not get in touch with our heat pump specialists who will be able to answer any questions you may still have.

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Ollie Creevy
Ollie has been writing content online about home improvements for over 3 years. With a real interest and in-depth knowledge of heat pumps and ECO home improvement measures you can use to save on your energy bills. Ollie also keeps up to date with all the Government grants available for you to take advantage of like ECO4 and the Boiler Upgrade Scheme.